The summit itself is known as Carnedd Bachgen, named after the ancient cairn, Carnedd y Bachgen (which lies just north-east of the summit), and is the highest point at the north end of a wide plateau. There is a trig point and a substantial shelter cairn. The mountain rises from the Migneint moorland and looks like a bulky heathery "lump" from most directions. However, its north-eastern face has steep cliffs with a small corrie lake, Llyn Arenig Fach, at their bottom.[1] The last glacier occupation of this corrie is thought to have happened during the Loch Lomond Stadial.[2]
References
^Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. ISBN1-85284-304-7.
^Loch Lomond Stadial glaciers in the Aran and Arenig Mountains, North Wales, Great Britain. Philip D. Hughes. Geological Journal, Volume 37 Issue 1, Pages 9 - 15. 2001.