Geology of the glaciated region of the US
Detailed Description
In recent geologic history, glaciers covered a large area of the northern part of what is today the US and Canada. As they pass over the land they erode the bedrock and as they retreat, leave behind large glacial deposits such as sediments, moraines and boulders. Scroll between these two images to view the differences in the geology of the glaciated region of the United States.
Sources/Usage
Public Domain.
Source data for this representation were obtained from the Cooperative National Geologic Map (https://ngmdb.usgs.gov/nationalgeology/) available from the National Geologic Map Database (https://ngmdb.usgs.gov/ngmdb/ngmdb_home.html).