50 HULL SCIENTIFIC AND FIELD NATURALISTS’ CLUB. 
they are much more waterworn. They have unquestionably been 
formed by local melting of the ice, sub-glacial streams, or other 
similar agency. Striated stones are sometimes found in them, 
though the scratches are usually partially obliterated, apparently 
on account of their having been waterworn alter being scraped 
and scratched in the ice. 
Gravels of this description do not occur in very extensive beds. 
Near Brough a series of gravels occurs, as to the origin and age 
of which there is no clear evidence. ‘There are two sections ; one 
on the summit of Mill Hill at an elevation of 100 feet, and the 
other, Prescott’s pit, on the low ground to the west. 
On Mill Hill there are apparently two distinct gravels. The 
lower one, exposed only in places at the base of the section, is 
composed of blocks of carboniferous sandstone and other material 
derived from the west, partially cemented together, thus forming a 
somewhat compact bed. In this are found bones, horns, teeth, or 
other remains of a great variety of animals. Amongst the 
specimens in my possession, bones, etc., of the following have 
been recognized* :— 
Llephas antiguus (Straight tusked elephant), 
Llephas primigenius (Mammoth), 
Bison priscus (Bison), 
Bos primigenius (Urus of Ceesar), 
Cervus elaphus (Red Deer), 
Cervus sp? 
Liquus cabatlus (Horse), 
It is a somewhat difficult matter to fix the exact age of this 
bone-bearing bed. ‘There is little evidence, beyond the mammalian 
remains, to go by. The absence of boulder-clay in the immediate 
vicinity is unfortunate, as it renders the task of correlation very 
difficult, and the results uncertain. At present I should not ‘like 
to express any definite opinion as to the age of the bed. Of one 
thing, however, we can be certain, it is older than the gravel 
above it! 7 
Let us now deal with the upper gravel of this section. This is 
* Thomas Sheppard. ‘Notes on Elephas antiquus and other Remains 
from the Gravels at Elioughton, near Brough, East Yorkshire.” Proceedings 
Yorks. Geol. and Polyt. Soc., 1897, p. 225. 
+ Since these notes were prepared I have found a large boulder of 
Rhomb-porphyry on the floor of the Mill Hill pit, together with several other 
boulders which had been obtained from the gravel, and though the exact 
horizon in the gravel from which the rhomb-porphyry came is uncertain, the 
find is of importance, and should be kept in mind when considering the 
question of the age of the gravels. Later still, Mr. J. W. Stather, F.G.s., has 
secured a specimen of Augite-syenite—another typical Scandinavian rock-— 
from the same locality. 
