326 
HUGHES : INGLEBOROUGH. 
valley allow us to trace the bedding, it is sometimes seen that 
they are folded over in sharp plications of such a kind as it 
would be impossible to detect in the fine homogeneous slates. 
It may be, therefore, that the thickness of the series is not so 
great as would be inferred from this apparently regular succession 
at a high angle for 2 J miles along the valley, but that with a 
general succession to the S.W. each portion is repeated in a series 
of sharp folds as shown in the diagram (Fig. 10). The pressure 
that produced these folds must have been in the same direction 
as that which produced the cleavage, but whether there is evidence 
of a cross strain in what looks like double cleavage or cleavage in 
two directions in the Ingleton quarries, or whether that is due 
to local readjustments to meet some accidental greater resistance 
we cannot now make out. 
Fig. 10. 
In the Ingleton " granite " quarry the coarse grit is excavated 
for road metal, the word " granite " being frequently used in 
commerce for any rock with a coarse grain. The more unyielding 
grit is here seen crushed into the associated soft slaty material, 
and, as there was much stretching of the mass, especially at the 
contact surfaces, when the mud was being squeezed out into a 
cleaved slate and the tough grit had to accommodate itself to the 
changed relations, there was a good deal of tearing and inclusion 
of fragments in the adjacent rocks, and it is not always easy to 
decide whether a given specimen is a part of the brecciated 
conglomerate or owes its character largely to brecciation in place 
and drag along the planes of readjustment. 
