190 
HUGHES : INGLEBOROUGH. 
The boundary is not quite clear along High Howeth until 
we come to the numerous springs and kelds seen for a mile or so 
from High Howeth to Cold Cotes, among which occur that 
described by Playfair {vide sup., p. 178, and the sections Figs. 1 
and 2). In one we have 18 inches of the conglomerate, made up 
of fragments of schist, resting on an irregular surface of the 
Green Slate Series. In the next, which is in the corresponding 
position on the S.W. side of the valley to the Twisleton Dale 
House dome described above, there is a fine keld in which one 
foot of the conglomerate made up of schist is seen, with fossils 
fairly abundant, and, about 300 yards further S.W., a spring 
at which about 10 feet of limestone is seen, with coarse breccia 
on four feet of flaggy, shaly limestone, with plenty of fossils, 
and resting on the Green Slate Series. About a quarter of a mile 
further S.W. is another keld. in which the limestone is seen 
resting upon an irregularly-denuded surface of the Green Slates. 
Near the 19th milestone from Lancaster we find grey limestone 
with quartz pebbles and fossils, and near Skirwith there are beds 
at the base of the Mountain Limestone full of pebbles of Silurian 
Grit and quartz. 
It is important, when following up the local variations in 
such a deposit as this Basement Bed, not to miss any section 
which may help to suggest any direction or manner in which 
the changes are taking place, with a view to suggesting ex- 
planations. We now find that our boundary must be carried 
along a faulted and drift-covered country, but fortunately there 
are two small exposures near the source of Jenkin Beck which 
show us that we have got off the Green Slate Series, and that 
the Basement Bed now rests on the Bala calcareous shales and 
limestone. A dark grey limestone with quartz pebbles, with 
a small N.N.E. dip, is seen by the spring north of the great bend 
in Jenkin Beck, while the base of the Mountain Limestone, with 
a dip of 10° S.E. is expn^sed near the source of the stream, resting 
on Coniston Limestone and Shale, which dips 70°, S. 30° W. 
Although here in a crushed corner close to the great 
Craven Faults the dips are conflicting, the normal succession of the 
pre-Carboniferous rocks is seen to hold, and about three miles 
to the S.W. we find the same Bala Limestone and Shale exposed 
