234 LAW AND SIMPSON : DRIFT DEPOSITS AT MYTHOLMROYD. 
field between the Cragg Vale Brook and the south side of the 
railway embankment, this being thought likely to give more 
satisfactory results than would be obtained by sinking from 
the surface. 
By enlisting the aid of the tenant of the farmland, two 
short drifts were duly cut, running well into the rising terrace 
which in this field presents two tongues of escarps with a small 
embayment between ; a section was cut into each of these 
tongues. 
In one cutting (Fig. 1), the southerly one, the drift deposits 
were found to rest upon the undisturbed shale, the line of 
junction being traceable by springs ; tlie shales were dipping 
almost linable with the terrace edge contour, and the cutting 
therefore was made in a series of three steps for about 15 feet 
in, where a clear face of 8 feet deep by about 3 feet 9 in. 
wide of drift was exposed. 
In the north cutting (Fig. 2) the shales were avoided by 
commencing a little higher up, and a section was exposed about 
12 feet into the terrace ending in a 7 feet face. 
Two or three tons of boulders were got out, varying in 
size from about 12 in. long to pebbles of 1 in. 
The great bulk were local grit stones and galliard, but 
some 4 or 5 cwt. were laid aside for further examination, and 
75 boulders were later brought away for careful examination; 
these varied in size from about 6 in. by 4 in. by 3 in. to 
pebbles of H in. long. 
A careful examination of the boulders brought away has 
been made, with the help of Messrs. J. H. Howartli and H. B. 
Muff, and they were found to consist of and be in the following 
numerical proportion : — 
Galliard or Gannister .. 
Granopliyres 
Andesites 
B hyolites 
Silurian Grits ... 
18 
18 
10 
