Geography Unfinished

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  • Created by: Harry
  • Created on: 15-05-13 20:59
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  • Rocks and Weathering
    • Geological Timescale
      • Geological Timescale
        • Rocks began to form on the Earth 3800 million years ago when the crust began to cool down and solidify.
        • Periods of rock formation can be shown on a geological timescale. Rocks are continually broken down and re-formed through the rock cycle.
    • Types of Rocks
      • Igneous rocks are formed from molten rock(magma): |Granite-intrusive igneous rock, multi-coloured with coarse texture.|Basalt-extrusive igneous rock, dark colour with fine texture
      • Sedimentary rocks are formed in layers frrom small particles:


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