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22:13 Nov 15, 2012 |
English to Swedish translations [PRO] Science - Geology | |||||||
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| Selected response from: Sven Petersson Sweden Local time: 22:58 | ||||||
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Summary of answers provided | ||||
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5 | frostsprängning |
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3 +1 | isbävning |
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frostsprängning Explanation: Från WP: Frostsprängning är en mekanisk vittring där berget sönderdelas i mindre bitar. Bland de mekaniska vittringsmekanismerna är frostsprängning den väsentligaste inom jordens kalla regioner och inom fjällområden. Vid frostsprängning tränger vatten in i genom sprickor och porer i berggrunden, den ökar vid frysning till is sin volym. Detta medför att sprickor vidgas och mineralkorn frigörs från berget. A cryoseism, also known as a frost quake[1][2], may be caused by a sudden cracking action in frozen soil or rock saturated with water or ice.[3] As water seeps down into the rock, it freezes and expands, putting stress on surrounding rock. This builds up until it is relieved explosively in a cryoseism.[4] Another form of cryoseism known as an ice quake, is a non-tectonic seismic event caused by sudden glacial movements, sometimes due to the formation of a thin veneer of liquid water under a glacier from surface melting. Usually, a glacier would stick to the rough bedrock, but the hydraulic pressure acts as a lubricant, allowing it to slide up to many metres at once.[5][6] This type of cryoseism can last for tens of minutes.[7] Reference: http://sv.wikipedia.org/wiki/Frostspr%C3%A4ngning Reference: http://en.wikipedia.org/wiki/Ice_quake |
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isbävning Explanation: :o) Reference: http://hem.passagen.se/walker/grauni.htm |
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