« 162 Rocks that glow

162 Rocks that glow

Waves on Lake Superior have worn the old rocks down and polished them so that they glow in the setting sun. Glaciers exposed these ancient basalt lava flows on the Canadian side as well as the presence of microfossils called Stromatolites, which are 1.9 to 2.3 billion years in age. This sample of the Canadian Shield is on Lake Superior at Twilight Resort near Wawa, Ontario, Canada.

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