Aretes
An arete is a sharp, narrow ridge formed where two cirques or glaciers erode the adjacent mountainsides. The ridge is created by the opposing erosion of glaciers on either side of the ridge, leaving a thin line of rock between them.
Real World
Striding Edge on Helvellyn is one of England's most famous arêtes, a knife-edge ridge formed between the cirques of Red Tarn and Nethermost Cove during Pleistocene glaciation.
Exam Focus
Sketch annotated diagrams showing two adjacent cirques eroding towards each other — diagrams earn extra communication marks.
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