Hunting for Lake Superior agates along the St. Croix River. Eric Benson has been hunting for Lake Superior agates along the St. Croix River for the past seven years. The avid angler searches for ...

Agate hunting on the St. Croix River ... ago when Minnesota was under a lot of volcanoes, all the way up to Lake Superior down to Mille Lacs, and then they were brought dow, and deposited with ...