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EESA06H3- Final Exam Guide - Comprehensive Notes for the exam ( 23 pages long!)Premium


Department
Environmental Science
Course Code
EESA06H3
Professor
Nick Eyles
Study Guide
Final

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UTSC
EESA06H3
Final EXAM
STUDY GUIDE

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EESA06 Lecture 2 ( winter 2018)
How Planet Earth Evolves: Continental Drifts vs. Plate Tectonics:
Key points to remember:
Formation of planet earth: 4,500 million years before present
Continental drift and Pangea: 1912 (Alfred Wegener)
Sea floor spreading: 1962 (Harold Hess)
Magnetic stripes on the ocean floor and wander path for continents: 1965 (Fred Vine)
Mid-ocean ridges and hot spots: 1965 (Tuzo Wilson)
Computer reconstruction of Pangea by Edward Bullard (1965)
Plate tectonics and Wilson cycle of supercontinents: 1967 (Tuzo Wilson); called a
revolution in earth science
Pangea:
How Pangea was re-assembled
- Mercantilism: is global trade using maps of what the earth looked like. This begun in the
early 17th century.
- Francis Bacon (1561 1620) looked at these maps and thought that some of the
continents could connect to become a supercontinent.
- Alfred Wegner was a meteorologist and was inspired by Francis Bacon.
Most geologists rejected his theory, however he started to reassemble Pangea by matching
rock types of the same age from one continent to another.
He looked at the distribution of rocks that contain salt, salt is the product of evaporation
since the amount of water that evaporates is greater than the amount of rainfall.
Rock types: are memories of ancient environments. The nature of the rocks reflects the
environment in which they were deposited. For example, igneous rocks deposited by
volcanoes.
Three types of rocks: igneous, sedimentary (made by sediments), and metamorphic
(subject to change by heat and pressure).
Then took those types up rocks and realized there to be a pattern (diagrams are
provided on the slides
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Another point was deep scratches in rocks because of glaciers
This evidence was accepted in the southern hemisphere
He looked at fossil records and saw where these fossils occurred and created the same
pattern
Striations(Striations means a series of ridges, furrows or linear marks, and is used in
several ways) on the ground...scratches indicating the movement of ice across the
surface.
He proposed that the continents moved by plowing through the sea floor. He called this
concept, continental drift
There were two main parts of Pangea
- Laurasia: North America and Asia
- Gondwana: Southern Continents
Things to know:
- Salt deposits rocks comes from, tropical places
- Trench: deep water and associates with subduction zone
- Bathymetry: the depth of something
- Glacier erratic boulders: are the boulders that moved from their original destination and
path. For example, the ice sheets and boulders from Labrador have moved to Toronto.
- Mid ocean ridges
- Transform fobs
- The whole earth is circled by linear volcano ridges
- There was still biological community
- Eer  eters deeper do to earth’s etre there is a .5 degree temperature
increase
- Super heated water scavenging mineral
- Pacific rem of fire - all the disaster happen
- Earthquake identify plate boundaries
- Maritime rocks originate from Africa
Mid ocean ridge rocks are rich in minerals
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