In other (Geological) words

• cuesta, noun. A long, low ridge with a relatively steep face or escarpment on one side and a long, gentle slope on the other.
• escarpment, noun. A long, precipitous, clifflike ridge of land, rock, or the like, commonly formed by faulting or fracturing of the earth’s crust.
• gorge, noun. A narrow cleft with steep, rocky walls, especially one through which a stream runs; a small canyon.
• mesa, noun. A land formation, less extensive than a plateau, having steep walls and a relatively flat top and common in arid and semiarid parts of the southwestern U.S. and Mexico.
• salient, noun. Something (such as a promontory) that projects outward or upward from its surroundings.
• scarp, noun. A line of cliffs formed by the faulting or fracturing of the earth’s crust.
• wold, noun. (chiefly British) A piece of high, open, uncultivated land or moor; an area of high open land.