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Frog Woman Rock : ウィキペディア英語版 | Frog Woman Rock
Frog Woman Rock is a distinctive volcanic monolith in the Russian River canyon through the California Coast Ranges. The California Historical Landmark, adjacent to US Route 101, is a popular recreation site for rock-climbing and whitewater kayaking. ==Geology== The Russian River channel through the Franciscan Assemblage is moved westerly against the steep, resistant face of Frog Woman Rock by an earthflow known as Squaw Rock Slide. The earth flow forms the east bank of the river where the vertical cliffs of Frog Woman Rock form the west bank. Boulders moved into the river channel by the earth flow remain while turbulent river flow erodes and transports smaller sediment particles of the earth flow down the Russian River.〔Koenig, James B. ''Geologic Map of California:Santa Rosa Sheet'' (1976) State of California Resources Agency〕 The remaining boulders form rapids varying from class III during summer flows of to class V during heavy winter runoff events.〔(【引用サイトリンク】title=Russian River from Hopland to Asti )〕
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「Frog Woman Rock」の詳細全文を読む
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