Protalus rampart

A protalus rampart (or pronival rampart) is a

Protalus ramparts are recorded in the Cairngorms and northwest Highlands of Scotland. An especially large example on the north side of Baosbheinn measures 1 km in length and reaches a height of 55 m. It is thought to result from a major rock slope failure, however evidence leads some to class it as a protalus rock glacier.^[2][3][4] Several features amongst the mountains of the Brecon Beacons National Park have been interpreted by some authors as protalus ramparts but as moraines by others. The depositional ridge of Fan Fechan beneath Fan Hir, formerly thought to be a rampart due to its linear nature paralleling the line of the cliff above is now considered to be a moraine.^[5]

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