714 



DESCRIPTION OF THE SECTIONS. 



Fig. 10. From the south end of the Dudley coal-field across the Clent Hills, to prove that the coal- 

 measures pass upwards into the Lower New Red Sandstone in Worcestershire, as well as in 

 Shropshire, the last-mentioned formation being overlaid in both counties, by calcareous con- 

 glomerates. N.B. The thick or 10 yard coal of Dudley is lost by a fault, and has not yet been 

 proved beneath the Lower New Red, though there is little doubt of its existence. See pp. 47, 

 506, and PL 37, figs. 1 and 6. 



Fig. 11. From Apley Terrace on the S.E.^ to Wrockardine on the N.W., traversing in descending 

 order. 1st. Lower New Red Sandstone. 2nd. The coal and ironstone measures of Coal Brook 

 Dale. 3rd. Carboniferous Limestone ; the whole resting unconformably on various members of 

 the Silurian System. Some trap rocks (greeestone, basalt, &c.), penetrate the coal-field, and 

 Other trap rocks (syenite and felspar rock), pierce the Lower Silurian Rocks at the Wrekin, &c. 



The Caradoc Sandstone in contact with the Wrekin trap, is converted into quartz rock. See 

 pp. 61, 103. 



Fig. 12. From Apley on the E.N.E., to Tasley, near Bridgenorth on the W.S.W.j exposing a full 

 development of the Lower New Red Sandstone and its passage downwards, into the upper 

 coal with freshwater limestone. See pp. 61, 100. 



Fig. 13. From Wolverhampton on the east, to Bagley Rough and the Severn on the west j exhibiting 

 a trough of New Red Sandstone between the coal-fields of Staffordshire and Coalbrook Dale. 

 Many granitic and other boulders of northern origin encumber the surface of this tract, 

 The oblique face of the fault at Wolverhampton is specially worthy of remark. See pp. 41, 

 61 3 503. 



Fig. 14. Anticlinal of the Carboniferous Limestone of Lilleshall, in the direction of the chief trap - 

 pean eruptions of the adjacent coal-field, and parallel to the strike of the Silurian Rocks. 



Fig. 15. From Lilleshall House (the new mansion of the Duke of Sutherland) on the east, to the 

 village and hill of Lilleshall on the west 3 pointing out a succession from the calcareous (dolo- 

 mitic) conglomerate of the New Red Sandstone, through the Lower New Red Sandstone, down 

 to the coal-measures and Carboniferous Limestone. The syenitic trap of Lilleshall Hill, 

 penetrates the Lower Silurian Rocks, as at the Wrekin. See pp. 48, 235. 



Fig. 16. From Ketley on the east, to Ercal Hill on the west; showing how the Carboniferous 

 Limestone supports the coal-measures. The coal-measures are much penetrated by trap, and 

 have been affected by powerful faults, the lower coal having been thrown up nearly to the 

 surface in the centre of the field. On the sides of Ercal Hill the Caradoc Sandstone is con- 

 verted into quartz rock. See pp. 103, 110, 233. 



Fig. 17- Section across the Broseley district of the Coal Brook Dale field; showing, as in f. 16., 

 how the coal-measures have been upheaved through the Lower New Red Sandstone, and how 

 they are eventually cut out by the rise of the Silurian Rocks (Wenlock Limestone, &c), and 

 various bosses of trap. The phenomenon of altered sandstone on the sides of the Wrekin, is 

 again exhibited. The faults in this and the preceding figure are inserted by his permission 

 from drawings of Mr. Prestwich. See pp. 110, 233. 



PLATE 30. 



Fig. 1. Section from the Titterstone Clee Hill on the south- west, to the banks of the Severn on the 

 north-east, exhibiting a central axis of Old Red Sandstone. On the south-western side of this 

 axis, the ascending series of strata is unbroken, from the Carboniferous Limestone of Oreton 



