i believe that you are talking about glacial striations
striations
When a Glacier moves over an area of soft or hard rock it may have smaller stones underneath it, these small stones scratch into the larger rock making the Striations. They show which direction the Glacier travelled in.
Crevasses
alignment of grooves in bedrock
Striations
Striae.
i believe that you are talking about glacial striations
striations
A glacier produces grooves and scratches.
When a Glacier moves over an area of soft or hard rock it may have smaller stones underneath it, these small stones scratch into the larger rock making the Striations. They show which direction the Glacier travelled in.
Glacier Grooves and Moraines
Crevasses
Furrows of glacial origin in bedrock that are deeper and wider than striations- Double S
alignment of grooves in bedrock
Where a bullet is pushed through the barrel of a rifled firearm, spiralgrooves cut into the inside of the barrel (rifling) cause the bullet to spin. This provides for better accuracy- and at the same time, makes marks (striations) on the bullet. A shotgun does not have those grooves, and does not produce striations on the projectile.
When a Glacier moves over an area of soft or hard rock it may have smaller stones underneath it, these small stones scratch into the larger rock making the Striations. They show which direction the Glacier travelled in.