DAVIS : SECTIONS IN THE LIASSIC AND OOLITIC ROCKS OF YORKSHIRE. 171 
Chalk Wolds. The Chalk has a general dip to the south-east of two 
to five degrees, but in several places this is interferred with by lines 
of faults, and contortions. The Chalk escarpment, after extending 
eastwards from Flamborough Head to North Grimston and Achlam 
Brow, takes a southerly direction to the Humber, enclosing the 
luxuriant plains of Holderness, a basin-shaped hollow filled with 
glacial and more modern deposits. It is thus seen that, as has been 
found to be the case in the primary rocks of the western uplands of 
Yorkshire, the "Wolds and hills of the easterly portion of the County 
exhibit the highest or most recent strata occupying the inner 
margins of the basin ; these are surrounded by the older series 
which successively rise from underneath, and occupy constantly 
enlarging circles, the lowest, the Lias, underlying and surrounding 
the whole. Whilst this general conformity can be traced through- 
out the series of strata, there are several foldings and dislocations 
which interfere with it, notably in the lower beds of the Lias and in the 
Chalk. The principal lines of disturbance in the Chalk have generally 
an east and west direction. One of the finest exhibitions of distorted 
strata occurs at Scale Nab, in the Bempton Cliffs, half way between 
Flamborough Head and Speeton. The cliffs are 250 feet in height, 
and the Chalk is folded repeatedly. Photographs of this magnificent 
section were issued to the members of the Society in the year 1885, 
and a brief description was printed in the Proceedings of the same 
year. The line of disturbance is indicated on the map of the 
Geological Survey as proceeding due west a little north of Wold 
Newton and Foxholes, and about midway between Sherborn and 
Weaverthorpe. In the railway cutting near Hunmanby the Chalk is 
brought by a fault into juxtaposition with the Neocomian beds of 
Speeton. 
The general dip of the beds is towards the south, but there are 
variations. Southwards from Robin Hood's Bay the rocks have the 
normal dip, but about the middle of the Bay they are observed to 
form an anticlinal and roll over with a strong northerly dip. The 
anticlinal extends inwards from the coast through the middle of 
Eskdale ; evidence of it may be seen in the Lower Lias Shale on the 
south bank of the river in the Blue Scar. The anticlinal crosses the 
