By Capt. Paul (Eclogite) on Thursday, April 20, 2006 - 02:30 pm:
In Watersmeet, of course!! ;-) Actually there is a great exposure of it north of Watersmeet off from 45.
I also forgot to mention that there are stromatolites in the Keweenaw as well. Along the shore between Hebards Park and Dan's Point there is a thin white bed of stromatolites in the Copper Harbor Conglomerate. Beware however, most of that shoreline in private but you can pull into any of the public turnoffs along 26 to have a look. If you don't find them right away don't worry, even I have trouble sometimes.....