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

Figure 50A

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

EXPLANATION

Probability of penetrating a

aquifer-material interval,

in percent

Well count

≥10

6 to <10

3 to <6

0 to 20

>20 to 40

>40 to 60

>60 to 80

>80 to 100

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 50A. Probability of penetrating at least one aquifer-material interval in lithologic logs from selected confined and unconfined aquifers in Illinois and Indiana in the glaciated conterminous United States.

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior | U.S. Geological Survey
URL: http://pubsdata.usgs.gov/pubs/sir/2018/5091/sir20185091_fig50a.html
Page Contact Information: GS Pubs Web Contact
Page Last Modified: Thursday, 06-Dec-2018 14:45:55 EST