HUGHES : ENGLEBOROUGH. 
57 
The Moughton Whetsto^^e. 
In the north-east corner of Crummack Dale, where denuda- 
tion has cut back the Mountain Limestone so as to leave the 
Silurian and Bala beds exposed in a bay, out of which Moughton 
Sike runs, and into which Moughton Lane leads to the path 
taking us over the Scars to Horton-in-Ribblesdale, there 
is a curiously weathered rock, which, from its soft, sandy homo- 
geneous texture, has long been held in repute as a whetstone. 
Two systems of joints slightly oblique to one another cause it 
Fig. 4. 
DIAORAM SHOWING A POSSIBLE EXPLANATION OF THE MODE OF OCCURRENCE 
OF THE BEDS AT THE MOUGHTON WHETSTONE HOLE, ON THE HYPO- 
THESIS THAT THE MOUGHTON WHETSTONE MUST BE REFERRED TO 
A HIGHER HORIZON THAN THAT OF THE AUSTWICK FLAGS AND GRITS. 
a. Horton Flags. 
h. Aiistwick Grits and Flags. 
c. Pale Slate, Graptolitic Mudstone, and Basement Bed. 
d. Bala Beds. 
to break up into parallelograms from a few inches to a foot or 
so in length, with a varying breadth and a thickness of about 
half an inch. The colour of the rock is a greenish grey, but 
infiltration from the joint surfaces has given rise to thin bands 
of a claret-red colour, at first following the outline of the frag- 
ment, but soon, by rounding off the corners, forming a concentric 
circular or oval pattern.* The manner in which this banded 
arrangement of the iron oxides is produced has been discussed 
* See Maw on the disposition of iron in variegated strata, Q.J.G.S., 
vol. xxiv., 18G8, p. 368, PI. XIV., Fig. 30. 
