The 3 Types of Rock
- Created by: katie__hyde
- Created on: 10-10-13 19:06
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- Rocks, Resources and Landscapes
- Types of Rock
- Sedimentary
- Made of Sediment
- Always form in water
- Made by
- Cementing 'clasts' (fragments)
- Clasts can be as small as mud or as big as pebbles
- Derived by weathering and erosion
- Clasts carried down to sea by wind or rivers.
- Once sediment arrives in sea, it settles on sea bed and is compacted by the weight of material that is deposited on top if it
- As material is laid down in layers, bedding planes and faults develop
- Makes rock open up more to weathering and erosion
- As material is laid down in layers, bedding planes and faults develop
- Cementing 'clasts' (fragments)
- For Example
- Clay
- Mud sediments
- Chalk and Limestone
- Calcium Carbonate
- This is found in shells of sea creatures, who die and decay on the floor
- Calcium Carbonate
- Sandstone
- Untitled
- Clay
- Igneous
- 2 Types
- Intrusive
- Formed Underground
- Cooling and Crystallisation of magma (molten rock), deep underground
- Crystals grow as magma cools
- Slower the cooling, the bigger the crystals, resulting in a coarse grain rock
- Magma cools quicker nearer the earth surface, as temperatures here are cooler
- This gives a fine grain rock
- Magma cools quicker nearer the earth surface, as temperatures here are cooler
- Slower the cooling, the bigger the crystals, resulting in a coarse grain rock
- Crystals grow as magma cools
- Extrusive
- Formed on the surface
- Form where magma has erupted onto the surface
- It cools quickly to form a rock with very small crystals (a lava flow)
- Lava is usually darker in colour and may have some gas holes in it
- It cools quickly to form a rock with very small crystals (a lava flow)
- Intrusive
- 2 Types
- Sedimentary
- Metamorphic
- Formed
- Rocks (Sedimentary or Igneous) that have been altered
- By heat
- Or both
- Transforming them into denser, more compacted rocks.
- Sometimes new crystals grow from the old minerals which get rearranged
- Transforming them into denser, more compacted rocks.
- Or both
- Or pressure
- Or both
- Transforming them into denser, more compacted rocks.
- Sometimes new crystals grow from the old minerals which get rearranged
- Transforming them into denser, more compacted rocks.
- Or both
- By heat
- Rocks (Sedimentary or Igneous) that have been altered
- If altered by pressure
- It is likely to show some layers of 'foliation'
- E.G. Slate
- It is likely to show some layers of 'foliation'
- If altered by heat
- E.G. Being next to a magma chamber
- It can have a sugary texture
- E.G. Marble
- Form on plate margins
- Formed
- Types of Rock
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