Leonard Horner,
On the Geology of the South-Western part of Somersetshire
(1816)
“ A road is carried along the side of the Quantock hills from Crowcombe to Bagborough by Triscombe. The derivative rocks prevail all along this road, although it is at a very considerable elevation: this is the greatest height at which I found them, except in one place on the eastern slope of the Quantock hills, and near the summit of the range, at Quantock farm; where in digging a foundation there was found below the surface soil a conglomerate, consisting of rounded fragments of grauwacke cemented by a deep red clay, forming a mass of extreme hardness. ”
