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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Hsanda Gol Formation ： ウィキペディア英語版 Hsanda Gol Formation The Hsanda Gol Formation is a geological formation dating from the Oligocene, located in Central Mongolia in the Tsagan Nor basin. The fossilised animals are mostly Middle Oligocene mammals, with an abundance of rodents.〔''Fossil Mammals from the Oligocene Hsanda Gol Formation, Mongolia: With Notes on the Paleobiology of Cricetops Dormitor. Insectivora, rodentia and deltatheridia, Part 1'', James Silvan Mellett, 1966〕〔(The Oligocene Hsanda Gol Formation, Mongolia : a revised faunal list )〕 == Geology == The 2600 feet thick Hsanda Gol formation is covered in various places by Miocene-age variegated clays, sands, and gravels. It rests on top of the Early Cretaceous Hühteeg Svita formation. The lower portions of the formation are composed of yellow conglomerate, with the higher areas being dominated by red clays, silts and sands, as well as lava and basalt flows. During the Oligocene, the area is believed to have been a sparse plain with few wooded areas, due to the absence of large herbivores (with the exception of ''Paraceratherium'', which is known from the formation).〔(The Oligocene Hsanda Gol Formation, Mongolia : a revised faunal list )〕 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「Hsanda Gol Formation」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.