Sugar Loaf, Monmouthshire Sugar Loaf, Monmouthshire Sugar Loaf, sometimes called The Sugar Loaf ( or ), is a mountain situated north-west of Abergavenny in Monmouthshire, Wales. It is the southernmost of the summit peaks of the Black Mountains, with a height of 1,955 feet (596 metres). The original Welsh name of the hill appears to have been Mynydd Pen-y-fâl. Translated into English, this name means 'mountain of the head/top of the peak/summit' from "mynydd", "pen" and "bâl". The name Sugar Loaf has been popularly applied to numerous hills which have a perceived resemblance to a sugarloaf; the nearest other such hill is the
Sugar Loaf, Monmouthshire the early part of the Devonian Period. Its lower slopes (up to around are composed of mudstones and sandstones assigned to the Senni Formation whilst its upper reaches are composed of the more sandstone-rich sequence known as the Brownstones Formation. The very summit of Sugar Loaf is formed from sandstones of the Quartz Conglomerate Group which are of late Devonian age. There are a number of landslips on its flanks which are believed to date from early post-glacial times. The former Usk Valley glacier divided to north and south of it as it travelled eastwards, though the mountain itself is