Types of Rock
- Created by: Ash
- Created on: 13-04-13 10:02
View mindmap
- 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
- Extrusive
- 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.
- Layers of sediment compacted together.
- 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
- Other rocks are changed by heat and pressure
- Igneous
Comments
No comments have yet been made