 From its western end, the escarpment continues southwards beyond the deep valley of the Glen Burn (Glen Vale) to Bishop Hill (locally, simply The Bishop) ().The steep-sided peaks of East and West Lomond themselves are volcanic in origin.Along the edges of the sandstone bed at the foot of the scarp slopes are several strangely eroded outcrops, the most famous of which are the Bunnet Stane and John Knox's Pulpit, so named because it is believed to be a spot where covenanters held conventicles in the 17th century.