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Becraft Formation : ウィキペディア英語版 | Becraft Formation
The Becraft Formation is a geologic formation of marine sedimentary rock found in New York State. The Becraft is a part of the lower Devonian Helderberg Group and conformably overlies the New Scotland Formation and is overlain by the Alsen Formation throughout the lower Hudson Valley of New York State.〔 The formation is Gedinnian in age.〔 Outcrops of the formation are found from the New York-New Jersey border to the Helderbergs of Albany County, New York and as far west as Schoharie County, New York. The thickness of the formation varies from around 3 meters in Canajoharie to 8 meters thick in Albany and swells to 27 meters near Kingston.〔 The Becraft Formation is named for Becraft Mountain in western Columbia County, New York where it prominently crops out. == Geology ==
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「Becraft Formation」の詳細全文を読む
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