Calcite

specimen number:
2062937

location:
Lakeside Lavas, St. Louis Co., Minnesota, USA

description:
A semi lustrous translucent cluster of crystals of calcite, this complete all around with no points of attachment. In good condition. Neat locality example for the species. The specimen comes with a previous label from the collection of Ray DeMark.

The Lakeside Lavas consist of a series of fine-grained, pink to dark basaltic and andesitic volcanic flows that formed roughly 1.1 billion years ago during the Keweenawan rifting event along the Midcontinent Rift System. Exposed primarily along the North Shore region in St. Louis County near Duluth, these ancient flows feature vesicular tops containing secondary minerals like quartz, calcite, and zeolites. While the area lacks major commercial mining operations for these specific volcanic units, the rocky outcrops and nearby glacial drift have long served as popular sites for rockhounding, amateur mineral collecting, and geological study of Lake Superior's volcanic heritage.

Questions about this specimen?
Send an email or call us: 314-341-1811.