Orienteers
use the English word "gully" (or reentrant) to describe a landform that
slopes up a hill with rising land on both sides. Gullies are usually caused
by water flowing down a slope - cutting a small impression at the top but getting
deeper and wider as it moves further down the hill.
A gully appears on the map as a U or V shape in the contour lines, pointing back into a hillside rather than sticking out of the hill (as would a spur). So a gully is a small valley, the center of which would collect water and funnel it downhill (if it were raining hard). This portion of a map includes several gullies, three of which are circled. The west-most is a small, v-shaped gully, while the two eastern examples are broad and somewhat shallow.