56 
HUGHES : INGLEBOROUGH. 
and Norber. A tongue of the same rock is protruded in a small 
anticlinal fold just north of where the H in " Horton Wood " 
is engraved on the six-inch map. Near the " oo " of Wood 
there is an ill-defined grit passing up through sandstone into 
flags, but this I believe to be on a lower horizon, and would 
refer it to a gritty bed in the Austwick Flags. 
Among the numerous examples of interesting rock structures 
to be seen in this district is that illustrated in the subjoined 
diagram (Fig. 3). The section occurs in a tough, slaty sandstone 
Fig. 3. 
SECTIOX SEEN IN THE AUSTWICK GRITS ABOVE THE GORGE IN CRUMMACK 
DALE NEAR SOWERTHWAITE. 
Length of Section, 12 feet. 
in Crummack Beck just above the gorge. The bedding planes 
are inclined at a high angle. Owing perhaps to some original 
difference of composition, the large divisional planes block 
the rock out into obvious massive beds, only the upper portion 
of each of which was susceptible of cleavage. However tha.t 
may have been, it is cler^r that subsequent movements have 
caused displacements along these bedding planes and bent over 
the cleavage in accordance with the drag between the beds. 
I have seen the same thing in the Silurian rocks near Llan- 
ddewi Brefi, in Cardiganshire ; this was figured in the 2nd edition 
of Lyell's " Students' Elements," 1874, p. 590. Fig. 634. 
