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Southeastern Ohio was a swamp-covered coastal plain. [4] Ferns and horsetails were among the state's rich flora. [3] Ohio was only about 5 degrees north of the equator. Sand and mud deposited on local river deltas gradually filled in the swamp. Later in the Permian Ohio was subjected to geologic uplift and its sediments were eroded away ...
The cephalopods have a long geological history, with the first nautiloids found in late Cambrian strata. [1]The class developed during the middle Cambrian, and underwent pulses of diversification during the Ordovician period [2] to become diverse and dominant in the Paleozoic and Mesozoic seas.
Cephalopods are thought to be unable to live in fresh water due to multiple biochemical constraints, and in their >400 million year existence have never ventured into fully freshwater habitats. [10] Cephalopods occupy most of the depth of the ocean, from the abyssal plains to the sea surface, and have also been found in the hadal zone. [11]
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Cephalopods of North America — a primarily prehistoric class of Molluscs in North America. With some extant/surviving Holocene/present day species. Subcategories.
Ohio skies are filled this time of year with hundreds of species of birds flying north for the summer.. The height of the spring migration — known as The Biggest Week in American Birding — is ...
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