7 0 DESCRIPTION OF THE 
ROCKS 
Feet. 
* Above the mill- 
f Freestone and coarse hazle . 
52 
stone grit, ... 89 
( Plates and grits 
37 
* Millstone grit ... 27 
( Plate and grits ... . 
45 
* Above the grind- 
^Freestone 
45 
stone sill ... 248 
y Alternating grits and plates . 
70 
r 
(.Alternating thin gray beds . 
. 
88 
Grindstone sill ... 24 
j F eet. In, 
Plates and grits 
52 
0 
Fell top limestone... 
4 
6 
Above the fire- 
Coal 
0 
8 
stone ... 276 
Plates and grits 
82 
0 
Slate or flagstone sills 
52 
6 
Plate and a slaty bed 
60 
0 
- ‘ Ironstone’ and Coal 
4 
6 
‘Firestone, ’a coarse 2 
grit rock S ^ 
Plates and grits 
67 
0 
‘ Pattinson’s sill ... 
12 
0 
Plate 
18 
0 
‘ Little limestone’ ... 
9 
0 
Above the main 
Plate 
18 
0 
limestone ... 174 ' 
Coal 
1 
6 
‘ High coal sill’ 
12 
0 
Plate 
7 
6 
Coal 
1 
0 
‘Low coal sill’ 
10 
0 
Plate 
18 
0 
Main or twelve fathom limestone. 
871 
The ‘ firestone’ of Aldstone moor and Teesdale is equivalent to the 
‘white grit’ of Arkendale, and the pebbly grit of Ingleborough, the 
space below it being somewhat augmented by coal measures, of 
which no trace occurs in Swaledale, though perhaps the lowest coals 
* These parts of the section were taken by Mr. Forster from Healy field in Derweht ; those below 
from Aldstone moor. 
