Assertion: glacier | /r/CapableOf | form at the edge of a mountain
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: The four types of alpine glaciers include cirque, forming on the slope of a mountain; valley, filling a valley between two mountains; Piedmont, when two or more glaciers form usually at the edge of a mountain; and Tidewater, a glacier that meets the sea, and when a piece breaks off, the floating mass of ice is known as an iceberg.