Chert with jasper, Lake Michigans Left Coast, a blog by Elizabeth Fagan

Banded Chert

I am not sure what to call this piece of chert with jasper bands other than "banded chert." It is one of the many rocks of mysterious origin I find on the Lake Michigan coast of Ozaukee County, Wisconsin. Copyright, Disclaimer, Bibliography

Chert

Hurricane Sandy ("Superstorm Sandy") kicked up 23-foot waves on Lake Michigan off Chicago in late October, 2012. Afterward, lots and lots of sharp-cornered and beautifully caramel-colored chert appeared on Montrose Dog Beach. Here are some Hurricane Sandy souvenirs. Copyright, Disclaimer, Bibliography