358 DAKYNS : LOWER CARBONIFEROUS ROCKS IN YORKSHIRE. 
the fault. In the River Dibb the position of the fault is fixed 
approximately just above Dowscar Nook by the fact of there being 
grit in place with limestone on either side. A mile further east the 
position is fixed exactly by the abrupt termination of the grit of 
Fancarl Crag against limestone on the north ; and similarly a mile 
and a half further east by the end of the millstone gxit escarpment at 
High Crag. 
On the north side of the Craven Fault we have, east of the 
River Dibb, massive white limestone, dipping north at 19° under a 
tliin band of shale, above which comes the millstone grit of Grimwith 
Fell. Greenhow Hill is the dome-shaped end of this band of lime- 
stone, and is an anticlinal broken by the Craven Fault. 
Between the River Dibb and Grassington the ground is very 
obscure ; but the millstone grit seems to be separated from the 
limestone by a great thickness of shales with but poor limestone 
bands. At Grassington, however, the limestones swell out, so that 
with the exception of the Dirt Pot grits there is solid limestone from 
the millstone grit of Grassington Moor down to the River Wharfe. 
Northwards this thick limestone splits up, and finally takes on 
the Yoredale type. At Kettlewell upwards of 775 feet of carbon- 
iferous limestone are seen. This mass consists of solid limestone, 
forming scars, but without any interbeds of plate or sandstone. The 
overlying Dirt Pot gTit can be distinctly traced from Grassington to 
Kettlewell by reason of its throwing out the water percolating the 
limestone above it. 
At New Rake vein the section is as below : — 
Bearing Grit. 
Limestone encrinital. 
Thin Sandstone or Shale Band. 
Limestone. 
Dirt Pot Grit. 
Carboniferous Limestone. 
Northwards the uppermost limestone runs away from the mill- 
stone grit, the intermediate space being occupied by plate with 
a thin limestone. 
The limestone above the Dirt Pot grit, which is here the lowest 
