Sharp ridges are landforms that are formed by the erosion of glaciers. They are characterized by steep, jagged edges and can be found in mountainous regions. The term 'sharp ridges' can refer to three different landforms: aretes (6 letters), seracs (6 letters), and hogbacks (8 letters). Aretes are sharp ridges that form when two glaciers erode away at a mountain from opposite sides. Seracs are large, jagged blocks of ice that form when a glacier fractures. Hogbacks are sharp ridges that form when two adjacent valleys are eroded away by a glacier.