Kedjorspår

Kedjorspår, often translated as "chain marks" or "chain tracks," refers to a geological feature consisting of parallel, shallow grooves or channels etched into rock surfaces. These marks are typically found in areas that were once covered by glaciers. The formation of kedjorspår is attributed to the erosive power of glacial ice, specifically the debris embedded within the ice.

As glaciers move, rocks and sediment trapped in their base and sides scrape against the underlying bedrock. These embedded fragments act like abrasive tools, grinding and plowing the rock surface. When the ice melts or recedes, these linear scars become visible. The spacing and depth of the kedjorspår can vary depending on the size and type of debris within the ice, as well as the resistance of the bedrock.

Kedjorspår are a significant indicator of past glaciation and are studied by geologists to reconstruct the movement and extent of ancient ice sheets. They are commonly found in mountainous regions and high-latitude areas that have experienced glacial activity. The preservation of these features depends on subsequent erosion and weathering processes. Their presence helps to differentiate glacial landscapes from those shaped by other erosional forces.