ERTH 2415 Lecture Notes - Lecture 16: Kii Peninsula, Anticline, Rede Ferroviária Nacional
27 Mar 2018
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Document Summary
Rotational slides: slide in which failure occurs on a very steep slope, along a concave rupture surface, multiple blocks often fail, due to natural factors (e. g, wave orison) or human activity (e. g, road cuts) Gelifluction: type of flow observed in northern regions, linked to the melting of the top layer of permafrost, water cannot infiltrate through the permanently frozen, impermeable layer below, soil becomes saturated and weak, and flows down gentle slopes. Complex events: combination of falls, slides and/or flows, most mass movements are complex events, avalanche: rapid complex event. Subsidence: slow subsidence: gradual sinking of the land surface, rapid subsidence: surface collapse of underground cavities, man-made: abandoned tunnels, natural: sinkholes, collapse into void, vertical downward movement, move as separate blocks. Sinkholes: circular area of subsidence caused by collapse into subterranean void, occur typically in sedimentary rocks that can dissolve in water, ex limestone, diameter =.
