A rock face is a steep or vertical surface of rock that has been exposed due to weathering or geological processes. Synonyms for this term include cliff, crag, escarpment, precipice, and bluff. A cliff refers to a high, steep face of rock that rises above the surrounding landscape. A crag is a rugged, rocky outcrop that protrudes from a hill or mountain. An escarpment is a long, steep slope or cliff that separates two land masses at different elevations. A precipice is a sheer, vertical face of rock that drops steeply to the ground below. Finally, a bluff is a steep bank or slope that is usually formed by erosion.