arrêtes

An arête is a sharp mountain ridge that forms as two glaciers or ice fields erode two cirques that are adjacent to each other. This process can also occur on rock, where frost weathering and erosion by two gullies or ravines can create an arête. Arêtes are often knife-edged and can be treacherous to traverse. They are a common feature in glaciated mountain ranges and are often visually striking. The formation of an arête requires a specific set of geological conditions, including significant glaciation or erosion and the presence of two adjacent, opposing erosional forces. The resulting ridge is a testament to the erosive power of natural forces over geological time. The steepness and narrowness of arêtes make them challenging for mountaineers and climbers, often requiring specialized equipment and techniques. Their distinctive shapes contribute to the dramatic landscapes found in many alpine and mountainous regions worldwide.