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Daily Archives: September 5, 2014
Wooster’s Fossils of the Week: A hardground with rugose corals from the Upper Ordovician of southern Ohio
The above slab is a carbonate hardground from the Liberty Formation (Upper Ordovician) of southern Ohio. Carbonate hardgrounds are cemented seafloors, so we’re actually looking at the hard rocky bottom of an Ordovician sea. I’ve long found the idea of … Continue reading