Reading a little book put out years ago by the Potsdam Museum, I learn that there were two sandstone quarries of Potsdam, and several more up and down on both sides of the Raquette River. The two quarries were flooded in 1922 when a dam above Sugar Island was built. Geologists named the stone Potsdam because it was first quarried in Potsdam and geologists went to Potsdam to study the rock between 1838 and 1842. The Upper Cambrian which underlies a large portion of the US is known to geologists as the Potsdamian.
The Potsdamian is only exposed close enough to be quarried in a few locations in North America because of the depth of the Cambrian. It's also prominent in localities of the Upper Peninsula of Michigan which have a close resemblance to the Village of Potsdam. Marquette Michigan is a beautiful old sandstone town along Lake Superior and is also a university town.
Thursday, January 31, 2008
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