Glacial Striation

Glacial striation refers to long, parallel scratches and grooves found on bedrock, caused by a glacier's movement. As glaciers advance, embedded rocks and debris are dragged across the Earth's surface, grinding and scratching the underlying rock. These markings reveal the glacier's direction and movement history, serving as evidence of past glacial activity. Striations can vary in size and depth, depending on the glacier's force and the hardness of the bedrock. They are important clues used by geologists to understand the extent and direction of ancient ice sheets during periods of glaciation.