What Are Scratches Left In Rock By A Glacier Called?
What Are Scratches Left In Rock By A Glacier Called? As ancient glaciers flowed over basalt at Devil’s Postpile National Monument (California), rock and sediment in the ice left scratches on the bedrock. These scratches, “striations,” can be used to understand past ice flow. What are glacial scars? Glacial striations are a series of long,