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Summary Rocks and Weathering - Plate Tectonics $3.23   Add to cart
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Summary Rocks and Weathering - Plate Tectonics
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  • Course
  • Unit 1 - Core Geography (9696)
  • Institution
  • CIE
  • Book
  • Cambridge International AS and A Level Geography second edition

This document includes detailed explanations of the processes associated with plate tectonics, including diagrams and a Case Study. This corresponds to CIE AS level Geography.

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Document information

  • No
  • Chapter 3.1
  • March 12, 2021
  • 9
  • 2019/2020
  • Summary

Subjects

  • geography
  • physical
  • plate
  • tectonics
  • boundary
  • process
  • movement
  • ridges
  • andes

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  • Unit 1 - Core Geography (9696)
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Content preview

The Earth's interior




Earth is made up of many layers:
- layers become more dense when the depth increases.
- density is controlled by temperature and pressure - temperature
softens or melts rocks.

Surface:
- rocks are mainly solid and brittle.
- upper surface layer is the lithosphere: crust + upper mantle --->
70 km deep.
● crust: continental crust and oceanic crust.
➢ continental crust - silica and aluminium are common,
granitic rock.
➢ oceanic crust - basaltic rock with some silica; iron and
magnesium common.




<--- Pangea

, Evidence for plate tectonics and their global
patterns

- the past + present distribution of earthquakes
- changes in the Earth's magnetic field where tectonic activity has
taken place.
- the fit of continents.
- glacial deposits in Brazil match those in West Africa - they used to
be together.
- fossil remains in India match those in Australia.

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