Deposits of gravel, sand, silt and clay

Deposits of gravel, sand, silt and clay

Detailed Description

These deposits formed from the erosion of the rocks of the Piedmont and were transported and reshaped by gravity and streams. Downtown DC is built on deposits of these materials that have been building up in this area since the geologic period called the Cretaceous (since 80 million years ago!). Materials like these are found throughout the Coastal Plains region.

Details

Image Dimensions: 547 x 410

Date Taken:

Location Taken: US