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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 Red Gulch Dinosaur Tracksite ： ウィキペディア英語版 Red Gulch Dinosaur Tracksite Red Gulch Dinosaur Tracksite is an assemblage of fossil dinosaur footprints on public land near Shell, in Big Horn County, Wyoming.〔(BLM: Red Gulch Dinosaur Tracksite )〕 They were discovered in 1997 by Erik P. Kvale, a research geologist from the Indiana Geological Survey.〔(Indiana.edu: Erik P. Kvale )〕 The site is managed by the Bureau of Land Management as part of the Red Gulch/Alkali National Back Country Byway and is open to the public.〔 ==Fossils== The fossilized tracks are believed to have been made during the Middle Jurassic Period, 160-180 million years b.p., on what was then a shore of the Sundance Sea.〔N.H. Darton, Jurassic formations of the Black Hills of South Dakota, ''Geological Society of America Bulletin'', v.10, p. 383-396 (1899).〕 Theropod tracks are thought to be among those discovered, but evidence suggests that the tracks were made by a large, diverse group of dinosaurs.〔(Emory.edu: Red Gulch Dinosaur Tracksite; by Chamberlain, C. Kent ).〕〔(Nature.nps.gov: B. Breithaupt et al., Innovative documentation methodologies in the study of the most extensive dinosaur tracksite in Wyoming )〕 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「Red Gulch Dinosaur Tracksite」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.