Geography Unfinished
- 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.
- Geological Timescale
- 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:
- Geological Timescale
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