Continental Drift Theory1
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Alfred Wegener first proposed the continental drift theory in 1910, which hypothesized that the continents were once joined together in a single landmass called Pangaea. Wegener provided three lines of evidence to support his theory: geological formations of continents matched like puzzle pieces; matching plant and animal fossils were found on separated continents; and the climate and fossils found in certain areas did not match their present climate and locations. While initially rejected by scientists, Wegener's theory helped establish the modern theory of plate tectonics.
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Drifting continents powerpoint
Alfred Wegener proposed the theory of continental drift, which stated that the Earth's continents were once joined together in a supercontinent called Pangea before slowly drifting apart over hundreds of millions of years. Wegener supported this theory with three types of evidence: matching landforms between continents, fossils of the same plants and animals found on separated continents, and evidence that climates had changed in ways consistent with continental movement rather than climate change alone. This evidence convinced many of the accuracy of Wegener's theory of continental drift.
Continental drift wegener evidence
Alfred Wegener first proposed the continental drift hypothesis in 1915, noting that continents seemed to fit together like puzzle pieces. He suggested they were once part of a supercontinent called Pangea that had since drifted apart. Wegener was unable to explain what caused the drifting and was ridiculed, dying in 1950 still without having convinced others. In the 1950s and 1960s, further evidence was discovered that supported continental drift, including matching rock formations and fossils across continents.
Pangaea USE
1) Alfred Wegener was a German scientist who, in 1912, proposed the theory of continental drift which hypothesized that the continents were once joined together in a supercontinent called Pangaea before slowly drifting apart.
2) Wegener developed this theory after studying fossil records from South America and Africa and finding that some fossils were identical, suggesting the continents were once attached.
3) He proposed that around 200 million years ago, the continents of Pangaea began to separate and drift to their current locations due to plate tectonics.
Continental Drift Theory
Alfred Wegener first proposed the continental drift theory in 1910, which hypothesized that the continents were once joined together in a single landmass called Pangaea. Wegener provided three lines of evidence to support this theory: geological formations of continents matched together, matching plant and animal fossils found on different continents, and evidence that glaciers had extended farther than current climates would allow indicating continents had moved. While initially rejected, Wegener's theory helped establish the modern theory of plate tectonics.
Continental drift
Alfred Wegener first proposed the theory of continental drift, which suggested that the continents were once joined together in a super continent called Pangaea before drifting apart to their current locations. Wegener's theory was initially rejected because he could not explain the driving force behind continental movement. Evidence that later emerged in support of continental drift includes: matching fossil and rock formations between continents, matching climate zones in pole and equatorial regions, and magnetic pole reversal patterns in ocean floor sediments. This evidence helped prove that continents have shifted positions over time.
Continental drift - A2 Geography
Continental drift is the slow movement of continents across the Earth's surface over geological time due to tectonic plate motions. Evidence for continental drift includes: the matching continental outlines of separated continents; matching fossil, rock, and glacial deposits between continents; and paleomagnetic data showing continents have moved over time. The theory of continental drift was proposed by Alfred Wegener in 1915 but was not widely accepted until the 1960s when seafloor spreading and plate tectonics were discovered, providing a mechanism to explain continental drift.
Continental Drift Notes - Jenny
Alfred Wegener first proposed the theory of continental drift in 1915, suggesting that the continents were once joined together in a single landmass called Pangaea that has since drifted apart. Wegener provided evidence from matching coastlines, fossil distributions, and climate patterns from over 250 million years ago to support his hypothesis. However, his theory was rejected by the scientific community at the time due to the lack of a proposed mechanism for continental movement and because it contradicted established ideas about mountain formation and Earth's cooling history. Continental drift was not widely accepted until new evidence emerged in the 1950s.
Continental Drift Theory
Alfred Wegener was a German scientist born in 1880 who developed the theory of continental drift, which proposed that the continents were once joined together in a supercontinent called Pangaea. He provided evidence from matching continental coastlines, fossil distributions, and past climates to support his hypothesis. Harry Hess was an American geologist born in 1906 who helped develop the theory of plate tectonics, proposing that the Earth's lithosphere is broken into rigid plates that move over Earth's surface. He contributed the idea of seafloor spreading to explain how new oceanic crust is formed at mid-ocean ridges. The theory of plate tectonics eventually subsumed and expanded upon Wegener's idea of continental drift
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Drifting continents powerpoint
Alfred Wegener proposed the theory of continental drift, which stated that the Earth's continents were once joined together in a supercontinent called Pangea before slowly drifting apart over hundreds of millions of years. Wegener supported this theory with three types of evidence: matching landforms between continents, fossils of the same plants and animals found on separated continents, and evidence that climates had changed in ways consistent with continental movement rather than climate change alone. This evidence convinced many of the accuracy of Wegener's theory of continental drift.
Continental drift wegener evidence
Alfred Wegener first proposed the continental drift hypothesis in 1915, noting that continents seemed to fit together like puzzle pieces. He suggested they were once part of a supercontinent called Pangea that had since drifted apart. Wegener was unable to explain what caused the drifting and was ridiculed, dying in 1950 still without having convinced others. In the 1950s and 1960s, further evidence was discovered that supported continental drift, including matching rock formations and fossils across continents.
Pangaea USE
1) Alfred Wegener was a German scientist who, in 1912, proposed the theory of continental drift which hypothesized that the continents were once joined together in a supercontinent called Pangaea before slowly drifting apart.
2) Wegener developed this theory after studying fossil records from South America and Africa and finding that some fossils were identical, suggesting the continents were once attached.
3) He proposed that around 200 million years ago, the continents of Pangaea began to separate and drift to their current locations due to plate tectonics.
Continental Drift Theory
Alfred Wegener first proposed the continental drift theory in 1910, which hypothesized that the continents were once joined together in a single landmass called Pangaea. Wegener provided three lines of evidence to support this theory: geological formations of continents matched together, matching plant and animal fossils found on different continents, and evidence that glaciers had extended farther than current climates would allow indicating continents had moved. While initially rejected, Wegener's theory helped establish the modern theory of plate tectonics.
Continental drift
Alfred Wegener first proposed the theory of continental drift, which suggested that the continents were once joined together in a super continent called Pangaea before drifting apart to their current locations. Wegener's theory was initially rejected because he could not explain the driving force behind continental movement. Evidence that later emerged in support of continental drift includes: matching fossil and rock formations between continents, matching climate zones in pole and equatorial regions, and magnetic pole reversal patterns in ocean floor sediments. This evidence helped prove that continents have shifted positions over time.
Continental drift - A2 Geography
Continental drift is the slow movement of continents across the Earth's surface over geological time due to tectonic plate motions. Evidence for continental drift includes: the matching continental outlines of separated continents; matching fossil, rock, and glacial deposits between continents; and paleomagnetic data showing continents have moved over time. The theory of continental drift was proposed by Alfred Wegener in 1915 but was not widely accepted until the 1960s when seafloor spreading and plate tectonics were discovered, providing a mechanism to explain continental drift.
Continental Drift Notes - Jenny
Alfred Wegener first proposed the theory of continental drift in 1915, suggesting that the continents were once joined together in a single landmass called Pangaea that has since drifted apart. Wegener provided evidence from matching coastlines, fossil distributions, and climate patterns from over 250 million years ago to support his hypothesis. However, his theory was rejected by the scientific community at the time due to the lack of a proposed mechanism for continental movement and because it contradicted established ideas about mountain formation and Earth's cooling history. Continental drift was not widely accepted until new evidence emerged in the 1950s.
Continental Drift Theory
Alfred Wegener was a German scientist born in 1880 who developed the theory of continental drift, which proposed that the continents were once joined together in a supercontinent called Pangaea. He provided evidence from matching continental coastlines, fossil distributions, and past climates to support his hypothesis. Harry Hess was an American geologist born in 1906 who helped develop the theory of plate tectonics, proposing that the Earth's lithosphere is broken into rigid plates that move over Earth's surface. He contributed the idea of seafloor spreading to explain how new oceanic crust is formed at mid-ocean ridges. The theory of plate tectonics eventually subsumed and expanded upon Wegener's idea of continental drift
Continental Drift
The document discusses evidence that supports the theory of continental drift proposed by Alfred Wegener in 1915. Some of the key evidence includes:
1) The fit of the continents' coastlines and continental shelves suggests the continents were once joined together.
2) Glacial deposits and fossils found in regions that are now tropical provide evidence these areas were once farther from the equator when the continents were in different positions.
3) Certain fossil types found across continents that are now separated by oceans could not have crossed the oceans, indicating the land was once joined.
Evidence... notes
1. Alfred Wegener first proposed the theory of continental drift in 1912, suggesting that the continents were once joined together in a supercontinent called Pangaea and have since moved to their current locations.
2. Evidence such as matching rock formations and fossil distributions across continents supports continental drift. Fossils of the same plants and animals have been found on separated continents.
3. The theory of plate tectonics emerged in the 1950s with the discovery of seafloor spreading at ocean ridges, where new crust is formed and plates move apart, providing a mechanism for continental drift.
Continental drift theory (1)
Alfred Wegener first proposed his theory of continental drift in 1910. He noticed that the continents seemed to fit together like puzzle pieces. Wegener also presented three lines of evidence to support his theory: landforms on different continents matched up, matching plant and animal fossils were found on separated continents, and patterns of past climates did not match the continents' current positions. However, Wegener's theory was initially rejected because he could not explain how or why the continents would move. Wegener believed that evidence from all earth sciences was needed to understand the planet's past configurations and that new discoveries could alter conclusions.
Continental drift
This document discusses the theory of continental drift, including its origins and evidence that supports it. [1] Abraham Ortelius first hypothesized in 1596 that continents drift due to earthquakes and floods. [2] Alfred Wegener formally proposed the theory of continental drift in 1915, suggesting continents were once joined together before breaking apart and drifting to their present locations. [3] Fossil, rock, and glacial evidence from different continents provides support, such as similar plant and animal fossils in South America, Africa, and Antarctica.
Continental Drift Presentation1
This document discusses Alfred Wegener's theory of continental drift and plate tectonics. It provides evidence that supports the idea that the continents were once joined together in a supercontinent called Pangaea, including how the continents fit together, matching fossil and rock formations, and evidence of sea floor spreading from ocean research. Understanding plate tectonics allows geologists to explain landforms, find resources, and predict natural hazards.
The Theory of Pangaea by: Rebecca
The document summarizes Alfred Wegener's theory of Pangaea from 1910, which proposed that all the continents were originally joined together in a supercontinent called Pangaea. It describes how Pangaea broke apart over millions of years, drifting the continents to their current locations. Fossil, geological, and geographical evidence from matching coastlines, mountain ranges, and glacial deposits on different continents supported the theory that they were once joined.
Continental drift
- Alfred Wegener developed the hypothesis of continental drift in 1910, proposing that the continents were once joined together in a supercontinent called Pangaea before drifting apart. This idea is known as continental drift.
- Wegener provided evidence from matching fossil distributions, rock formations, and past climate patterns between continents now separated by oceans that supported his hypothesis of continental movement over time.
- However, Wegener's hypothesis was rejected by most geologists in the early 1900s due to lack of mechanisms to explain continental motion and discrepancies with existing geological theories. It was not widely accepted until new evidence emerged in the 1950s.
Continental drift notes
- Alfred Wegener proposed the theory of continental drift, suggesting that continents had once been joined together in a single landmass called Pangaea before drifting apart. However, he could not provide a satisfactory explanation for the force driving the drift.
- Evidence from matching landforms, fossil distributions, and climate clues in rock strata provided growing support for continental drift, but it took decades for most geologists to accept the theory.
- Convection currents in the Earth's mantle, driven by heat from the core, cause the crust and tectonic plates to slowly move over time, allowing for continental drift. This theory of plate tectonics eventually replaced continental drift as the explanation for drifting continents.
Continental Drift
1) The document discusses Alfred Wegener's theory of continental drift from 1912, which proposed that the continents were once joined together in a single landmass called Pangaea before slowly drifting apart.
2) While Wegener's theory was controversial at the time due to a lack of evidence, it was later proven correct with the discovery of plate tectonics.
3) There is geological evidence that supports the continental drift theory, including matching fossil records, rock formations, mountain ranges, and glacial deposits found across continents.
The pangaea theory
This is a powerpoint showing the Pangaea theory. A theory of the continents once forming a huge super continent before breaking apart. Alfred Weneger, a German scientist, was the one who thought of the continents once existing as one before splitting and breaking apart.
Continental Drift Theory Template
The document discusses the continental drift theory proposed by Alfred Wegener in the early 1900s. It provides evidence that Wegener used to support his theory, including matching landforms between continents, identical fossil finds in separated continents, and plant fossils found in unexpected locations. It also discusses Harry Hess and his theory of sea floor spreading, which helped explain continental drift. Hess proposed that new material is added at mid-ocean ridges, evidenced by older rocks found farther from ridges.
Pangea
The document discusses Alfred Wegener's theory of continental drift from 1912. It explains that Wegener noticed that fossils found in South America were identical to those found in Africa and proposed that the continents were once joined together in a supercontinent called Pangea. The theory described the continents gradually drifting apart over millions of years due to plate tectonics.
Continental Drift Theory by Rajkumar
1. CONTINENTAL DRIFT
“Father” of this theory is Alfred Wegener.
2. The Theory of Continental Drift
Proposed by Alfred Wegener (1912):-
A large super-continent PANGEA split into smaller fragments about 200-300 million years ago. These then drifted apart to form the present arrangement of continents.
Most geologists were highly skeptical and the idea was NOT widely accepted.
3. This is what Wegener thought Pangea looked like 200-300 million years ago.
4. EVIDENCE OF CONTINENTAL DRIFT
Wegener provided four main pieces of evidence to support his theory that the continents had been drifting over time.
5. 1. JIGSAW PUZZLE
Wegener noticed that if we could move present day continents around, several continents look like they would fit together like pieces of a jigsaw puzzle.
6. 2. FOSSILS
Wegener also found fossils of the same plants and animals on different continents now separated by vast oceans. They could only be found this way if the continents had once been joined together.
7. 3. ROCK SEQUENCE
Wegener also found that mountain ranges have a similar sequence of type of rock and age on both sides of the Atlantic Ocean, suggesting they were once part of the same mountain range.
8. 4. GLACIAL SCARS
Wegener found evidence of glacial scars left behind by giant ice sheets from the same time period in Southern Africa, India, Australia and South America.
The white areas were covered by ice and tundra about 300 million years ago (arrows show the direction of ice movement).
the continents were once part of a single larger continent that then split apart, drifting to their present positions over the last 300 million years.
9. WHAT COULD MOVE THE CONTINENTS?
Unfortunately for Wegener, he could not explain what force was powerful enough to move entire continents around the planet.
For reasons was he can't explain
Alfred Wegener died on expedition in Greenland in 1930 still searching for answers to the question of what force could be responsible for the movement of the continents.
10. Reason for Support Continental Drift?
Fit of continents
Apparent discrepancy in inferred latitudes of ancient rocks
Rocks of same age and similar characteristics on different continents
Distribution of similar plants and animals on different continents
11. WEGENERS CONCLUSIONS:
The continents have drifted over the past 300 million
years to their present positions!
(not a very popular idea at the time!!!)
Continental drift and plate tectonics
The document discusses Alfred Wegener's theory of continental drift from 1912 and plate tectonic theory. Continental drift proposed that continents moved and were once joined, explaining geological matches between distant coastlines. However, it did not explain how or why continents moved. Plate tectonic theory improved on this by proposing that the lithosphere is divided into plates which float on the asthenosphere, allowing continents to move by explaining how they drift due to the movement of tectonic plates.
Continental drift theory
The Continental Drift Theory proposes that the continents were once joined together and have since drifted apart. Key evidence for this theory includes:
1) The coastlines of continents on opposite sides of oceans, such as Africa and South America, appear to fit together like puzzle pieces.
2) Certain fossil species, such as Cynognathus, have been found in rock formations on separated continents, indicating the continents were once joined.
3) Mountain ranges and rock formations with the same structure and composition are found on separated continents today.
Theory+of+continental+drift
This document summarizes Alfred Wegener's theory of continental drift, which proposed that the continents were once joined together and have since drifted apart. Wegener noticed that the continents seemed to fit together like puzzle pieces. He gathered evidence from matching landforms, identical fossil distributions, and past climate patterns on separated continents to support his hypothesis of continental movement. While his theory was initially rejected due to lacking an explanation for the driving mechanism of drift, Wegener's extensive evidence helped revive consideration of plate tectonics and continental drift.
9/13/11 and 9/14/11: Continental Drift and Pangaea
Scientists found coconut fossils in Antarctica where it is very cold. This supports the idea of continental drift because it shows that Antarctica used to have a warmer, tropical climate before drifting to its current polar location. The fossil evidence suggests that the continents have moved over time, carrying climates and organisms along with them.
Evidence in support of continental drift
Continental drift is supported by evidence from paleoclimatology, paleoglaciation, fossil correlation, and paleomagnetism. Paleoclimatology shows that coal deposits, which form in tropical areas, exist in high northern latitudes because the continents were once located farther south. Fossil correlation finds matching fossils on separated continents. Paleomagnetism finds that ancient lava flows on separated continents recorded the same magnetic field orientation when the lava solidified, indicating the continents were once joined.
Continental Drift Theory and Plate Tectonic
I am a student of SUST and my subject is "Geography & Environment". Topic of this presentation is " Continental Drift Theory and Plate Tectonic ".
Chapter 14.1: The Continental Drift Hypothesis
8th Grade Integrated Science Chapter 14 Lesson 1 on the Continental Drift Hypothesis. This is a short introduction to Alfred Weger and the current evidence used to support his theory. There is a short explanation of the fossil and rock evidence found.
Continental drift theory (1)
Alfred Wegener first proposed his theory of continental drift in 1910. He noticed that the continents seemed to fit together like pieces of a puzzle. Wegener also presented three lines of evidence to support his theory: landforms on different continents matched up, matching plant and animal fossils were found on separated continents, and patterns of past climates did not match the continents' current positions. However, Wegener's theory was initially rejected because he could not explain how or why the continents would move. Wegener believed that evidence from all earth sciences was needed to understand the planet's past configurations and that new discoveries could alter conclusions.
Continental Drift Theory
Alfred Wegener first proposed the theory of continental drift in the early 20th century. He noticed that the continents appeared to fit together and were once attached in a supercontinent called Pangaea. Wegener provided evidence from matching coastlines, fossil and rock formations, and paleoclimatic data to support his theory. However, he was unable to explain the mechanism of continental drift. Most geologists at the time rejected his theory due to the lack of a clear explanation for how and why the continents would move. It was not until the 1950s when the theory of plate tectonics was developed that Wegener's concept of continental drift became widely accepted.
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Continental Drift
The document discusses evidence that supports the theory of continental drift proposed by Alfred Wegener in 1915. Some of the key evidence includes:
1) The fit of the continents' coastlines and continental shelves suggests the continents were once joined together.
2) Glacial deposits and fossils found in regions that are now tropical provide evidence these areas were once farther from the equator when the continents were in different positions.
3) Certain fossil types found across continents that are now separated by oceans could not have crossed the oceans, indicating the land was once joined.
Evidence... notes
1. Alfred Wegener first proposed the theory of continental drift in 1912, suggesting that the continents were once joined together in a supercontinent called Pangaea and have since moved to their current locations.
2. Evidence such as matching rock formations and fossil distributions across continents supports continental drift. Fossils of the same plants and animals have been found on separated continents.
3. The theory of plate tectonics emerged in the 1950s with the discovery of seafloor spreading at ocean ridges, where new crust is formed and plates move apart, providing a mechanism for continental drift.
Continental drift theory (1)
Alfred Wegener first proposed his theory of continental drift in 1910. He noticed that the continents seemed to fit together like puzzle pieces. Wegener also presented three lines of evidence to support his theory: landforms on different continents matched up, matching plant and animal fossils were found on separated continents, and patterns of past climates did not match the continents' current positions. However, Wegener's theory was initially rejected because he could not explain how or why the continents would move. Wegener believed that evidence from all earth sciences was needed to understand the planet's past configurations and that new discoveries could alter conclusions.
Continental drift
This document discusses the theory of continental drift, including its origins and evidence that supports it. [1] Abraham Ortelius first hypothesized in 1596 that continents drift due to earthquakes and floods. [2] Alfred Wegener formally proposed the theory of continental drift in 1915, suggesting continents were once joined together before breaking apart and drifting to their present locations. [3] Fossil, rock, and glacial evidence from different continents provides support, such as similar plant and animal fossils in South America, Africa, and Antarctica.
Continental Drift Presentation1
This document discusses Alfred Wegener's theory of continental drift and plate tectonics. It provides evidence that supports the idea that the continents were once joined together in a supercontinent called Pangaea, including how the continents fit together, matching fossil and rock formations, and evidence of sea floor spreading from ocean research. Understanding plate tectonics allows geologists to explain landforms, find resources, and predict natural hazards.
The Theory of Pangaea by: Rebecca
The document summarizes Alfred Wegener's theory of Pangaea from 1910, which proposed that all the continents were originally joined together in a supercontinent called Pangaea. It describes how Pangaea broke apart over millions of years, drifting the continents to their current locations. Fossil, geological, and geographical evidence from matching coastlines, mountain ranges, and glacial deposits on different continents supported the theory that they were once joined.
Continental drift
- Alfred Wegener developed the hypothesis of continental drift in 1910, proposing that the continents were once joined together in a supercontinent called Pangaea before drifting apart. This idea is known as continental drift.
- Wegener provided evidence from matching fossil distributions, rock formations, and past climate patterns between continents now separated by oceans that supported his hypothesis of continental movement over time.
- However, Wegener's hypothesis was rejected by most geologists in the early 1900s due to lack of mechanisms to explain continental motion and discrepancies with existing geological theories. It was not widely accepted until new evidence emerged in the 1950s.
Continental drift notes
- Alfred Wegener proposed the theory of continental drift, suggesting that continents had once been joined together in a single landmass called Pangaea before drifting apart. However, he could not provide a satisfactory explanation for the force driving the drift.
- Evidence from matching landforms, fossil distributions, and climate clues in rock strata provided growing support for continental drift, but it took decades for most geologists to accept the theory.
- Convection currents in the Earth's mantle, driven by heat from the core, cause the crust and tectonic plates to slowly move over time, allowing for continental drift. This theory of plate tectonics eventually replaced continental drift as the explanation for drifting continents.
Continental Drift
1) The document discusses Alfred Wegener's theory of continental drift from 1912, which proposed that the continents were once joined together in a single landmass called Pangaea before slowly drifting apart.
2) While Wegener's theory was controversial at the time due to a lack of evidence, it was later proven correct with the discovery of plate tectonics.
3) There is geological evidence that supports the continental drift theory, including matching fossil records, rock formations, mountain ranges, and glacial deposits found across continents.
The pangaea theory
This is a powerpoint showing the Pangaea theory. A theory of the continents once forming a huge super continent before breaking apart. Alfred Weneger, a German scientist, was the one who thought of the continents once existing as one before splitting and breaking apart.
Continental Drift Theory Template
The document discusses the continental drift theory proposed by Alfred Wegener in the early 1900s. It provides evidence that Wegener used to support his theory, including matching landforms between continents, identical fossil finds in separated continents, and plant fossils found in unexpected locations. It also discusses Harry Hess and his theory of sea floor spreading, which helped explain continental drift. Hess proposed that new material is added at mid-ocean ridges, evidenced by older rocks found farther from ridges.
Pangea
The document discusses Alfred Wegener's theory of continental drift from 1912. It explains that Wegener noticed that fossils found in South America were identical to those found in Africa and proposed that the continents were once joined together in a supercontinent called Pangea. The theory described the continents gradually drifting apart over millions of years due to plate tectonics.
Continental Drift Theory by Rajkumar
1. CONTINENTAL DRIFT
“Father” of this theory is Alfred Wegener.
2. The Theory of Continental Drift
Proposed by Alfred Wegener (1912):-
A large super-continent PANGEA split into smaller fragments about 200-300 million years ago. These then drifted apart to form the present arrangement of continents.
Most geologists were highly skeptical and the idea was NOT widely accepted.
3. This is what Wegener thought Pangea looked like 200-300 million years ago.
4. EVIDENCE OF CONTINENTAL DRIFT
Wegener provided four main pieces of evidence to support his theory that the continents had been drifting over time.
5. 1. JIGSAW PUZZLE
Wegener noticed that if we could move present day continents around, several continents look like they would fit together like pieces of a jigsaw puzzle.
6. 2. FOSSILS
Wegener also found fossils of the same plants and animals on different continents now separated by vast oceans. They could only be found this way if the continents had once been joined together.
7. 3. ROCK SEQUENCE
Wegener also found that mountain ranges have a similar sequence of type of rock and age on both sides of the Atlantic Ocean, suggesting they were once part of the same mountain range.
8. 4. GLACIAL SCARS
Wegener found evidence of glacial scars left behind by giant ice sheets from the same time period in Southern Africa, India, Australia and South America.
The white areas were covered by ice and tundra about 300 million years ago (arrows show the direction of ice movement).
the continents were once part of a single larger continent that then split apart, drifting to their present positions over the last 300 million years.
9. WHAT COULD MOVE THE CONTINENTS?
Unfortunately for Wegener, he could not explain what force was powerful enough to move entire continents around the planet.
For reasons was he can't explain
Alfred Wegener died on expedition in Greenland in 1930 still searching for answers to the question of what force could be responsible for the movement of the continents.
10. Reason for Support Continental Drift?
Fit of continents
Apparent discrepancy in inferred latitudes of ancient rocks
Rocks of same age and similar characteristics on different continents
Distribution of similar plants and animals on different continents
11. WEGENERS CONCLUSIONS:
The continents have drifted over the past 300 million
years to their present positions!
(not a very popular idea at the time!!!)
Continental drift and plate tectonics
The document discusses Alfred Wegener's theory of continental drift from 1912 and plate tectonic theory. Continental drift proposed that continents moved and were once joined, explaining geological matches between distant coastlines. However, it did not explain how or why continents moved. Plate tectonic theory improved on this by proposing that the lithosphere is divided into plates which float on the asthenosphere, allowing continents to move by explaining how they drift due to the movement of tectonic plates.
Continental drift theory
The Continental Drift Theory proposes that the continents were once joined together and have since drifted apart. Key evidence for this theory includes:
1) The coastlines of continents on opposite sides of oceans, such as Africa and South America, appear to fit together like puzzle pieces.
2) Certain fossil species, such as Cynognathus, have been found in rock formations on separated continents, indicating the continents were once joined.
3) Mountain ranges and rock formations with the same structure and composition are found on separated continents today.
Theory+of+continental+drift
This document summarizes Alfred Wegener's theory of continental drift, which proposed that the continents were once joined together and have since drifted apart. Wegener noticed that the continents seemed to fit together like puzzle pieces. He gathered evidence from matching landforms, identical fossil distributions, and past climate patterns on separated continents to support his hypothesis of continental movement. While his theory was initially rejected due to lacking an explanation for the driving mechanism of drift, Wegener's extensive evidence helped revive consideration of plate tectonics and continental drift.
9/13/11 and 9/14/11: Continental Drift and Pangaea
Scientists found coconut fossils in Antarctica where it is very cold. This supports the idea of continental drift because it shows that Antarctica used to have a warmer, tropical climate before drifting to its current polar location. The fossil evidence suggests that the continents have moved over time, carrying climates and organisms along with them.
Evidence in support of continental drift
Continental drift is supported by evidence from paleoclimatology, paleoglaciation, fossil correlation, and paleomagnetism. Paleoclimatology shows that coal deposits, which form in tropical areas, exist in high northern latitudes because the continents were once located farther south. Fossil correlation finds matching fossils on separated continents. Paleomagnetism finds that ancient lava flows on separated continents recorded the same magnetic field orientation when the lava solidified, indicating the continents were once joined.
Continental Drift Theory and Plate Tectonic
I am a student of SUST and my subject is "Geography & Environment". Topic of this presentation is " Continental Drift Theory and Plate Tectonic ".
Chapter 14.1: The Continental Drift Hypothesis
8th Grade Integrated Science Chapter 14 Lesson 1 on the Continental Drift Hypothesis. This is a short introduction to Alfred Weger and the current evidence used to support his theory. There is a short explanation of the fossil and rock evidence found.
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9/13/11 and 9/14/11: Continental Drift and Pangaea
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Similar to Continental Drift Theory1
Continental drift theory (1)
Alfred Wegener first proposed his theory of continental drift in 1910. He noticed that the continents seemed to fit together like pieces of a puzzle. Wegener also presented three lines of evidence to support his theory: landforms on different continents matched up, matching plant and animal fossils were found on separated continents, and patterns of past climates did not match the continents' current positions. However, Wegener's theory was initially rejected because he could not explain how or why the continents would move. Wegener believed that evidence from all earth sciences was needed to understand the planet's past configurations and that new discoveries could alter conclusions.
Continental Drift Theory
Alfred Wegener first proposed the theory of continental drift in the early 20th century. He noticed that the continents appeared to fit together and were once attached in a supercontinent called Pangaea. Wegener provided evidence from matching coastlines, fossil and rock formations, and paleoclimatic data to support his theory. However, he was unable to explain the mechanism of continental drift. Most geologists at the time rejected his theory due to the lack of a clear explanation for how and why the continents would move. It was not until the 1950s when the theory of plate tectonics was developed that Wegener's concept of continental drift became widely accepted.
Continental driftnotes
Alfred Wegener first proposed the theory of continental drift in 1915, suggesting that the continents were once joined together in a supercontinent called Pangaea before slowly drifting apart. Wegener provided geological evidence from matching coastlines, fossil distributions, and past climate patterns to support his hypothesis. However, his theory was rejected by most geologists of the time due to the lack of a proposed mechanism for continental movement and challenges to established geological theories. It was not until the 1950s, when new evidence emerged about plate tectonics, that Wegener's hypothesis of continental drift was more widely accepted.
CONTINENTAL DRIFT THEORY PPT
Continental drift is the hypothesis that the Earth's continents have moved over geologic time relative to each other, thus appearing to have "drifted" across the ocean bed.
Wegener argued that there was once a super continent (which he named Pangea -meaning ''all land ) which split up over millions of year and gradually drifted over to their current place on earth at a rate of a few centimeter year.
Continental drift
Alfred Wegener first introduced the theory of continental drift in 1915, which proposed that the continents were once joined together in a supercontinent called Pangaea before slowly drifting apart. Wegener provided two key pieces of evidence to support this theory - the fit of the continental outlines and matching fossil records found on different continents. However, his theory was initially rejected because he could not explain the mechanism of how the continents moved. It is now accepted that the continents sit on tectonic plates that slowly move due to convection currents in the Earth's mantle, providing the explanation Wegener lacked.
Continental Drift
1) Alfred Wegener proposed the theory of continental drift, which suggested that the continents were once joined together in a supercontinent called Pangaea before drifting apart over millions of years.
2) To support his theory, Wegener presented four pieces of evidence: the matching shapes of continental edges, identical fossil distributions, matching rock formations, and evidence of past climate zones that no longer align with the continents' current locations.
3) Despite this evidence, Wegener's contemporaries rejected his theory because he could not explain the mechanism that caused the continents to move. Acceptance of the theory required understanding how and why continental drift occurred.
L3
Alfred Wegener proposed the theory of continental drift, which suggested that the continents were once joined together and have since moved apart. He provided evidence that continents like Africa and South America fit together geographically and share similar fossil and rock patterns. However, his ideas were rejected by other scientists at the time because they could not explain how continents could move through solid rock or what force could cause such movement. It was not until many years later that scientists discovered convection currents in the Earth's mantle caused by radioactive decay in the core, which provided a mechanism for plate tectonics and the movement of continents.
The Theory of Pangaea, by : Rebecca
The document summarizes Alfred Wegener's theory of Pangaea from 1910, which proposed that all the continents were originally joined together in a supercontinent called Pangaea. It describes how Pangaea broke apart over millions of years, drifting the continents to their current locations. Fossil, geological, and geographical evidence from matching coastlines, mountain ranges, and glacial deposits on different continents supported the theory that they were once joined.
The Theory of Pangaea by :Rebecca
The document summarizes Alfred Wegener's theory of Pangaea from 1910, which proposed that all the continents were originally joined together in a supercontinent called Pangaea. It describes how Pangaea broke apart over millions of years, drifting the continents to their current locations. Fossil and geological evidence from matching coastlines, coal deposits, and plant and animal fossils found on separate continents supported the theory that the continents were previously joined.
Continental Drift
1) The document discusses Alfred Wegener's theory of continental drift from 1912, which proposed that the continents were once joined together in a single landmass called Pangaea before drifting apart.
2) While Wegener's theory was controversial at the time due to lack of evidence, it was later proven by evidence of matching fossils, rock formations, mountain ranges, and glacial deposits found across continents.
3) Key evidence includes the way continents fit together like puzzle pieces, matching ancient plant and animal fossils found on continent edges, and identical rock sequences and mountain ranges between continents now separated by oceans.
Continental Drift
1) The document discusses Alfred Wegener's theory of continental drift from 1912, which proposed that the continents were once joined together in a single landmass called Pangaea before slowly drifting apart.
2) While Wegener's theory was controversial at the time due to lack of evidence, it is now widely accepted due to evidence discovered after his death, including matching fossil records, rock formations, and mountain ranges between continents.
3) Key evidence includes the way continents appear to fit together like puzzle pieces, as well as identical fossil plants and animals found on edges of separated continents, supporting the idea that they were once joined.
Continental Drift
1) The document discusses Alfred Wegener's theory of continental drift from 1912, which proposed that the continents were once joined together in a single landmass called Pangaea before slowly drifting apart.
2) While Wegener's theory was controversial at the time due to lack of evidence, it is now widely accepted due to evidence discovered after his death, including matching fossil records, rock formations, and mountain ranges between continents.
3) Key evidence includes the way continents appear to fit together like puzzle pieces, as well as matching plant and animal fossils found on edges of separated continents, supporting the idea that they were once joined.
Integ Sci 10 Lesson 1 [Autosaved].pptx
The document discusses the development of the theory of continental drift by Alfred Wegener in the early 20th century. It provides evidence that supported Wegener's hypothesis, including: the fit of continental coastlines, matching fossil distributions, and correlations between rock and mountain formations on different continents. The theory was initially rejected due to the lack of a proposed mechanism for continental movement, but gained renewed interest after the discovery of apparent polar wander in rock magnetic polarity studies.
A Lfred Wegener
Alfred Wegener was the first scientist to propose the theory of continental drift, which suggests that the continents were once joined together in a supercontinent called Pangaea. He developed this idea after discovering that fossils of the same ancient plant species were found on separate continents. Further evidence for Pangaea and continental drift was that the coastlines of Africa and South America fit together like puzzle pieces. Wegener's theories were controversial at the time but are now widely accepted, making him the founding father of a major scientific revolution in earth sciences.
A Lfred Wegener
Alfred Wegener was the first scientist to propose the theory of continental drift, which suggests that the continents were once joined together in a supercontinent called Pangaea. He developed this idea after discovering that fossils of the same ancient plant species were found on separate continents. Further evidence for Pangaea and continental drift was provided by the matching coastlines of Africa and South America. Wegener's theories were controversial at the time but are now widely accepted, making him the founder of a major scientific revolution in geology.
Day 2 Continental Drift
Scientists found tropical plant fossils like coconut fossils in Antarctica, where the climate is now very cold. This provided evidence that the continents have moved over time, as the same types of fossils are only found in tropical areas currently. Therefore, the continents could not have always been in their current positions.
Pangaea kristen
Alfred Wegener first proposed the theory of continental drift after noticing that the coastlines of South America and Africa seemed to fit together. He hypothesized that long ago, all the continents were joined together in a supercontinent called Pangaea. Wegener gathered evidence from fossil distributions, matching coastlines, and glacial deposits to support his idea that the continents have moved over time due to plate tectonics.
Pangaea.presentation shaina
Alfred Wegner discovered in 1910 that all the continents were once joined together in a supercontinent called Pangaea. He provided evidence from the matching shapes of continental outlines, matching fossil distributions, and matching geological structures between continents now separated by oceans. When he assembled the continents into the configuration of Pangaea, it explained these and other geological matches between separated lands.
Earth Expansion Tectonics - Historical ways of viewing the Earth (Part 3)
“La vida es demasiado corta como para que una persona guarde egoístamente
cualquier nuevo hecho que descubre. Por lo tanto, estoy revelando todo lo que
he aprendido a pesar de que algunos de los datos aún no se han completado del todo.
Muchas mentes piensan mejor que una sola, y es mi ferviente esperanza que a partir
de este inicio se genere más entusiasmo, el cual traerá consigo mentes activas
a este campo de investigación. Los resultados de mi investigación inicial deben amplificarse
y desarrollarse tecnológicamente con el fin de servir mejor a la humanidad.”
MAYNARD MURRAY, M.D.
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Continental Drift Theory1
- 1. Continental Drift Theory No need to take notes I have taken them for you
- 2. Alfred was trying to get his girlfriend’s father to like him. Her father was a well-known geologist!! "Doesn't the east coast of South America fit exactly against the west coast of Africa, as if they had once been joined?" wrote Wegener to his future wife in December 1910. "This is an idea I'll have to pursue."
- 6. The ‘jig-saw’ puzzle Evidence from landforms
- 7. The ‘jig-saw’ puzzle Evidence from landforms
- 8. The ‘jig-saw’ puzzle Evidence from landforms
- 10. fossil matches Evidence from Fossils
- 11. fossil matches Evidence from Fossils
- 13. Antarctic ice Evidence from Climate
- 14. Ice could not have extended this far. So...continents MUST have moved.. Evidence from Climate
- 15. Drift away Continental Drift Theory At first nobody believed Alfred Wegener’s theory….. WHY YOU ASK!
- 16. Scientists still do not appear to understand sufficiently that all earth sciences must contribute evidence toward unveiling the state of our planet in earlier times, and that the truth of the matter can only be reached by combing all this evidence. . . It is only by combing the information furnished by all the earth sciences that we can hope to determine 'truth' here, that is to say, to find the picture that sets out all the known facts in the best arrangement and that therefore has the highest degree of probability. Further, we have to be prepared always for the possibility that each new discovery, no matter what science furnishes it, may modify the conclusions we draw." Alfred Wegener. The Origins of Continents and Oceans (4th edition)