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Donation and Museum

Posted 7/23/18

An Ordovician Seafloor slab was recently donated by Dennis Kolata to the Galena-Jo Daviess County Historical Society. The slab, delivered by Sam Panno, senior geochemist from the Illinois State Geological Survey, center, is 19 by 11 inches and about an inch or so thick. It was collected from a quarry near Dixon. The slab is from the Mifflin Member of the Platteville Formation, Ordovician in age 485 to 444 million years before present. The slab is full of brachiopods, coral and trilobite fragments. The tooth is a single mammoth tooth found in the Utica area and donated by Panno. Also pictured, Frances Rivoire, historical society board member, left, and Nancy Breed, historical society executive director.

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