78 SECTIONAL ADDRESSES 
Walsall and Tamworth, and so divides an Uttoxeter-Burton-Lichfield 
basin from the Birmingham-Stratford syncline to the south. 
The Warwickshire Coalfield is an open syncline two to seven miles wide, 
which widens as it pitches down toward the south. Between Kenilworth 
and Coventry it contains over 4,000 ft. of pre-Trias red beds, the thickest 
development of Upper Coal Measures known in Britain. It is elevated 
somewhat above the level of the Birmingham syncline, from which the 
Productive Measures are separated by the crest of Cambrian rock which 
outcrops at Dost Hill. ‘Towards the east the Warwickshire Coal Measures 
rise sharply with the Nuneaton ridge of Cambrian and Pre-Cambrian, 
over and against whose east-facing side the Leicestershire Trias banks 
and overlaps. This spread of Trias is continuous with that of Lichfield 
and the Trent Valley, but whereas as far as the western margin of the 
Warwickshire and South Derbyshire Coalfields the Lichfield trough 
contains a great thickness of Red Upper Coal Measures underneath the 
Trias, the Cambrian and older rocks of Leicestershire form a diversified 
upraised platform and upon it the Bunter is overlapped by Keuper. 
Across the Leicestershire platform, shallow folds of variable pitch strike 
in a general north-westerly direction towards Dovedale and the conver- 
gence of North Staffordshire, in parallel with the south-west edges of the 
Peak. On it, en echelon on either side of the south-east-pitching Ashby 
anticline, lie the coalfields of South Derbyshire and Leicestershire, each 
six or eight miles long and containing about 1,500 ft. of rich Productive 
Measures across which the Trias rests directly. ‘The structural boundary 
of the Leicestershire Coalfield towards Charnwood is peculiar. For 
miles it is a steep fold, broken by a fault, the fissure being occupied by an 
igneous intrusion. But as the fault bends round north-westward it cuts 
across the pitch of the folds, and, whereas on the coalfield side with east- 
ward dip older rocks appear in order northward from under the Coal 
Measures, on the Forest side towards the north the Pre-Cambrian is 
succeeded by Carboniferous Limestone; and west of Melbourne, where 
Millstone Grit is overlain by Trias, this powerful boundary fault has lost 
itsthrow. Movements along this fault were completed before the overstep 
of the Trias. 
CONCLUSION. 
In the assembly of this information I have noted many structural 
associations the significance of which has not been elucidated. The 
plotting of formational thicknesses of strata by zones has confirmed the 
Midland Province as a structural unit of deposition. Examination of 
Coal Measure stratigraphy has proved its slow development as a Coal 
Measure geosynclinal basin which was everted before Permian time. In 
cross-section the folding of the Province is duplex in all directions, and 
in general it is now a synclinorium with a central lop-sided crumpled 
dome. This bifid, asymmetric elevation, which is the central Pennine 
fold, divides the eastern coalfield from a western, more deeply depressed, 
Trias-filled syncline, and within the fork of double uplift is Staffordshire 
and the fingering coalfields of the Midlands. 
The narrow folds which compose the western branch of the Pennines 
