Cambrian-Ordovician aquifer system
![Map showing the Cambrian-Ordovician aquifer system](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_camord-pam.gif?itok=xDh6Nn-n)
Detailed Description
The Cambrian-Ordovician aquifer system is a complex multi-aquifer system with individual aquifers separated by leaky confining units. The aquifer system is under stress from extensive ground-water withdrawals in southeastern Wisconsin, much of Iowa, and especially in the Chicago, Illinois area.
Sources/Usage
Public Domain.