...the lower part of the slope is dominated by a cold pediment, a gently sloping denuded slope. The valley often has a shallow depression at the head of the valley, or an asymmetrical valley, with different banks due to the difference in the amount of solar radiation on both sides. Snow does not accumulate on the windward slope near the ridgeline, and the strong freeze-thaw action creates a smooth slope, while the snow drifts and accumulates on the leeward side, creating a steep slope due to snow erosion. Overall, an asymmetrical ridge develops, with both slopes at different inclines. *Some of the terminology explanations that mention "asymmetrical valley" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…斜面下部には緩傾斜の削剝斜面である寒冷ペディメントが広がる。谷は谷頭部が浅くくぼんだ周氷河皿状地や,両谷壁の日射量の違いによって両岸の傾斜が異なる非対称谷asymmetrical valleyになることが多い。稜線付近の風上側斜面には雪が積もらず,凍結融解作用が強く働いてなめらかな斜面が形成され,風下側には雪が吹きたまって雪食作用による急斜面ができ,全体として両斜面の傾斜の異なる非対称山稜asymmetrical ridgeが発達する。… ※「asymmetrical valley」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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