(1) A deep, narrow valley or gorge in the earth's surface worn by running water (2) A small narrow steep-sided valley that is larger than a gully and smaller than a canyon and that is usually worn by running water
A ravine is a very deep narrow valley with steep sides. The bus is said to have overturned and fallen into a ravine. = gorge. a deep narrow valley with steep sides = gorge (from rapina; RAPINE)
a deep narrow cleft in the earth's surface usually caused by runoff Relief: changes in terrain Relief shading: a process of shading the map so that it takes on a three-dimensional look Typically, maps are shaded as if the light source casting the shadow is coming from the northwest Rock flour: a fine, silty sediment from glacially ground rock that causes creaks and mountain tarns to appear milky or greenish in color Runoff: rainfall that is not absorbed by the soil