DESCRIPTION OF THE SECTIONS. 



725 



PLATE 37,. 



(Dudley, Wolverhampton, Wallsall and Lickey.) See pp. 463 to 508. 

 Fig. 1. Great transverse section across the coal-field of Dudley, from the Lower New Red Sand- 

 stone of Sandwell Park on the east, to rocks of the same age near Kings' Swinford on the west ; 

 showing an upcast of the coal at each flank of the field, by which the intermediate tract 

 of carboniferous strata is exposed. Domes of Wenlock Limestone, near Dudley, rise through 

 the coal measures, thus separating one portion of the field from the other; and the same rock, 

 when not upraised, is found beneath the coal at Dudley Port. See Map and woodcuts, p. 464. 



The Lower New Red Sandstone of West Bromwich has been penetrated by the Earl of 

 Dartmouth, and at a depth of more than 300 yards, coal 10 to 12 feet thick was found beneath 

 it, though in a troubled condition, and with some protrusions of trap. This spot is three- 

 quarters of a mile distant from what was in ancient times considered the limit of the coal-field. 

 Since the plate was engraved Lord Dartmouth has met with the \0-yard coal under the red 

 sandstone, by driving works westwards or towards the coal-field. See Appendix, p. 728. 



The precise character of the eastern boundary fault of the old coal-field is taken from a shaft 

 section of Mr. G. Bennett, The faults forming the Dudley trough are traversed obliquely. To- 

 wards the western edge of the field the trap of Barrow Hill rises in a conical form, with 

 radiating dykes, the coal strata on its flanks being dismembered and altered, and the tract be- 

 tween it and Kings' Swinford powerfully affected by faults. See woodcut, p. 500. 



Coal has not yet been worked beneath the Lower New Red Sandstone of Himley and Kings' 

 Swinford, on the western side of the field, but trials to reach it are now in progress. In this 

 section, the 10-yard and lower coal, as well as the underlying Silurian Rocks, are exhibited. 

 See pp. 464, 487, 480 et seq. 

 Fig. 2. From the coal-field near Tipton, across Kettle Hill and the Wren's Nest, showing a dome- 

 like elevation of the Wenlock Limestone, and the lower carbonaceous sandstone and grit of 

 Gornals resting on Silurian shale. 



To the west, the Ludlow Rocks rise at Turner's Hill, flanked by a thin band of poor coal 

 measures, which is overlaid by the Lower New Red Sandstone of Himley. See pp. 464 et seq. f 

 482. 



Fig. 3. From the New Red Sandstone of the Barr Beacon on the east, to the Lower New Red near 

 Wolverhampton on the west ; exhibiting Wenlock Limestone and shale near Wallsall, which 

 plunging rapidly beneath the coal measures, constitute the "limestone" or boundary (i fault." 

 The trap of Pouk Hill appears in the centre, with highly dislocated strata on its flanks. The 

 western edge of the coal-field is marked by a peculiarly oblique fault, as proved near Wolver- 

 hampton. 



The iron-stone and lower coals are alone displayed in this portion of the coal-field. See 

 pp. 464 et seq., 480, 489, 503. 

 Fig. 4. From the edge of the 10-yard coal-field near Ettingshall on the east to the New Red Sand- 

 stone west of Sedgeley, exposing the gradual outcrop of upper and lower coal measures on 

 slopes of Upper Silurian Rocks. The latter rising into undulating and broken domes, throw 

 off to the west a thin band of coal measures, which is surmounted by conformable Lower New 

 Red Sandstone. The Ludlow Rocks are well exposed in Sedgeley Beacon and Turl's Hill, in- 

 cluding a course of Aymestry limestone. The Wenlock Limestone is fully developed in the 

 southern end of Hurst Hill, and in a highly dislocated condition. See pp. 481, 487. 



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