An arête is a steep-sided ridge formed when two glaciers flow in parallel valleys. The glaciers erode the sdes of the valleys, which sharpens the ridge between them. e.g The Lake District
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Pyramidal Peak
A pyramidal peak is a pointed mountain peak with at least three sides. It is formed when three or more back-to-back glaciers erode a mountain. It is where three or more arêtes meet.
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