What Is a sharp ridge separating cirque?

A sharp ridge separating cirques is known as a "horn" or "arete." It forms as glacial erosion carves out steep valleys on either side, leaving a narrow, rugged ridge between the two cirques. This topographical feature is often characterized by its jagged peaks and steep slopes, making it a prominent feature in alpine landscapes. Horns and aretes are common in mountainous areas where glaciers have significantly shaped the terrain.