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barrassing, and render exact results difficult of attainment. 
The frequently jointed and fractured appearance it assumes, 
together with its occasional oblique lamination, serves to 
increase the difficulty in deciding the question of identity as 
to this triple series, when remotely situated, and perplexes 
any determination as to the dip or inclination of strata. 
A part of the parish to the East, I apprehend constitutes 
a variation of the upper group of the millstone grit and shale 
series ; I conceive also, that this town rests on the middle 
term, with an outcrop of large square pebbly blocks at Wood- 
house scar to the W.S.W., and Birks Wood on the N. W., 
whilst the sides and bed of our far great Western valley are 
formed of alternating Craven shales and grits, surmounted by 
thin limestones and the lower and middle millstone groups, 
the mountain country of Studley Pike to the West, and 
Great Bouldsworth to the North, completing the uppermost 
member, and so crowning the entire series at the summit of 
drainage along the boundary of the county. 
Thus we may, perhaps, be considered to be allied to and 
comprehended in the second and third members of Phillips's 
N. West Yorkshire Series, viz,, the Millstone grit, and what 
he terms the Yoredale Rocks. 
Situated to the westward of the proper coal tract of the 
West-Riding, the parish of Halifax, if not so fertile in its 
agricultural surface, nor so largely enriched with underground 
mineral stores as some more favoured districts, is neverthe- 
less, to the Geologist, a region of some interest. Its physical 
aspect is bold and mountainous, whilst the deeply excavated 
sloping valleys contrast well with the outlines of the hilly 
ridges. The seams of coal are condensed and thin, but the 
quarries give employment to 1,200 persons, and furnish 
large supplies of the various kinds of freestone, flagstone, 
and slate of superior quality, not to mention the copperas 
