112 
DAVIS : EXPOSED SECTIONS. 
fault in the Coal Measures throws a ragg'y sandstone, a, against 
the shales, 6, the latter nearly horizontal, the sandstone much 
broken and contorted. West of the sandstone a second mass of 
shales, h i, occur, and these are again thrown into juxtaposition 
with the sandstone, a i, by a second fault. The remaining portion 
of the cutting is in shales, forming an anticlinal, interstratified 
with them, there is a bed of coal, c, six inches in thickness. The 
Magnesian Limestone beds overlie those of the Coal Measures, 
extending a short distance to the west of the principal fault. At 
the base of the limestone is a bed of quicksand, cZ, about six feet 
in thickness, but thinning out towards the fault where it is only 
two feet thick. It is much current-bedded ; and appears in all 
respects similar to the beds of quicksand at Garforth and other 
places. The lower six feet of the limestone is thin-bedded and 
somewhat slaty, above this it possesses the usual character of the 
lower limestone, being thick-bedded and massive, with numer- 
ous cavities lined with crystals of carbonate of lime. 
Eastwards from the Upton section all the exposures are in the 
lower limestone until the tunnel is reached. The latter for a 
considerable distance from either end is quarried from the same 
limestone, but towards the centre of the tunnel coal measure shales 
are again met with. Beyond the tunnel the lower limestone 
dips rapidly eastwards, and above it a considerable thickness of 
the middle marls is exposed in the cuttings. Near the Pack Saddle 
Plantation, where an accomodation bridge crosses the cutting, 
the lower part is formed in the lower limestone, above which 
is about eight or ten feet of Red or Purple Marl. Between the 
two, in hollows on the surface of the limestone are small lenticular 
masses of unctuous yellow clay. (PI. IV., Fig. 2). 
Eastwards from the River Went, near Little Smeaton, the 
middle marls in turn disappear beneath the Upper Limestone. 
The junction of the two may be seen in the cutting about a 100 
yards beyond the river, dipping rapidly eastwards. The marls 
are composed of a yellow sandy clay, with about four inches of 
