HAWKESWORTH : SOME DRIFT DEPOSITS >'EAR LEEDS. 459 
200-foot contour (see E on map). It exposes quite 20 feet 
of coarse sandy gravel, without reaching solid rock. It is very 
full of pebbles and stones of all sizes, some pieces of sandstone 
being as much as 2 feet square, and quite angular. There is 
little evidence of bedding or arrangement, the stones, large and 
small, being scattered most irregularly throughout the mass. 
In the north-west corner the deposit becomes more sandy, 
with coaley bands, fewer stones, and is more clearly current- 
bedded. 
The Contained Stones. 
With one or two exceptions, which further investigation 
may eliminate, both patches yield similar pebbles or boulders. 
The great majority are Coal Measure rocks — grits, sandstones, 
ganisters, and ironstone nodules. Millstone Grits and large 
quartz pebbles, probably derived from them, are present. There 
is a great number and variety of cherts, mostly in small squarish 
pieces, but with the angles sufficiently rounded off to indicate, 
in such a hard substance, tliat they have undergone considerable 
knocking about. Carboniferous Limestones are less common, 
leading one to infer that many of these must have been com- 
pletely destroyed in the course of their journey from the source 
of origin. A fine piece of Syringopora, with the matrix entireh^ 
dissolved out, was found in the John o' Gaunt section, from 
which also were taken a number of small, very hard, and re- 
markably smooth rounded pebbles of fine grained crj^stalline, 
Carboniferous (?) Limestone, of quite a distinct character from 
any which have yet been noticed in the other sections. A few 
Silurian or Ordovician rocks have been found in both patches, 
but mostly at Oulton. Xo distinctly igneous rocks have been 
found, but one or two doubtful ones, one perhaps a quartz- 
porplwry, are awaiting microscopic examination. 
Other Deposits to the Northward, between Aire and 
Wharfe. 
Seacroft. — In making a manhole in connection with a 
sewer in 1904, about 250 feet above O.D., rounded boulders 
of ganister and sandstone were brought out (see F on map). 
