[EESA06H3] - Final Exam Guide - Ultimate 34 pages long Study Guide!

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Published on 28 Nov 2016
School
UTSC
Department
Environmental Science
Course
EESA06H3
Professor
UTSC
EESA06H3
FINAL EXAM
STUDY GUIDE
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EESA06
READING #2
CHAPTER 2 – PLATE TECTONICS
What are plate tectonics?
Tectonics – the study of the origin and arrangement of the broad structural features of the
earth’s surface including folds, faults, mountain belts, continents, and earthquake belts
Plate Tectonics – the Earth’s surface is divided into a few large, thick plates that move
slowly and change in size; dominates geologic thought because it can explain so many
features
Plate boundaries – plates move away from one another, past one another, or towards one
another; intense geologic activity occurs here
Eight large plates/smaller plates – makes up the outer shell of the Earth (the crust and
upper part of the mantle)
Plate tectonic theory developed by:
Continental drift – continents move freely over the Earth’s surface, changing their
positions relative to one another
Sea floor spreading
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A hypothesis that the sea floor forms at the crest of mid-oceanic ridges, then moves
horizontally away from the ridge crest toward an oceanic trench.
Two sides of the ridge are moving in opposite directions
How did plate tectonics theory evolve?
The Early Case for Continental Drift
Alfred Wegener
Continental drift
Examined continents that have identical late Paleozoic rocks and fossils
Pangea – continents form a giant supercontinent
Laurasia –northern supercontinent (North America)
Gondwanaland – southern supercontinent
Paleoclimatology – study of ancient climate
Distribution of Late Paleozoic glaciation strongly supports the idea of Pangea
Examined ancient sedimentary rocks and discovered that paleoclimatic
reconstructions suggested polar positions very different to those at present
Skepticism about Continental Drift
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Document Summary

Tectonics the study of the origin and arrangement of the broad structural features of the earth"s surface including folds, faults, mountain belts, continents, and earthquake belts. Plate tectonics the earth"s surface is divided into a few large, thick plates that move slowly and change in size; dominates geologic thought because it can explain so many features. Plate boundaries plates move away from one another, past one another, or towards one another; intense geologic activity occurs here. Eight large plates/smaller plates makes up the outer shell of the earth (the crust and upper part of the mantle) Continental drift continents move freely over the earth"s surface, changing their positions relative to one another. A hypothesis that the sea floor forms at the crest of mid-oceanic ridges, then moves horizontally away from the ridge crest toward an oceanic trench. Two sides of the ridge are moving in opposite directions. Examined continents that have identical late paleozoic rocks and fossils.

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