6i 
SECTIONS IN COAL -SEAMS AT TRUNCLIFFE GATE, 
ODSAL, NEAR BRADFORD. 
Excavations are being carried out by the Bradford Corpora- 
tion in a scheme for the widening of the Huddersfield Road, 
and they bring out certain interesting details. Mr. Jenkinson, 
the engineer in charge, permitted me to obtain the following 
details in October last. 
Truncliffe Gate is on the Huddersfield Road, about 2 miles 
south of the centre of Bradford, and at a height of about 700 
feet, just below the water-divide of the Aire and Calder valleys. 
The top of the ridge is composed of Oakenshaw Rock, one of 
the principal sandstones of the Lower Coal Measures in this 
district, and the excavations are made in the shale lying at 
the base of this Rock. Towards the base of the Oakenshaw 
Rock, and towards the top of the underlying shale, the Geo- 
logical Survey mark two workable coal seams — the Carr House 
Coal and the Black Bed Coal respectively (see sheet 216, 6 in. 
Geol. Map) — and in other parts of the district they mark 
three minor seams, but these are not mapped as present in 
the area under oonsideration. The beds in this district are 
practically horizontal over a fairly wide area. 
The position and nature of the excavations can be seen 
from Fig. 1. They lie between the Fox and Hounds Hotel 
and the Truncliffe Hotel, and present three indentations into 
the side of the road. They have disclosed a seam of cannel 
coal about 8 ins. thick when it is normally developed, and 
of fairly good quality. The coal is well jointed and runs 
horizontally. It overlies green sandy shale, the bottom of 
which is not exposed, and is overlain by dark grey shale. 
Both these shales are very well bedded, and in their normal 
development give horizontal bedding. The proximate analysis 
of the cannel coal is as follows : — - 
The coal is evidently one of the minor seams marked in other 
parts of the district, but not mapped here. 
The main point, however, is that there is here one of the 
finest examples of a split coal seam that could be desired, and 
the four sections shown, Figs. 2, 3, 4, and 5 indicate the nature 
of this abnormality. The coal seam as exposed in the faces 
parallel to the road is about 8 ins. thick, but on being traced 
towards the road it decreases in thickness to about 6 ins., 
J. A. BUTTERFIELD, M.SC., F.G.S. 
Moisture 
Volatile Matter 
Fixed Carbon 
Ash 
99.99 
1922 Feb. 1 
