Types of Rock

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  • Created by: Ash
  • Created on: 13-04-13 10:02
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  • Types of Rock
    • Igneous
      • Extrusive
        • When magma is cooled after a volcano eruption.
        • Small Crystals
        • Fine Texture
      • Intrusive
        • Magma cools down below Earths surface
        • Large Crystals
        • Coarse Texture
        • Large domes formed called batholiths
        • Gaps in the surrounding rocks form dykes and sills
    • Sedimentary
      • Layers of sediment compacted together.
        • Lithification
      • Carboniferous Limestone and Chalk - tiny shells and skeletons on the sea bed.
      • Clays and Shales - mud and clay minerals - deposited in layers.
    • Metamorphic
      • Other rocks are changed by heat and pressure
        • Change by the weight and pressure above them.
        • When tectonic plates collide - cause heat and pressure.
        • Magma heats the rocks.
      • Harder
      • More Compact
      • Marble       Slate

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