|
|
|
|
|
Basic Information |
|
|
|
|
|
|
|
|
|
|
|
|
|
Physical Environment > Crust |
|
This site tells the story of the history of the universe. Click Earlier and Later to follow the story. Note: Many facts have been simplified to make them easier to understand. |
|
The crust of the Earth is a thin rigid layer of rock. It floats on the mantle.
It is made mostly of a layer of dark rock called basalt 5-10 km thick. The oceans lie above this layer. Trapped in this basalt are lumps of thicker rock similar to granite 30 - 40 km thick. These lumps stick out of the oceans to form the continents. |
|
| Like this web site? Buy the book! |
|
Physical Environment > Crust |
|
|
Basic Information |
|
|
|
|
|
|
|
|
|
|
|
|
|
