395 
ON A PECULIAR DISPLACEMENT IN THE MILLEPORE 
OOLITE NEAR SOUTH CAVE. 
By J. W. Stather, F.G.S. 
A section in the Millepore Oolite on the Hull and Barnsley 
Railway, close to South Cave Station, and on the south side of the line, 
was described in 1883 by Keeping and Middlemiss* as follows : — 
The cutting now entered is twelve feet in the highest part and 
792 feet long. The rock is uniform in character — being a characteristic 
well-bedded Oolite, quite like the Millepore Oolite of the Howardian 
Hills. Oolite grains form the mass of the rock." 
The beds of this cutting have been recently excavated on an 
extensive scale by The Grey Stone Company, Ltd., and the quarrying 
back of the limestone has revealed some unexpected features. 
The most important of these is the occurrence of an irregular band 
of flinty and chalky rubble-drift, beneath a mass of displaced Millepore 
limestone, partly shattered, but in some places maintaining its original 
bedding, so that except for the evidence of the section it might have 
been regarded as in situ. 
The Millepore Oolite and Estuarine Sands. 
In working back into the hill, the section rapidly increased in 
height, and the sands of the Estuarine Oolite and Kellaways Rock,t 
normally overlying the Millepore in this district, set in at the top, and 
in some parts of the section rapidly attained as much as 14 feet in 
thickness. The sands appeared to be disturbed, and were unevenly 
distributed, in some places occupying hollows in the underMng 
Millepore, apparently due to displacement of some kind. The Millepore 
Limestone itself shewed unmistakable signs of disturbances, for, 
though the main lines of bedding are well maintained, they are almost 
throughout the section bent and shattered, shewing open joints, cracks 
and large cavities. It seems likely that this condition is due to irregular 
slipping of the Millepore beds down the hillside into Drewton Valley, 
and this explanation becomes all the more probable when we remember 
that the Millepore Limestone is here underlain by wet and slippery 
* GeoL Mag., dec. 11. , Vol. X., p. 216. 
t Fox-Strangways, Jurassic Rocks of Britain — Yorkshire, Vol. I., 
pp. 260 and 290. 
