|
Paleontology in New York refers to paleontological research occurring within or conducted by people from the U.S. state of New York. New York has a very rich fossil record, especially from the Devonian. However, a gap in this record spans most of the Mesozoic and early Cenozoic. Much of New York was covered in seawater during the early part of the Paleozoic era. This sea came to be inhabited by invertebrates like brachiopods, conodonts, eurypterids, jellyfish, and trilobites. Local marine vertebrates included arthrodires, chimaeroids, lobe-finned fishes, and lungfish. By the Devonian the state was home to some of the oldest known forests. The Carboniferous and Permian are missing from the local rock record. Little is known about Mesozoic New York, but during the early part of the era, carnivorous dinosaurs left behind footprints which later fossilized. The early to mid Cenozoic is also mostly absent from the local rock record. However, evidence indicates that during the Ice Age the state was worked over by glaciers, and home to creatures like giant beavers and mammoths. The Silurian sea scorpion ''Eurypterus remipes'' is the New York state fossil. ==Prehistory== New York has a very rich fossil record.〔 Little evidence remains of New York's Precambrian life, although some were preserved in the Adirondack region of the state. New York was covered by a shallow sea during the Late Cambrian.〔 Jellyfish inhabited the state at this time.〔 Other inhabitants of this sea included brachiopods, clams, and trilobites. These groups continued to inhabit this sea into the Ordovician.〔 The terrestrial Ordovician rocks of New York record the process of a coastal plain encroaching westward into an inland sea from a chain of mountains rising along the easternmost edge of North America.〔 Local sea levels had dropped by the ensuing Silurian period. As the sea level lowered the waters covering the western part of the state became shallower and the salt more highly concentrated.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Paleontology in New York」の詳細全文を読む スポンサード リンク
|