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Glacial striae

Glacier scratches occur when glacial ice glides over underlying, polished rock (glacial polish) and loose stones get between ice and glacial cut. The stones leave traces on the glacier polish which can be used to reconstruct the direction of flow of the glacier.
Glacial striae (Gamchi glacier 2019).
Glacial striae (Gamchi glacier 2019).
Direction of ice flow: from bottom to top.
Glacial striae on roche moutonnee (Gamchi glacier 2019).
Glacial striae on glacial polish (Gorner glacier 2019)
Direction of ice flow: from left to right.
Glacial striae on glacial polish (Gorner glacier 2019)
Glacial striae on glacial polish (Gorner glacier 2019)
The ice flowed around this rocky promontory in several directions. Main direction: From bottom left to top right.
The striking lines running from bottom right to top left are cracks in the rock, not glacial striae.
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Photos
Published / Updated: 30.06.2019 / 26.10.2019

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