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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 Poway Formation ： ウィキペディア英語版 Poway Formation The Poway Formation is a geologic formation in San Diego County, Southern California. It preserves fossils dating back to the Paleogene period.〔(【引用サイトリンク】author= Various Contributors to the Paleobiology Database )〕 ==Poway clasts== Volcanic clastic rock cobbles of rhyolite, in a sandstone matrix in this area are named Poway clasts.〔(San Diego Mesa College: Tecolote Canyon: A Geologic Overview ) — ''with Poway Clasts image''.〕 The ancient Ballena River brought rhyolite-gravel, or “Poway" clasts, from a region in present-day Sonora, Mexico to the Pacific Ocean. Its sediments deposited into alluvial fan-submarine canyon-submarine fan complex extending for miles offshore. Remnants of submarine fan facies outcrops are found as far west as the northern Channel Islands. Inland Ballena River deposits outcrop discontinuously over in a west-southwest trend from Whale Mountain to San Vicente Reservoir, here the river was up to in width through Peninsular Ranges.〔(Geiconsultants.com: "Geologic Formations of Western San Diego County" ), by Jeffrey D. Brown, R.G., C.E.G., GEI Consultants, Inc. − c.1996.〕 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「Poway 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.