US & North American Maps of Different Earth Systems
US & North American Maps of Different Earth Systems
A Tapestry of Time and Terrain
Saturday, September 19, 2009
Source: United States Geological Survey (USGS), available for download or purchase as a poster at the USGS Store. Click on the map to go directly to the original image. The Tapestry of Time and Terrain for all of North America is also available from the USGS.
The color scheme for the VFE Database revision will be based upon the International Stratigraphic Chart from the International Council on Stratigraphy. That chart is shown below in a reduced size. Click on the chart to download the pdf.