408 LAMPLUGH: MAMMALIFEROrS GRAVEL AT ELLOUGHTON. 
is now exposed. The hill, rising out of the low-level flat formed by 
the Humber warps, about a mile from the river, forms an outlier of 
the "Wolds, from which it is separated by a spread of low ground less 
than a mile in width. It is made up of solid Jurassic beds with a 
capping of gravel." 
The following section was exposed in the pit at the time of my 
visit, and it may stand as a type, for though the beds have varied in 
thickness during the excavation they have remained essentially 
unaltered. 
Surface 
X 
A 
B 
Figure 1. Scale. 10 feet to an inch. 
X Top-soil etc. ... .. ... ... 2^ feet. 
A Rough stony gravel with some sand . . . about 9 feet. 
Containing pebbles of flint, sandstone, red chalk, oolite 
limestone, and other local rocks; also a few well-worn 
erratic pelibles of felstone, quartzite, etc. ; also rolled 
lumps of clay ; and thin seams of clay, and of car- 
bonaceous matter, 
B Yellow sand with stony layers. ... about 5 feet. 
Stones similar to those in gravel above ; the mam- 
moth's tusk and other animal remains found in this bed. 
O Hard grey clay, probably belonging to estuarine 
oolites ... thickness uncertain (see note.) 
* The workmen in the pit gave me the following particulars of a well f^unk 
to supply Mr. Lyon's new house on the brow of the hill. 
6 inches dirty gravel. 
1 0 feet clean clay. 
1 ft. 6 in. soft sandstone rock. 
Black shaly clay. 
In this section all except the top item seem to belong to the oolites, but it is 
difl&cult to say what beds they represent. The ' soft sandstone ' may be the 
Kellaways Rock — but if so, it is remarkably thin here — and the clay below, the 
Great Oolite Clay. 
