lines etched in bedrock underlying glaciers as individual particles embedded in the glacier scratch the underlying bedrock. These lines indicate the orientation of glacial flow.
Scratches produced on an artifact from being used.
Parallel scratches in bedrock caused by rocks embedded in the base of a flowing glacier.
Multiple, generally parallel, linear grooves, carved by rocks frozen in the bed of a glacier into the bedrock over which it flows. Recently-emerged striations, located in bedrock adjacent to the terminus of Guyot Glacier in Icy Bay, Wrangell-St.Elias, Alaska. Note the penny for scale.
Grooves or ridge marks seen under the skin, the ultimate degree of muscle definition.
small lines or grooves
Multiple scratches or minute lines, generally parallel but occasionally cross-cutting, inscribed on a rock surface by a geologic agent. Common indicators of (at least the latest) direction of glacier flow.
Narrow, parallel grooves or lines.
The tiny grooves of muscle across major muscle groups in a highly defined bodybuilder.
Scratches or grooves on a rock or sediment surface caused by abrasive action of objects being transported above it by ice, water or wind.
Linear scratches in rock.
Small-scale grooves cut into rock by the rasping action of rock-laden glaciers.
The long, parallel scratches and grooves produced in rocks underneath a glacier as it moves over them.
are the scratches etched into the rock at the bed of a glacier. Their presence indicates grinding of sand and rock particles into the bed under considerable pressure. In some places find-grained debris polishes the bedrock to a lustrous surface finish called glacial polish. Suncups are a small (up to 1 meter across) depression on a snow or firn surface formed by melting and evaporation, resulting from direct exposure to the sun.
Marks on antique glass, like scratches, making the glass more brilliant and crystalline in effect
Grooves or channels in cloud formations, arranged parallel to the flow of air and therefore depicting the airflow relative to the parent cloud. Striations often reveal the presence of rotation, as in the barber pole or "corkscrew" effect often observed with the rotating updraft of an LP storm.
Striations are grooves, lines and scratches found naturally in some minerals.
Scratches or grooves gouged into surface rock by glacial action. Striations along bedrock indicate direction of ice movement. Often seen on exposed bedrock. Photo.