196 davis : sections in the ltassic and oolitic rocks of yorkshire. 
Section at Blea Wyke Point. 
Ft. In. 
Flaggy sandstone with Myacites in great numbers 
along the lines of bedding : Avicula Braamhuriensis 
and a small Pecten abundant in the lower part : 
Pholadom ya Scemanni ? occasionally found ... 15 0 
Sandy shales rather hard at top, with small ironstone 
nodules containing Avicula braamhuriensis ,becomiog 
soft and calcareous in the middle, and harder and 
more calcareous towards the base ; Belemnites 
giganteus occurs somewhat plentifully in this series 55 0 
Calcareous sandstone which weathers into blocks 
with a rounded outline, the outer face often covered 
with stalactite ; many small fossils ... ... 50 
Band of flaggy limestone which weathers easily away: 
A. Braamhuriensis, Pecten lens, and Gervillia acuta 
very abundant ... ... . . ... 2 0 
Hard calcareous shales, with nodules of close-grained 
limestone almost composed of shells ... .. 10 0 
Band of flaggy limestone having the appearance of 
hard calcareous mud ... ... 2 0 
Thin flaggy sandstone with Myacites along the bed- 
ding planes, passing gradually to a sandy shale ; 
casts of a small Pecten are very abundant near the 
base ... .. .. ... ... 15 0 
Total ... 89 0 
From the cliff the limestones extend westwards and abut against 
the fault near Cragg Hall. 
The Moor Grit, the lowest bed of the Upper Estuarine Series, 
rests on the Scarborough Limestone. The whole series of the Upper 
Estuarines have a thickness of about 200 feet, and have a wide ex- 
panse over the moors of the North Riding. Above the Moor Grit, 
which is a massive, jointed sandstone, the Upper Estuarine Series con- 
sists of shale, with an occasional bed of sandstone. The Moor Grit 
forms a conspicuous feature along the hills above Robin Hood's Bay, 
