Abstract
This is a study of glacial crescentic markings, attempting to establish a correlation between the orientation of these features and the direction of ice movement. The principal crescentic marks are reviewed. It is observed that the fracture of these features dips forward in the direction of the ice movement and hence may be a usable criterion in determining the direction of ice movement. The term "friction crack" is suggested for glacial crescentic markings which possess this feature.
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