2009.3.27

1.Plateau高原
3.valley流域
5.Fertile肥沃

2.This is the Appalachian plateau, and its beautiful scenery, which the city of highland area。

4.Not all plants can be grown on the plateau.

6.Generally at around the basin have a dense forest, has a more humid land.

7.Sandstone is one of the most common sedimentary rocks. It is made from sand grains eroded from older rocks, cemented together and then hardened into new rock. Here we see a picture of a Jurassic sandstone from the USA, notice the layers. Each layer is a record of an event in the past.

8.sedimentary rock：Sedimentary rocks at the earth's crust are the surface conditions, from rock weathering product of volcanic material, organic material such as sedimentary rocks of the original material composition, as for transportation, deposition and after deposition of the role of one type of rock formation.