Volcanoes form as a result of tectonic plate movement and pressure changes below the earth's surface. When magma breaks through the crust, a volcanic eruption occurs, expelling lava, steam, ash and other materials. Mount Vesuvius is a famous volcano near Naples, Italy that formed over 25,000 years ago. Its last eruption in 1944 caused widespread damage, destroying villages and aircraft at a nearby airfield. Volcanic eruptions are powerful natural events that can have significant effects on the surrounding area.
A brief explanation of what a volcano is, its parts, and how it erupts.
Link to Powerpoint presentation with animations:
https://1drv.ms/p/s!AqlgXtwNT9zAgihsvLpaBRIUmINw?e=ThXPlx
A brief explanation of what a volcano is, its parts, and how it erupts.
Link to Powerpoint presentation with animations:
https://1drv.ms/p/s!AqlgXtwNT9zAgihsvLpaBRIUmINw?e=ThXPlx
A fault is a break or fracture between two blocks of rocks in response to stress.
One block has moved relative to the other block.
The surface along which the blocks move is called a fault plane.
Faulting produced the earthquakes.
Thus earthquakes may occur because:
a) Rocks are initially broken to produce a fault.
b) Movement or re-activation of an already existing fault.
Volcanoes and earthquakes education powerpointShubham Saha
This power point is intended to educate you about volcanoes and earthquakes as it is very easy to understand and very descriptive. This can help you in school projects, work purposes or even just for your knowledge. Enjoy....
1.new terms
2.What is a volcano?
3.How and why do volcanoes erupt?
4.Explosive Eruptions
5.Parts of Volcanoes
6. subduction
7.how are they formed
8.volcanic activity levels
9. types of volcanos
10.SHIELD VOLCANO
11. Mt. Kilauea
12.CINDER CONE VOLCANO
13.COMPOSITE VOLCANO
14.Volcanoes around the world
15.Multiple Eruption volcanoes
made by :RATIKA,Delhi,India
what are Volcanism and volcano,
Distribution of Volcanoes
Kinds of Volcanoes
Types of Volcanic Hazards
Preparing for Volcanic Emergencies
A volcano is generally a conical shaped hill or mountain built by accumulations of lava flows, tephra, and volcanic ash. About 95% of active volcanoes occur at the plate subduction zones and at the mid-oceanic ridges. The other 5% occur in areas associated with lithospheric hot spots. These hot spots have no direct relationships with areas of crustal creation or subduction zones. It is believed that hot spots are caused by plumes of rising magma that have their origin within the asthenosphere.
Over the last 2 million years, volcanoes have been depositing lava, tephra, and ash in particular areas of the globe. These areas occur at hot spots, rift zones, and along plate boundaries where tectonic subduction is taking place within the asthenosphere.
The most prevalent kinds of volcanoes on the Earth's surface are the kind which form the "Pacific Rim of Fire". Those are volcanoes which form as a result of subduction of the nearby lithosphere.
A fault is a break or fracture between two blocks of rocks in response to stress.
One block has moved relative to the other block.
The surface along which the blocks move is called a fault plane.
Faulting produced the earthquakes.
Thus earthquakes may occur because:
a) Rocks are initially broken to produce a fault.
b) Movement or re-activation of an already existing fault.
Volcanoes and earthquakes education powerpointShubham Saha
This power point is intended to educate you about volcanoes and earthquakes as it is very easy to understand and very descriptive. This can help you in school projects, work purposes or even just for your knowledge. Enjoy....
1.new terms
2.What is a volcano?
3.How and why do volcanoes erupt?
4.Explosive Eruptions
5.Parts of Volcanoes
6. subduction
7.how are they formed
8.volcanic activity levels
9. types of volcanos
10.SHIELD VOLCANO
11. Mt. Kilauea
12.CINDER CONE VOLCANO
13.COMPOSITE VOLCANO
14.Volcanoes around the world
15.Multiple Eruption volcanoes
made by :RATIKA,Delhi,India
what are Volcanism and volcano,
Distribution of Volcanoes
Kinds of Volcanoes
Types of Volcanic Hazards
Preparing for Volcanic Emergencies
A volcano is generally a conical shaped hill or mountain built by accumulations of lava flows, tephra, and volcanic ash. About 95% of active volcanoes occur at the plate subduction zones and at the mid-oceanic ridges. The other 5% occur in areas associated with lithospheric hot spots. These hot spots have no direct relationships with areas of crustal creation or subduction zones. It is believed that hot spots are caused by plumes of rising magma that have their origin within the asthenosphere.
Over the last 2 million years, volcanoes have been depositing lava, tephra, and ash in particular areas of the globe. These areas occur at hot spots, rift zones, and along plate boundaries where tectonic subduction is taking place within the asthenosphere.
The most prevalent kinds of volcanoes on the Earth's surface are the kind which form the "Pacific Rim of Fire". Those are volcanoes which form as a result of subduction of the nearby lithosphere.
This presentation will help on how to reduce risk, and the precautionary measures that you must do before, during and after if ever a volcanic eruption happens in your place.. :)
Story mode about volcanic eruption preparedness, Philippine setting
credits to Internet and book sources for information and data
Links are broken
(created for a group/school presentation)
This is the notes and slides provided and compiled by teachers from reputable schools. Sharing with you now is this notes!!! Enjoy and love geography!!!
All about Volcanoes (presented by Angel) .pptxSheluMayConde
All About Volcanoes
Volcanoes are remarkable geological structures formed by the eruption of molten rock, ash, and gases from the Earth's mantle. These natural phenomena can shape landscapes, create new landforms, and significantly impact both the environment and human societies. Understanding volcanoes involves exploring their types, formation processes, eruption mechanisms, and effects.
What is a Volcano?
A volcano is an opening in the Earth's crust through which magma, gases, and ash are expelled. When magma reaches the surface, it is called lava. Over time, repeated eruptions can build up a mountain or other landform around the volcanic vent.
Types of Volcanoes:
Shield Volcanoes:
Characteristics: Broad, gently sloping sides formed by the flow of low-viscosity basaltic lava that can travel long distances.
Examples: Mauna Loa and Kilauea in Hawaii.
Composite Volcanoes (Stratovolcanoes):
Characteristics: Steep, conical volcanoes made up of alternating layers of lava, ash, and volcanic debris. They are known for their explosive eruptions.
Examples: Mount Fuji in Japan, Mount St. Helens in the USA, and Mount Vesuvius in Italy.
Cinder Cone Volcanoes:
Characteristics: Small, steep-sided cones built from volcanic fragments such as ash, tephra, and volcanic rocks ejected during eruptions.
Examples: Parícutin in Mexico and Sunset Crater in the USA.
Lava Domes:
Characteristics: Rounded, steep-sided mounds formed by the slow extrusion of viscous lava.
Examples: Mount St. Helens’ Lava Dome in the USA.
Volcanic Features:
Crater:
Description: A bowl-shaped depression at the summit of a volcano, typically formed by explosive eruptions.
Caldera:
Description: A large depression formed when a volcano's summit collapses or is blown away during a massive eruption.
Examples: Yellowstone Caldera in the USA.
Lava Flows:
Description: Streams of molten rock that pour from a volcanic vent and solidify as they cool.
Pyroclastic Flows:
Description: Fast-moving currents of hot gas and volcanic material that can travel down the sides of a volcano during explosive eruptions.
Volcanic Ash:
Description: Fine particles of pulverized rock and glass created during volcanic eruptions that can travel long distances.
Formation of Volcanoes:
Subduction Zones:
Description: Volcanoes often form at convergent plate boundaries where an oceanic plate subducts beneath a continental plate, leading to magma formation.
Examples: The Ring of Fire around the Pacific Ocean.
Rift Zones:
Description: Volcanoes can also form at divergent plate boundaries where tectonic plates are pulling apart, allowing magma to rise.
Examples: Mid-Atlantic Ridge and East African Rift.
Hotspots:
Description: Volcanic activity that occurs away from plate boundaries, caused by plumes of hot material rising from deep within the mantle.
Examples: Hawaiian Islands and Yellowstone.
Earth is the third planet from the Sun and the only object in the Universe known to harbor life. According to radiometric dating and other sources of evidence, Earth formed over 4 billion years ago.[24][25][26] Earth's gravity interacts with other objects in space, especially the Sun and the Moon, Earth's only natural satellite. Earth revolves around the Sun in 365.26 days, a period known as an Earth year. During this time, Earth rotates about its axis about 366.26 times.[n 5]
Earth's axis of rotation is tilted, producing seasonal variations on the planet's surface.[27] The gravitational interaction between the Earth and Moon causes ocean tides, stabilizes the Earth's orientation on its axis, and gradually slows its rotation.[28] Earth is the densest planet in the Solar System and the largest of the four terrestrial planets.
Earth's lithosphere is divided into several rigid tectonic plates that migrate across the surface over periods of many millions of years. About 71% of Earth's surface is covered with water, mostly by oceans.[29] The remaining 29% is land consisting of continents and islands that together have many lakes, rivers and other sources of water that contribute to the hydrosphere. The majority of Earth's polar regions are covered in ice, including the Antarctic ice sheet and the sea ice of the Arctic ice pack. Earth's interior remains active with a solid iron inner core, a liquid outer core that generates the Earth's magnetic field, and a convecting mantle that drives plate tectonics.
Within the first billion years of Earth's history, life appeared in the oceans and began to affect the Earth's atmosphere and surface, leading to the proliferation of aerobic and anaerobic organisms. Some geological evidence indicates that life may have arisen as much as 4.1 billion years ago. Since then, the combination of Earth's distance from the Sun, physical properties, and geological history have allowed life to evolve and thrive.[30][31] In the history of the Earth, biodiversity has gone through long periods of expansion, occasionally punctuated by mass extinction events. Over 99% of all species[32] that ever lived on Earth are extinct.[33][34] Estimates of the number of species on Earth today vary widely;[35][36][37] most species have not been described.[38] Over 7.4 billion humans live on Earth and depend on its biosphere and natural resources for their survival. Humans have developed diverse societies and cultures; politically, the world has about 200 sovereign states.
2. WTH is a Volcano
• A volcano is a vent in the earth’s crust through
which Lava, Steam, ashes and etc. are
expelled.
3. How are they Formed ?
• When tectonic plates collide and go through the process of subduction, it sets the foundation
for a volcano. The overlapping of the tectonic plates causes the magma to break through the
crust, which is the cause of a volcanoes' birth
• Between the molten iron core and the thin crust at the earth’s surface, a solid body of rock lies within.
When temperature and pressure rises, the rock melts and moves through the surface and crust, and
releases gases and magma. This is a description of a volcanic eruption.
4. Mount Vesuvius
• Mt. Vesuvius is located on the west coast of Italy. It overlooks the city of
Naples and sits on the crater of the ancient Somma volcano. Mount
Vesuvius formed over 25,000 years ago. The last eruption of Mt. Vesuvius
was on March 13, 1944. The eruption lasted intermittently till the 18th. Mt.
Vesuvius has an altitude of 1,821 meters. It covers about 480 square km of
land and its lava chamber has a depth of 5-6 km. The diameter of the
mouth is 6 kilometers.
5. Mount Vesuvius Effects
• The eruption caught the military and destroyed the air force planes stationed in
the airport of Terzigho, east of the mountain. An entire wing of 88 B-25 was
damaged by the eruption. There were a few casualties caused by the explosion of
a water tank invested by a lava flow. The major economic losses resulted by the
destruction of the villages S.Sebastiano and Massa, by the Lava flow
6. Sources =)
• How do volcanoes form, slide 2 - http://www.csun.edu/~jao45194/volcano2.html
http://www.ask.com/answers/66941781/how-did-mt-vesuvius-form
• Volcano Pictures, slide 2- http://volcano.oregonstate.edu/tungurahua
http://news.discovery.com/adventure/tags/volcanoes.htm
• What is a volcano, slide 3- http://dictionary.reference.com/browse/volcano
• Volcano Pictures, Slide 3- http://www.enchantedlearning.com/subjects/volcano/
http://heightstechnology.edublogs.org/category/assignments/grade-4/ms-susi/
• Mount Vesuvius, Slide 4- http://geology.com/volcanoes/vesuvius/ http://www.angelfire.com/ct3/anloeb/
http://answers.yahoo.com/question/index?qid=20080102214554AAG4BjD
http://vulcan.fis.uniroma3.it/vesuvio/1944eng_text.html
http://answers.ask.com/Science/Other/how_big_is_mount_vesuvius
Mount Vesuvius pictures, Slide 4- http://camyp2016.edublogs.org/2011/01/26/mount-vesuvius/
http://www.tumblr.com/tagged/mount%20vesuvius
• Mount Vesuvius effects, Slide 5- http://vulcan.fis.uniroma3.it/vesuvio/1944eng_text.html
• Mount Vesuvius effects Pictures, Slide 5- http://symonsez.wordpress.com/2010/03/18/us-army-
meets-its-match-in-world-war-ii/ http://www.warwingsart.com/12thAirForce/Vesuvius.html
