| Term: | Chattermarks |
| Definition: | Striations or marks left on the surface of exposed bedrock caused by the advance and retreat of glacier ice. |
| Term: | Chattermarks |
| Definition: | A series of small, closely spaced, crescentic grooves or scars formed in bedrock by rocks frozen in basal ice as they move along and chip the glacier's bed. The horns of the crescent generally point down glacier. |
| Term: | Chattermarks |
| Definition: | A group of crescent-shaped friction cracks on bedrock, formed by the juddering effect of moving ice. |