HUGHES : INGLEBOROUGH. 
291 
The Yoredale Rocks. 
None of the sub-divisions of the Yoredale rocks can be 
continuously traced round Ingleborougb , but the presence of 
limestone is generally indicated by swaUow holes above and 
springs below. The sandstones also, when much jointed and 
broken, commonly give rise to springs, where the water which 
has got into the fissured rock is thrown out near the base. The 
limestones and sandstones generallj^ stand out as terraces and 
scars, whereas the shales crumble down into steep slopes. The 
vegetation is, of course, affected by these different conditions, 
and it is only by observing a great number of small indications 
that the beds can be traced. The contour lines must not be 
taken without allowance being made for the amount of drift 
and talus hanging on the hillside. 
To return to the section below Farrer's Shooting Box,* 
a convenient and easily found starting point, in the bank between 
the road and the wall, a little higher up stream than the highest 
bed of marble described on p. 278, there is a mass of dark grey 
shale {a of section. Fig. 4, p. 277). Some of the beds split up 
with a \ery smooth flat surface ; others show much conchoidal 
fracture, which causes small flat pieces with rounded margin 
to drop out under the hammer. There is generally a rusty 
stain along the divisional planes, and, as is usual where these 
ferruginous films occur, fossils are scarce and hard to find. 
There are numerous small black concretions with rusty exterior 
and calcareous septa, reminding us of " beetle stones." Some 
nodules are pierced by tubes which, when broken, look as if 
they represented borings, but on the outside rather suggest 
the weathered ends of a very small Lithostrotion. I expected 
Chonetes hardrensis in this shale, but I failed to detect it. 
Perhaps it may yet be found nearer the base where it is passing 
into the Black Marble, for 1 take this to be the Hardrow Shale. 
This fossil occurs abundantly further north, in Linn Gill for 
instance. 
* Those who wish to wander on the usual routes to tne caves or the 
mountain, in order to carry on their scientific researches, should leave 
their name and obtain permission from the courteous owner oi the pro- 
perty, who deserves the grateful co-operation of our Scientific Societies 
in his endeavour to protect the indigenous fauna and fiora from indis- 
criminate destruction. 
