Geograph - photograph every grid square

See NS4377 : Black Craig for a later picture of the same feature.

The small and gentle Overtoun Burn runs from right to left, hidden from view in a surprisingly deep and steep-sided valley; two light-grey patches of bare rock can be seen here, too steep for vegetation to have established itself on them. These grey areas are examples of Ballagan Beds; compare NS4377 : Ballagan Beds in Overtoun Glen, taken nearby.

Higher up on the far side of the valley, Black Craig is visible: a long dark horizontal outcrop of rock. It is perhaps composed of Spout of Ballagan sandstone, which overlies the Ballagan Beds elsewhere in the vicinity, and which was used for building NS4276 : Overtoun House. For more on the Spout of Ballagan sandstone, see NS4276 : Spardie Linn and NS4377 : Disused quarry; the old quarry is near Black Craig, and NS4276 : Spardie Linn is a little over a kilometre further away in the same direction.