Historical Marker Series

Geological Society of Minnesota

Showing results 1 to 4 of 4
www.historicalmarkerproject.com/markers/HM1G04_geology-of-minnesota-split-rock-region_Two-Harbors-MN.html
Geology of Minnesota Split Rock Region The scenery of the region between Split Rock and Beaver Bay is the direct result of important events of early geologic time. Lava flows, which had accumulated in this region to a thickness of about 30,000 feet, …
www.historicalmarkerproject.com/markers/HM2BHZ_geology-of-minnesota-brainerd-region_-.html
[map of Brainerd Lakes region] Geology of Minnesota Brainerd Region Toward the close of the Wisconsin stage of glaciation about 12,000 years ago, the waning lobe of the ice sheet in the Brainerd area retreated westward, leaving in its wake many stagn…
www.historicalmarkerproject.com/markers/HM2BIF_geology-of-the-lake-mille-lacs-region_Isle-MN.html
GEOLOGY OF THE LAKE MILLE LACS REGION Almost all the lakes in Minnesota were formed by glacial action. Many small lakes formed after the glaciers re-ceded and blocks of ice buried in the sediment melted, leaving holes, called kettles, that filled with wa…
www.historicalmarkerproject.com/markers/HM2BIT_lake-superior-agate_-.html
LAKE SUPERIOR AGATE As you walk the pebbled beaches of the North Shore, watch for translucent, color-banded, and reddish-brown stones called Lake Superior agate--Minnesota's state gemstone. The story of the Lake Superior agate begins 1.1 billion years a…
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