The Buck Stone, Staunton, Forest of Dean, Gloucestershire

The Buck Stone is a remnant edge tor comprised of the Quartz Conglomerate - the basal part of the upper Old Red Sandstone (Devonian).

These cross-bedded sediments were deposited in alluvial fan or flash flood deposits, mostly in high-energy rivers draining an arid, mountainous continental area. There are many quartz pebbles, hence the name, but also rock fragments and more exotic pebbles such as jasper, all set in a medium - coarse sand matrix.

Although in located in Gloucestershire, England, the Welsh border is very close by, at the bottom of the slope.