299 
There are two principal beds of Sandstone which ex- 
hibit a great tendency to assume a red or purple colour 
when, in juxtaposition with the Permian Limestone. One 
of them occupies a large area in the northern part of the 
West Ridinof, stretching from the Moorlands north of Brim- 
ham Rocks in an easterly and south-easterly direction, and 
disappearing beneath the Permian Limestone. The second 
is in the southern extremity of the county, and known as 
the Red Rock of Rotherham. Between these localities the 
Limestone rests on sandstones and shales, which exhibit a 
much larger proportion of sections, in whicli the colour is 
the ordinary grey or white of the rocks where seen away 
from the Limestone, but which are occasionally coloured red 
or purple. 
The Red Grit in the Brimham and Plumpton district 
is far from being uniformly red, in many cases it is a grey 
or whitish colour. Examples in which the red colour is 
conspicuous may be seen at South Stainley, Scarab, Scriven, 
Knaresborough, Plumpton Park, Spofforth, and on the banks 
of the Wharfe (opposite "Wood Hall), and in other places. 
At Scriven, to the north-west of the village, is a quaiTy 
of very thick- bedded purplish grits, about 80 feet thick ; 
near the surface of the quarry is 4 or 5 feet of shaley 
marl of a deep purple colour. The limestone is not seen 
resting directly on tliis sandstone, but about half-a-mile 
north-east a small quarry exposes the limestone with 10 or 
12 feet of quicksand below it. The latter has probably 
been derived from the disintegration of the grit rocks 
beneath, anterior to the limestone being deposited above it. 
The lower beds of the limestone contain sand and pebbles 
of quartz. The dip of the sandstone is to the north-north- 
west/whilst that of the overlying limestone, so fiir as could 
be ascertained, was slightly north-east. At Knaresborough 
the river Nidd has carved its channel through the Permian 
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