Besides the blocks thus carried down on the top of the glacier, many fall through fissures in the ice to the bottom, where some of them become firmly frozen into the mass, and are pushed along the base of the glacier, abrading, polishing, and grooving the rocky floor below, as a diamond cuts glass, or as emery-powder polishes steel.
"The Student's Elements of Geology"
Sir Charles Lyell
Deliberately, the gun-sight ripped and tore across the forehead-grooving the bone.
"The Gun-Brand"
James B. Hendryx
It runs back around the bend of the Gourzy overlooking the Laruns hollow, the carriage-road grooving its way down far below it.
"A Midsummer Drive Through The Pyrenees"
Edwin Asa Dix