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词汇 cryoturbation
分类 英语词汇 英语翻译词典
释义

cryoturbation /ˌkraiətə:'beiʃən/

英汉-汉英词典
冻裂搅动;冻融搅动;融冻泥流作用
词组 | 习惯用语
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  • conurbation n. 集合城市(具有许多卫星城的大城市)
  • contribution n. 捐助物, 贡献 捐款
  • masturbation n. 手淫
  • perturbation n. 忧虑;不安;烦恼 摄动;微扰;小变异
cryoturbation n. 冰扰作用;冻搅;融冰扰动作用

网络短语:
cryoturbation structure 冻裂搅动构造
英语百科

Cryoturbation

Cut-away section of soil, showing movement of soil layers due to cryoturbation.

In gelisols (permafrost soils), cryoturbation (frost churning) refers to the mixing of materials from various horizons of the soil down to the bedrock due to freezing and thawing.

Cryoturbation occurs to varying degrees in most gelisols. The cause of cryoturbation lies in the way in which the repeated freezing of the soil during autumn causes the formation of ice wedges at the most easily erodible parts of the parent rock. If the parent rock is hard, this can cause quite deep erosion of the rock over many years. As this process continues, during the summer when an active layer forms in the soil this eroded material can easily move both from the soil surface downward and from the permafrost table upward.

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