glacial striations
Glacier-carved rock lines
Glacial striations are parallel scratches or grooves carved into bedrock by glaciers.
As a glacier moves, rocks and debris frozen into its base scrape against the underlying surface, leaving distinctive linear marks.
Geologists read these striations to determine the direction of ancient ice flow: The glacial striations on this outcrop run northeast to southwest.
- roche moutonnéeGlacier-polished bedrock knob
- abrasionShallow surface wound
- ice sheetThick glacial landmass covering
- tillRegister drawer for money
- drumlinStreamlined glacial hill
erosion · ice age · plucking · ice flow · moraine · gouges · scoring · esker · hanging valley · cirque · parallel · arête · direction · ice cap · ancient ice · carved · paleoclimate · debris
glacial striationswater erosion
Land worn by flowing liquid
chemical weathering · wind erosion · river channels · potholes · sea cliffs
glacial striationsmoraines
Glacial sediment accumulations
glacial deposits · drumlins · eskers · loess