Dead Ice

Dead Ice

 

remnants of a glacier that has stopped moving. Dead ice is found below the end of an active glacier tongue, and often there is no clear boundary between it and the tongue. Dead ice may be several dozen meters thick. In mountains dead ice is usually covered by a thick layer of morainic deposits, which makes it difficult for the dead ice to thaw and causes it to be preserved for long periods. The uneven thawing of dead ice leads to the formation of complex hilly relief and thermokarstic depressions. Particularly large sections of dead ice form as a result of the rapid movement of large ice masses downward, where, because of an overload of moraine, they stop moving and lose their connection with the active part of the glacier. It is hypothesized that enormous masses of dead ice were formed as a result of the degradation of Pleistocene ice sheets.

References in periodicals archive ?
In dead ice conditions the melting out of sediments could happen hundreds or even thousands of years later than in the ice-marginal zone.
It is well known that eskers have formed in different ways--in dead ice as well as in active and passive glaciers.
As kames have been formed in dead ice and had limited possibilities of bleaching, we investigated and dated only one, Pikasaare kame field close to the Pandivere zone (Fig.
Nie alleen Marta se afwesigheid nie, maar veral ook die lang besoek van Hendrik se susterskind Marina (of Dead Ice, die naam wat sy verkies) aan die plaas, verander in die tussentyd Hendrik se vooropgestelde idees oor vroue en verhoudinge.
Dit is wel ietwat ironies dat 'n roman wat die gevare van tipering vooropstel self so sterk tipeer, veral in die geval van Dead Ice.
On the other hand, pioneer vegetation undoubtedly already existed in the dead ice topography, but in clay and silt the older pollen grains are mixed with younger ones.
The history of deglaciation is genetically connected with the ice-dammed lakes, which developed in front of the ice margin or in the body of melting dead ice.
Based on our preliminary analysis, we dare to say that during the setting of loamy silt, the first vegetation at the ice-free sites or till cover on dead ice may have appeared already in the Older Dryas.