Geology in Michigan

Wisconsin is fine as far as being a nice state to live in, blah blah blah.  But I gotta admit, Michigan has it all over us when it comes to geology.  Here is a geological map of Wisconsin:

From Autumn 1967 issue of Wisconsin Tales and Trails magazine, page 28

  

Wisconsin is a geological dome.  In a geological dome the youngest rocks are on the outside diameter and the oldest rocks are in the center.  For example in Wisconsin the Milwaukee formation has the fossils - almost everywhere else is OLD.

But Michigan is a basin:

The youngest rocks are in the middle (Jur => Jurassic) and the older rocks are the outside rings.  So Michigan's got fossils (as well as hydrocarbons) !

One video I saw a while back by Alexis Dahl was on a big underground salt mine in the Detroit area, an amazing video, who knew ?:

source: https://www.youtube.com/watch?v=ViFl7qWQF5U

Another video which I saw just today from Scishow but featuring Alexis Dahl was on copper in the Upper Peninsula of Michigan - again amazing, who knew that the copper up there was so pure ?:

source: https://www.youtube.com/watch?v=lf7cKSFCeag

Geology was always one of my favorite subjects - it seems to attract really positive people like Alexis Dahl or Myron Cook, who was mentioned before:

https://wb9kzy.blogspot.com/2025/07/enthusiasm.html

 Best Regards,
Chuck, WB9KZY
http://wb9kzy.com/ham.htm