We will now try to repeat this exercise for the Edmonton Riv.pdf

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We will now try to repeat this exercise for the Edmonton River Valley. Notice that the below cross- section (as seen during the River Valley Tour lab) is much more complex than the simple cross section in Question 5. Using all the evidence you have garnered thus far (including previous questions, your constructed cross-section, and the detailed cross section below) complete the account of the geological events that have occurred in the Edmonton River Valley near the University of Alberta. Hint: For the Cretaceous bedrock you'll want to subdivide it into the 3 units we discussed when completing your geological cross section below Edmonton earlier in this lab.Oldest (First event to occur) 1. 2. Belly River Formation deposited Bearpaw Formation deposited 3. Horshoe Canyon Formation deposited Empress Formation deposited! 4. Till deposited Glacial Lake Edmonton deposits deposited Sand dunes deposited Mazama Ash deposited 11000 year old river terraces deposited 6. 8000 year old river terraces deposited Erosion (unconformity) 7. Landsliding 8. 9. 10. 11. 12. Youngest (Last event to occur).

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Take Test: Unit IV Assessment Top of Form QUESTION 1 1. Recall from your reading about the principle types of volcanoes to choose the best answer: Crater Lake, a caldera, formed from the collapse of a __________. 2. composite volcano. shield volcano. cinder volcano. lava dome QUESTION 2 1. According to the radiometric time scale reading, which of the following describes radioactive decay? 2. The number of protons remains the same, but the number of neutrons varies The number of neutrons remains the same, but the number of protons varies The mass number of the daughter isotope is one more than the parent and both isotopes have the same atomic number The daughter isotope has an atomic number two less than the parent and a mass number four less QUESTION 3 1. Refer to the following relative time scale diagram to answer the question: which period represents the longest subdivision of the geologic time. Precambrian Eocene Carboniferous Mississippian QUESTION 4 1. Mt. Rainier in Washington State is an excellent example of what principle type of volcano? 2. An eroded shield volcano A caldera A stratovolcano Flood basalts QUESTION 5 1. Recall from your reading about the nature of volcanoes to choose the best answer: A volcanic eruption is driven by __________ and __________ which forces its way upward and may ultimately break though zones of weaknesses in the Earth's crust. 2. heat; water pressure heat; gas pressure buoyancy; gas pressure buoyancy; water pressure QUESTION 6 1. Recall your reading of Relative Time Scale and Radiometric Time Scale and match the term with the definition. - A. B. C. D. E. F. G. H. Isotopes - A. B. C. D. E. F. G. H. Half-life - A. B. C. D. E. F. G. H. Carbon 14 - A. B. C. D. E. F. G. H. Igneous rocks - A. B. C. D. E. F. G. H. Hutton - A. B. C. D. E. F. G. H. Petrology - A. B. C. D. E. F. G. H. Index fossil - A. B. C. D. E. F. G. H. Stratigraphy A. Rocks that generally do not contain fossils B. Forms of life which existed during limited periods of geologic time and thus are used as guides to the age of the rocks in which they are preserved C. Studies of rock layering D. The time it takes for one-half of a particular radioactive isotope.

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Question 1 1. Recall from your reading about the nature of volcanoes to choose the best answer: A volcanic eruption is driven by __________ and __________ which forces its way upward and may ultimately break though zones of weaknesses in the Earth's crust. heat; water pressure heat; gas pressure buoyancy; gas pressure buoyancy; water pressure 2 points Question 2 1. Recall from your reading about the nature of volcanoes to choose the best answer: Which type of basaltic lava flow has a fairly smooth, unfragmented, ropy surface? Aa Pahoehoe Pumice Scoria 2 points Question 3 1. Recall from your reading about the nature of volcanoes to choose the best answer: Magma tends to rise toward Earth's surface principally because __________. of magma cooling mounting pressure within the reservoir rocks become more dense when they melt of convection in the mantle 2 points Question 4 1. Recall from your reading about the principle types of volcanoes to choose the best answer: Crater Lake, a caldera, formed from the collapse of a __________. composite volcano. shield volcano. cinder volcano. lava dome 2 points Question 5 1. Due to the nature of volcanoes the violent separation of gas from lava forms __________. dikes craters cinders pumice 2 points Question 6 1. Recall your reading of Relative Time Scale and Radiometric Time Scale and match the term with the definition. Isotopes Half-life Carbon 14 Igneous rocks Hutton Petrology Index fossil Stratigraphy A. Atoms of the same element with differing atomic weights B. Rocks that generally do not contain fossils C. The Scottish geologist who first proposed the fundamental principle used to classify rocks according to their relative ages D. Forms of life which existed during limited periods of geologic time and thus are used as guides to the age of the rocks in which they are preserved E. Studies on the origins of the various kinds of rocks F. The time it takes for one-half of a particular radioactive isotope in a sample to decay G. Studies of rock layering H. Isotope found in all living plants and animals 8 points Question 7 1. Recall from your reading of Principal Types of Volcanoes, and match the description to the type of volcano. Large, fairly steep-sided cones composed of alternating layers of lava flows and pyroclastic material. Small basaltic cones built during one, short, eruptive episode; dominated by cinders. Volcanoes of southwestern Alaska and the Aleutian Islands. Big volcanoes of Hawaii Volcano Paricutin in Mexico Forms dikes from lava Lava is produced after the eruption and flows from the bottom Volcanoes with gentle slopes spreading over large areas A. Shield volcanoes B. Cinder cones C. Composite/stratovolcanoes 8 points Question 8 1. Recall from your reading about the radiometric time scale to put the following isotopes in order of use, from oldest rock to youngest. Carbon-14 Potassium-40 Samarium ...

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