R Lesson 2 Revision - Locations and Risk: Tectonic Movement
- Created by: LouisNunn111
- Created on: 20-09-17 20:40
View mindmap
- Tectonic Movement
- Crusts
- Thin oceanic crust composed of mainly basalt.
- Thicker continental crust composed mainly of granite.
- Rocks in Mantle
- Upper mantle rock is brittle enough to break under stress - earthquakes.
- Lower mantle rock is plastic and flows when subjected to forces, instead of breaking.
- Convection Currents
- Heat derived from the core rises in mantle to drive convection currents - moves tectonic plates.
- Sea Floor Spreading
- Divergent boundaries under ocean
- Continuous input of magma forming 'mid-ocean ridges'
- MID-ATLANTIC RIDGE
- On land - 'rift Valleys' form
- Methods of movement
- Convection Currents
- Slab Pull
- Benioff Zone
- Intermediate/deep focus
- A zone in which many deep earthquakes occur
- Situated beneath a destructive boundary where oceanic crust is subducting
- Crusts
Similar Geography resources:
Teacher recommended
Comments
No comments have yet been made