USGS Scientific Investigations Report 2018-5091: Characterization and Occurrence of Confined and Unconfined Aquifers in Quaternary Sediments in the Glaciated Conterminous United States

Select radio button to display desired data overlay. Use slider to control base map opacity.
For best results use Google Chrome.

EXPLANATION

Hydrogeologic
terrane and
identifier

Hydrogeologic terrane boundaries—Alphanumeric code indicates the generalized complexity of the hydrogeologic framework in each terrane

Sediment thickness contrast

Major river

Maximum extent of glacial ice

Extent of Late Wisconsinan ice

Figure 1A. Hydrogeologic terranes and the maximum glacial advance in the glaciated conterminous United States.

U.S. Department of the Interior | U.S. Geological Survey
URL: http://pubsdata.usgs.gov/pubs/sir/2018/5091/sir20185091_fig01a.html
Page Contact Information: GS Pubs Web Contact
Page Last Modified: Thursday, 06-Dec-2018 14:40:07 EST