HUGHES : INGLEBOROUGH. 
69 
Taking a traverse from the footpath about half-way between 
Beekdale Barn and Stanaber Barn w^e infer from the adjoining 
area the occurrence of the Austwick Flags and Grits with a 
northerly dip which brings on the Horton Flags in due succession 
about 100 yards south of White Syke. The beds become nearly 
horizontal under Higher Studfold, but plunge down again to 
the north under Studfold Low Pasture and, as might be expected 
from such a long continuance of northerly dips, we now arrive 
at the top of the series, and the overlying Studfold Sandstone 
comes on in a synclinal fold. Soon after we pass Long Lane 
a pretty sharp anticlinal brings the flags up again, but not for 
more than 200 yards, when the Studfold Sandstone is once 
more caught in a small synclinal. East of the line of section (p. 65) 
the rise of the ground gives such a thickness of this sandstone 
that the Horton Flags are not brought to the surface in the 
anticlinal fold mentioned above, but the Mountain Limestone 
rests on the Studfold Sandstone for about half a mile. From 
this point onwards the section is much obscured by drift, and 
the moraine mounds cover almost all the ground, and more 
and more of the succession has to be inferred from the adjoining 
area. 
If we cross the spur of Mountain Limestone and examine 
the Silurian rocks exposed in Silverdale we shall find the Studfold 
Sandstone coming out just where we should expect it if 
it was prolonged to the east with the normal strike under 
the Carboniferous rocks. Some of the higher beds are, as in 
the corresponding part of the series in other areas, much coarser 
than anything seen along the east flank of Ribblesdale, 
and it is in this coarser part that I think we have the nearest 
representative of the Winder Grits. It would be interesting to find 
here the same group of fossils of Ludlow facies which is so marked 
in the Winder Grit at Sedbergh. I have never been able to 
examine this area properly, but here I think we might find, 
in the finer beds above the grits, the zone of Acidaspis hughesii 
Salter. The nearest point where I have found it is about eight 
miles on the north-west of Ingleborough (Geol. Mag., vol. iii.. 
May, 1866, p. 206), and it would be a very helpful bit of evidence 
for the correlation of these most easterly Silurian beds if we 
