Interesting conglomerate
This is a really awesome rock found in Michigan and around the northern Great Lakes area. It began as a sandstone conglomerate with pieces of chert including the varieties flint and jasper (black and red pieces). The glaciers picked them up moving south through Canada and dropped them on the NE side of Michigan. The Michiganders call them pudding stones. The coarse sands from the sandstone were metamorphosed to a smooth quartzite. They classified as both sedimentary and metamorphic. I give them to my first year geology students to classify and it really confuses them lol.
