Mineral Map of Lake Superior
![Image shows a map if minerals near Lake Superior](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Lake-Superior-map-lgw.jpg?itok=G-BN6lfD)
Detailed Description
Much of the Great Lakes' mineral wealth can be traced to the Mid-Continent Rift. Here is a generalized geologic map of the Midcontinent Rift System. Modified from Dean Peterson, Duluth Metals.
Sources/Usage
Public Domain.
Public Domain