FOX-STRAXGWAYS : NOTES ON COAST SECTIONS. 357 
South of Scarborough the Grey Limestone occupies the shore 
as far as White Nab. It consists chiefly of grey calcareous 
shales with nodular bands, in which Gervillia acuta, Ostrea 
Jlabelloides, Avicnlar hraamhuriensis, and other fossils are very 
abundant. In the Scarborough Museum are some of the bones 
of C etiosauru>i, obtained from these shales. Between White Nab 
and Osgodby Nab the shore is occupied by the sandstones of 
the Estuarine Series, but at the latter point a large fault has 
brought up the Millepore Bed, which is well exposed in this 
headland, and contains the characteristic bryozoan Cricopora 
(Millepora ) straminea in great numbers on the surface of the rock. 
We now enter Cayton Bay, on the south side of which 
is the magnificent section of Red Clifi'. Here nearly the whole 
of the Oxfordian beds are again exposed in one of the grandest 
sections of the Yorkshire Coast. At the top the Lower Cal- 
careous Grit rises in a beetling crag, beneath which the Oxford 
Clay forms a somewhat less precipitous slope, the Kellaways 
Rock occupying the base of the clitF, while the Cornbrash forms 
a ledge on the shore. The altitude of this cliff is over 250 feet, 
of which 120 feet are included in the Oxford Clay, and 35 feet 
in the Kellaways Rock. At the eastern end of this cliff 
a fault, having a throw of 120 feet, brings up the Lower 
Oolite, so that the Grey Limestone and Millepore Bed crop out 
on the shore, and may be followed along the scars throughout 
Gristhorpe Bay. The Grey Limestone is here reduced to about 
3 feet in thickness, and may be easily overlooked ; but the 
Millepore Bed is a strong massive rock, forming the outer part 
of the scars, and protecting this part of the coast from the 
force of the waves. Between these two the celebrated plant 
bed of Gristhorpe occurs, beneath which are some thickness of 
beds of a semi-estuarine character which are not known to occur 
elsewhere. The cliffs of Gristhorpe Bay show exposures of the 
Kellaways Rock and Cornbrash, the former much reduced in 
thickness. 
