ODLING : CORRELATION OF THE UPPER AND MIDDLE OOLITES 285 
plete, apart from the renewal of the supply by the absorption of 
rainfall, but, at Eoulston, a large area of " Kellaways "is in contact 
with the very porous Corallian, which would consequently act as a 
catchment for maintenance of the supply. 
The Oxford Clay brought up from the borehole yielded to Mr. 
Odling's scrutiny fossils of Oxfordian type. 
Appendix II. 
NOTE ON THE STRATIGRAPHY OF ROULSTON SCAR. 
BY M. ODLING, M.A., B.SC, F.G.S. 
A short visit to Roulston Scar in December, 1917, yielded the 
following information : — 
(1) Towards the northern end of the Scar the break between the 
Calcareous Grits and the underlying Kellaways , is sharply defined ; 
the Corallian consisting of a fine-grained non-ferruginous grit contrasting 
with the ochre-coloured Kellaways. Towards the southern end, 
however, this junction is not so readily seen, the lower beds of the 
Calcareous Grits being largely ferruginous. 
(2) The top of the Kellaways appears ro be ever}^'here marked 
by a bed consisting largely of rolled fra-gments of Belemnites together 
with smaller nodules ; the nature of this deposit forcibly calling to 
mind the two beds of rolled fossils and phosphatic nodules in the Gault 
and pointing to pene-contemporaneous erosion. 
(3) The general section below the Calcareous Grits is approximately 
as follows : — 
Ferruginous sandstone, shrly in parts, crowded with water-worn 
fragments of Belemnites, apparently belonging to the following speci'^s : 
B, ahhreviatus and B. oweni, 4 to 6 inches ; ferruginous sandstone, 
unfossiliferous, about 1 foot ; ferruginous sandstone, fossils 
abundant but very badly preserved, Trigonia allied to T. clavellata, 
PeGten inaequicostatus and P. demissus, Hinnites sp. together with a 
few fragments of belemnites and unrecognisable fossils, about 10 inches. 
[From apparently the same bed at the southern end of the Scar 
