UO DAKYNS: GEOLOGY OF GRASSENGTON AND WENSLEYDALE. 
Ft. 
Plate 
Limestone (3 feet) 
Grit (3 feet)... 
White bed v 36 
Girdles 
Coal ; 
A section drawn across the outcrop of the beds gives the 
following approximate thicknesses : — 
Ft. 
Red Scar Grit... 
60 
Shale 
35 
Sandstone 
15 
Shale ... 
95 
Sandstone 
15 
Shale 
50 
Grit 
65 
Shale 
55 
Main Limestone 
I will now describe the adjoining dah 
js, Walden and Bishopd 
The lowest rock seen is a Sandstone in the bed of the stream below 
Bine Bridge, on the north side of West Burton. This Sandstone is 
also said to have been reached in mining just below the foss of Bow 
Bridge, near Thoralby. A sandstone, which is probably the same as 
the above, occurs in the bed of the Yore, at Red mire Foss, overlaid 
by Limestone. 
At West Burton the section is— 
Hardra Scar Limestone, 2 to 3 fathoms. 
Grit, 2 to 3 yards. 
Plate, 1 fathom. 
Limestone, 10 fathoms. 
Grit, seen in stream below Blue Bridge. 
At the bridge a powerful vein crosses which throws down the 
beds on the south. 
The upper limestone of the above section is that on which 
Swinethwaite stands, and which we identify with the Hardra Scar 
Limestone. Above the Swinethwaite Limestone come measures con- 
