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No Precambrian fossils are known from Iowa, so the fossil record does not begin until the Paleozoic. During the early Paleozoic, most of Iowa was submerged by an ancient sea. The bottom of this sea was home to creatures like brachiopods, bryozoans, cephalopods, corals, molluscs, and trilobites. [2]
This list of the Paleozoic life of Iowa contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Iowa and are between 538.8 and 252.17 million years of age.
This list of the prehistoric life of Iowa contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Iowa. Precambrian [ edit ]
The Devonian Fossil Gorge. The Devonian Fossil Gorge, northeast of Iowa City on the banks of the Iowa River, provides a glimpse into the ancient world. Exposed by the floods of 1993 and 2008, the ...
The Winneshiek Shale (originally the Winneshiek Lagerstätte) is a Middle Ordovician (Darriwilian-age) geological formation in Iowa. The formation is restricted to the Decorah crater, an impact crater near Decorah, Iowa. Despite only being discovered in 2005, the Winneshiek Shale is already renowned for the exceptional preservation of its fossils.
In June, a fossil diver found a large section of tusk from a long-extinct mastodon off the Gulf Coast of Florida. Archaeologists at an Iowa creek bed where a 13,600 mastodon skull was found ...
The oldest artifacts found in Iowa are Clovis points, large lanceolate points found occasionally in all parts of the state except for the Des Moines Lobe. Possible sources of game were giant Pleistocene megafauna, including mammoth, mastodon, and giant forms of bison, all of which are now extinct.
Earlier this month, a man in Mississippi found a mammoth tusk, a rarity for the state. And in May, a Florida man discovered a 4-foot mastodon tusk at the bottom of the ocean while searching for ...