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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 McKinney Falls State Park ： ウィキペディア英語版 McKinney Falls State Park McKinney Falls State Park is a state park located at the southeastern edge of Austin, Texas, United States around the confluence of Onion and Williamson Creeks and is administered by the Texas Parks and Wildlife Department. The park opened on April 15, 1976 and is named after Thomas F. McKinney, a businessman, race horse breeder and rancher, who owned and lived on the land in the mid-to-late 19th century. ==Pre-history== During the Cretaceous Period, much of Texas was covered by a shallow sea. The sediments deposited during this period lithified into the limestone rock underneath the park's soil and was exposed by erosion around the creek bed. Aquatic reptiles swam in the sea as evidenced by a complete skeleton of a mosasaur found in the rocks of Onion Creek not far from the park.〔Raney, Jay A. ''Down to Earth at McKinney Falls State Park, Texas''. Bureau of Economic Geology. 1997. p3.〕 A volcano, now long extinct and called "Pilot Knob," spewed debris into the surrounding sea. The streams of soft volcanic debris eroded faster than the hard limestone. The removal of the softer layers and undercutting of the limestone by the water led the falls to be formed over millions of years. There is evidence that hunter-gatherers occupied the land that is now McKinney Falls State Park at least five thousand years ago, maybe more. The tribes found water in the creek and protection among the rock shelters created by the same undercutting action that created the falls. 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「McKinney Falls State Park」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.