By Richard Arnold Davis,David L. Meyer
The sector round Cincinnati, Ohio, is understood through the international for the plentiful and gorgeous fossils present in limestones and shales that have been deposited as sediments at the sea flooring throughout the Ordovician interval, approximately 450 million years ago—some 250 million years ahead of the dinosaurs lived. In Ordovician time, the shallow sea that coated a lot of what's now the North American continent teemed with marine existence. The Cincinnati sector has yielded a few of the world's such a lot considerable and best-preserved fossils of invertebrate animals comparable to trilobites, bryozoans, brachiopods, molluscs, echinoderms, and graptolites. So well-known are the Ordovician fossils and rocks of the Cincinnati sector that geologists use the time period "Cincinnatian" for strata of a similar age everywhere North the US. This publication synthesizes greater than one hundred fifty years of study in this fossil treasure-trove, describing and illustrating the fossils, the lifestyles behavior of the animals represented, their groups, and residing kin, in addition to the character of the rock strata during which they're came upon and the environmental stipulations of the traditional sea.
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Extra info for A Sea without Fish: Life in the Ordovician Sea of the Cincinnati Region (Life of the Past)
A Sea without Fish: Life in the Ordovician Sea of the Cincinnati Region (Life of the Past) by Richard Arnold Davis,David L. Meyer