Unit 1A - Types of Rock
- Created by: Ajensen776
- Created on: 07-04-14 16:20
View mindmap
- Types of Rock
- Igneous Rocks
- Intrusive
- These form when magma cools down below the Earth's surface
- The magma cools down very slowly, forming large crystals that give the rocks it's coarse texture
- Large domes of cooled magma are called batholiths
- When magma has flowed into gaps in the surrounding rock it forms
- Dykes in vertical gaps
- Sills in horizontal gaps
- The magma cools down very slowly, forming large crystals that give the rocks it's coarse texture
- Example:Granite
- These form when magma cools down below the Earth's surface
- Extrusive
- These form when magma cools down after it's erupted from a volcano onto the earths surface
- Them magma cools down very quickly, forming small crystals that give the rock it's fine texture
- Example:Basalt
- These form when magma cools down after it's erupted from a volcano onto the earths surface
- Intrusive
- Sedimentary Rocks
- Sedimentary rocks are formed when layers of sediment are compacted together until they become solid rock
- This is called lithification
- Sedimentary rocks are formed when layers of sediment are compacted together until they become solid rock
- Metamorphic Rocks
- Metamorphic rocks are formed when other rocks such as igneous, sedimentary and older metamorphic are changed by heat and pressure
- Igneous Rocks
Comments
No comments have yet been made