Raisin River Oolitic Dolomite

3D Model

Collection: Historic Michigan Geological Survey Outcrop Samples Locality: Monroe County SE7, 7S-9E Franse Stone Co. Qy. No: 2

The Raisin River Dolomite is a geologic formation in Michigan that contains fossils from the Silurian period. The sediments that make up the formation were deposited in a shallow marine environment that covered Michigan 410 million years ago.-Source

Oöids (also known as oölites or oöliths) are sand-size spheres of calcium carbonate mud concentrically laminated about some sort of nucleus grain, perhaps a fossil fragment or a silt-size detrital quartz grain.-Source

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