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Longitudinal crevasses (crevasses)
Longitudinal crevasses occur in glacial ice in the following two cases, among others:
1) The glacier flows from a narrower to a wider part of the terrain. In the transition to the wider area, forces arise in the ice which lead to the formation of longitudinal crevasses.
2) Under the glacier there is an elongated obstacle (in the direction of flow) that is not too high and has so far been able to withstand the forces of the glacier. The glacier ice must flow around this ice, which leads to stresses in the ice that can lead to the formation of longitudinal crevasses.
Longitudinal crevasses (1) and transverse crevasses (2) on Gornergletscher. Photo taken on 13.9.2019.
The cause of these longitudinal crevasses is probably a rocky ridge that runs pretty much from west to east.
Detail from the photo above.
Longitudinal crevasses (1) and
Transverse crevasses (2) on the Grenzgletscher. Photo taken on 13.9.2019.
In this case, there is probably a rock hump under the ice, which has been able to withstand the ice so far.
Longitudinal crevasses (1) and transverse crevasses (2) on the Grenzgletscher. Photo from 2.9.2016.
In this example, too, there is probably a rock hump under the ice.
Published:
11.05.2022
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