Vol. 58.] AMONG THE JURASSIC ROCKS OF SUTHERLAND. 295 
It will be seen that the lowest breccia-bed, though the thickest 
here seen, has considerable masses of uniform shale or clay, both 
above and below. As we pass up the gorge this band of breccia 
thickens somewhat, until it meets with a discontinuity, or small 
fault, on the other side of which is a breccia-band of much greater 
thickness—traceable as far as a small reservoir, where it occupies 
the whole overhanging slope (fig. 3, p. 294), and is seen to include 
Fig. 4.— Waterfall on Gartymore Burn, showing the sides of the 
gorge composed entirely of broken-up Caithiress Flags. 
[From a photograph. | 
some large rounded stones ; some portion also shows signs of strati- 
fication like a bed of solid grit, which is lost among the fragments. 
At the upper end of the reservoir two streams unite: that to the 
south has its sides entirely composed of great angular masses of, 
presumably, Caithness Flags; and that to the north is of the same 
character, though less clearly seen at a distance (fig. 4). The rocks 
exposed on this side are practically continuous with those last seen, 
for the wall in fig. 3 ends with the post seen in fig.4. The breccia, 
