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A Sea without Fish: Life in the Ordovician Sea of the by Richard Arnold Davis,David L. Meyer

By Richard Arnold Davis,David L. Meyer

The zone round Cincinnati, Ohio, is understood through the international for the ample and lovely fossils present in limestones and shales that have been deposited as sediments at the sea ground in the course of the Ordovician interval, approximately 450 million years ago—some 250 million years prior to the dinosaurs lived. In Ordovician time, the shallow sea that lined a lot of what's now the North American continent teemed with marine existence. The Cincinnati region has yielded the various world's such a lot ample and best-preserved fossils of invertebrate animals similar to trilobites, bryozoans, brachiopods, molluscs, echinoderms, and graptolites. So well-known are the Ordovician fossils and rocks of the Cincinnati zone that geologists use the time period "Cincinnatian" for strata of an identical age everywhere North the USA. This booklet synthesizes greater than one hundred fifty years of study in this fossil treasure-trove, describing and illustrating the fossils, the lifestyles conduct of the animals represented, their groups, and residing relations, in addition to the character of the rock strata within which they're chanced on and the environmental stipulations of the traditional sea.

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