File:The Quarterly journal of the Geological Society of London (12684551014).jpg

44
PROCEEDINGS OF THE GEOLOGICAL, SOCIETY. .DeC. 3,
A great spur of the Scar Limestone runs down from Whernside to
the scar above Twisleton, forming the separation between Chapel le
Dale and Kingsdale. The Thornton section (fig. 3) begins at the
Fig. 3. — Section from Ingleton to Thornton Force.
Distance about 2 miles. N,
4'. Carboniferous grits.
6. Great Scar-limestone.
7, Old Red .the thickness of this calcareous conglomerate is exaggerated in this Section..
d. Calcareous slate, here and there passing into concretionary limestone, ( = Coniston limestone).
e. Greenish slates, alternating with very hard greenish-grey beds of gritstone, provinc. Calliard,
(=Chloritic Slates of Cumberland and Westmoreland, underlying the Coniston limestone).
N.N.E
Fig. 4. — Section from Twisleton Scar to
Distance about 3 miles.
Slate
quarry.
Trap-dykes.
JOV^Wj»M^-^
s.s.w.
Black Burton
Coal-field.
4'. Carboniferous grits,
6. Great Scar-limestone.
7. Old Red Conglomerate.
d. Calcareous slate with Orthis Actonice, &c. (as in fig. 3), penetrated by two veins of felspathic
rock .much exaggerated in the Section. .
e. Greenish slate (as in fig. 3).
foot of Kingsdale, crosses the Craven fault, and then passes, over the
dislocated limestone, to the beds which are prolonged into the Black
Burton coal-field. The Ingleton Beck section (fig. 4) crosses the
same groups of strata ; and, if pictorially represented, would show a
deep gorge cutting through the slate-quarries. In fact, the section
descends from the great Scar Limestone to the slate-quarries on the
west side of the rivulet ; but the quarries cross the rivulet, and the
section is then taken up (at about a hundred yards distance) on the
opposite side, and so taken down to Ingleton, on a nearly parallel
line. There is, however, no ambiguity whatsoever in the order of
superposition, which is correctly given in the section (fig. 4). The
dips are the same in the two sections under notice *, but they are
represented, as they are seen in nature, from opposite points of view.
(1.) At the north end of the two sections the Scar-hmestone is
nearly horizontal, and the upper surface of the slate groups has been
worn down to a nearly horizontal surface.

• The mean dip being about S.W. or S.W. by S., and at a great angle.