Plate tectonics notes

brief introduction to plate tectonics and the types of crust, also intro on plate tectonics theory 

HideShow resource information
Preview of Plate tectonics notes

First 152 words of the document:

Plate tectonics
Structure of the earth
Divided into 3 layers
The core
The mantle
The crust
The core
Densest part
Made of rocks rich in iron and nickel
Semi-molten outer core
Solid inner core- temperatures over 6000c
Layers from crust to core
Mohorovicic discontinuity
Gutenburg discontinuity
The mantle
Semi molten
Apart from more rigid upper mantle near crust
Vicious, weak and ductile region of the upper mantle of the earth
Ductile- easily deformed
The crust
Thinnest part
Coolest and least dense
Rocks rich in silicon, oxygen, aluminium
Oceanic crust
Mainly Baltic in nature
6-10 km thick
Continental crust
Composed of igneous, metamorphic and sedimentary rocks
70 km thick
The crust is separated from the mantle by the Mohorivijic discontinuity

Other pages in this set

Page 2

Preview of page 2

Here's a taster:

Plate tectonics theory
Alfred Wenger suggested the continents were once all joined together in an ancient
supercontinent he called Pangea. At some point the land masses had drifted apart until they
occupied their current positions on the globe
Evidence for this...
o Continental fit- some continents (Western Africa and South America) seem to fit
together if placed beside each other.…read more


No comments have yet been made

Similar Geography resources:

See all Geography resources »See all resources »