NORTH CAROLINA: Chatham Co; White Pines Preserve - June 2019
ILLINOIS: Hancock Co; Hamilton, Jacob's Geodes mine - July 2016
WISCONSIN: Jackson Co; Black River State Forest, Castle Mound Campground - July 2016
MICHIGAN: Houghton Co; East Branch Ontonogan River at Lake 13 Rd - June 2016
MASSACHUSETTS: Middlesex Co; Carlisle, Cranberry Bog - May 2016
MAINE: Oxford Co; White Mountains, Hastings Campground - July 2012
NEW YORK: Onieda Co; Delta Lake State Park - July 2012
OKLAHOMA: LeFlore Co; Ouachita National Forest, Winding Stair Campground - July 2012
MINNESOTA: Cook Co; Superior National Forest - August 2010
MINNESOTA: Kandiyohi Co; Sibley State Park - August 2010
IOWA: Madison Co; Pammell State Park - August 2010
KENTUCKY: Wolfe County - June 2008
KENTUCKY: McCreary County - June 2008
VIRGINIA: Washington County - June 2008
OKLAHOMA: LeFlore County - June 2007