338 
HUGHES : INGLEBOROUGH. 
About three-quarters of a mile north of the section near Wharf e 
which has just been described, where the principal feeder of Crummack 
Beck issues from the base of the Carboniferous rocks (see Plate L.), 
the stream has cut down on to the top of another anticlinal fold which 
brought Bala Beds within reach of recent denudation (Fig. 14). 
This interesting spot is known as Austwick Beck Head, from the 
name of the stream into which the water eventually finds its way, 
though the tributary which immediately receives it is known as 
Crummack Beck. Just below the junction of the stream from 
Austwick Beck Head and Moughton Sike the Coniston or Bala 
Fig. 14. 
DIAGRAM ILLUSTRATING THE MODE OF OCCURRENCE OF THE STRATA 
AT AUSTWICK BECK HEAD. 
a. Mountain Limestone. 
h. Basement bed of the Mountain Limestone. 
c. Silurian. 
d. Basement bed of Silurian, 
f . Bala Shale and Limestone. 
Limestone is seen dipping south. It is at the surface in Moughton 
Lane with a similar strike and under the Mountain Limestone scar on 
the east is again seen dipping south at about 50°. 
Close to the keld or springhead the basement bed of the Silurian 
is exposed resting on the Bala Shale. This section is not very clear 
owing to the creep-forward of the basement bed of the Carboniferous 
for some distance down the side of the stream ; in fact, we have here 
an example of the occurrence of a depression along the outcrop of the 
Bala Beds which I referred to above (p. 331). It is increased some- 
what in this case by a crush and some faulted ground along the 
