337 
GEOLOGICAL NOTES ON A DEEP BORING NEAR SELBY. 
BY H. ST. JOHN DURNFORD, M.INST.C.E. 
[Read November, 1907. Manuscript received, I'^th December, 1907.) 
The writer believes there has been more than one deep 
boring put down in the neighbourhood of the old town of Selby, 
but in some instances no record has been pubhshed of the results 
obtained, either on account of carelessness or because the under- 
takers of the boring wished to keep the information obtained 
to themselves. Fortunately, in the present instance, the owner 
of the land on which the boring was situated, the Rt. Hon. the 
Earl of Londesborough, who bore the expense of the experiment, 
has made no such stipulation, and as a careful record of the 
strata passed through in the boring was kept, the information 
is open to those who may be interested in such an undertaking. 
The results from a practical point of view are not insignificant, 
and from a geological standpoint most interesting. 
The position of the borehole can be seen by reference to 
the map accompanying these notes (Fig. 1). It is situated 
towards the south-east of the Great Plain of York on the right 
bank of the River Ouse, three miles east-south-east of Selby. As 
is well known the stratigraphy of the Plain of York is obscure, 
the surface being covered for the most part with alluvial drift 
which, although valuable and useful from a farmer's and land- 
owner's standpoint, is often somewhat disconcerting to the 
geologist. In the immediate neighbourhood of Selby, however, 
two landmarks stand out, known as Brayton Barf and Hambleton 
Hough. These two eminences, neither of which rises more than 
125 feet above the surrounding plain, are conspicuous objects 
from afar. They are exposures of the Triassic Sandstone, crop- 
ping up from under the superficial alluvium, and in going east 
from Leeds are the first evidences of the Trias to meet the eye. 
At the foot of the larger hiU of the two — Brayton Barf — thef 
Selby Corporation have recently put down a borehole in con- 
nection with their water supply, which hole has been carried to a 
depth of about 600 feet and yields a considerable feeder of water. 
