95 
The 5 feet of gravel below tlie soil and earth, is composed 
of rounded sandstone boulders, derived from the rocks of the 
immediate neighbourhood. The lower part gradually becomes 
a yellow colour, due to the impregnation of water holding iron 
in suspension. Below this the sandstone deposit is decidedly 
ferruginous, and contains many stems of large trees, lying in 
a horizontal position. They have no smaller branches attached, 
but appear to have been much washed and rolled in the 
water before finding their present resting-place. The sand and 
pebbles present a stratified appearance, and bear an aspect of 
being deposited by water in motion, but from the inconstancy 
of the beds, the yellow and grey shingle dove-tailing into 
each other at short intervals, yet still preserving distinctive 
lines of stratification, we are led to the inference that they were 
deposited in an estuary subject to strong tidal currents. 
The yellow drift gradually gives place to a grey, which 
is also principally composed of local sand and boulders, with 
an admixture of fragments of coal and shale; but besides 
these there are about 2 per cent, of foreign boulders, being 
most numerous near the base. Below this seven or eight 
feet are exposed, consisting almost entirely of rocks derived 
from the primary strata of the Lake District. The base of 
the drift was not reached. [Examples.] 
A well sunk in Dewsbury has exposed a much greater 
thickness of boulders than has hitherto been reached, and 
presents the following section :~ 
1. Earth and sandy sub-soil . . . . . . . . 7 ft. 6 in. 
2. Boulders, consisting principally of sandstone 
gradually merging into . . . . . . 24 0 „ 
3. Boulders nearly all of crystalline rocks. . . . 6 0 „ 
4. Clay, with sand and boulders . . . . . . 5 „ 0 ,, 
5. White rock, of carboniferous formation . . 11 0 „ 
and other crystalline rocks in the cutting for the railway at Hebden Bridge. 
Mr. Clay, of Eastrick, also read a paper, in 1841, to the Society, on a bed 
of boulders containing granite at Cromwell Bottom, between Elland and 
Brighouse. 
