360 MAPS AND SECTIONS. 



Derwent Water, &c.) By J. C. Ward. Alluvium, Carboniferous 

 Limestone, U. Old Red, L. Silurian (Volcanic series, in 3 divisions ; 

 Skiddaw series, in 7 divisions), Granite, Syenite, Felstone, Diorite, 

 Dolerite, &c. Many Mineral Veins and Faults. W. W. 



England and Wales. 14 Sheets of the " Horizontal Sections " of 



the Geological Survey. Scale 6 inches to a mile. 

 Sheet 91. By [Prof.] A. H. Green. No. 1. Section from the upper 

 part of the valley of the River Derwent to the centre of the Yorkshire 

 Coal-held, across the Yoredale Rocks, and Millstone Grit of Broomhead 

 and Whitwell Moors, the Lower Coal Measures of Stockbridge and 

 Wortley, the Middle Coal Measures of Stainborough, .... terminating 

 on Houghton Common. No. 2. Section from S.W. to N.E. across the 

 Yorkshire Coal-basin, crossing the Lower Coal Measures of Hoyland, 

 the Middle Coal Measures of Silkstone .... and terminating at 

 Newton Colliery near Castleford. 



Many divisions of M. and L. Coal Measures, Millstone Grit, and 

 Yoredale Rocks are shown, mostly to a depth of 1000 feet below 

 sea-level. 



Sheet 95. Section from the North-western corner of the Yorkshire 

 Coal-field south of Bingley, across the Lower Coal-measures of Nor 

 Hill .... and Oakenshaw^ near Bradford ; the Middle Coal-measures 

 of Cleckheaton, .... Clayton in the Clay near Barnsley ; and 

 thence over the Permian Rocks .... to the neighbourhood of Don- 

 caster. By [Prof.] A. H. Green, R. Russell, and C. F. Strangways. 



Shows 4 divisions of the Permian, and various divisions of Carboni- 

 ferous rocks, mostly to a depth of 1000 feet below sea-level. 



Sheet 97. Section from the Valley of the Wharfe at Otley, over 

 the Millstone Grit of The Chevin, the outlier of Lower Coal-measures at 

 Rawdon, and the Millstone Grit of Horsforth and Bramley Fall ; thence 

 across the Yorkshire Coal-field by Bramley, .... the neighbourhood 

 of Wakefield, .... and Denaby, to the Magnesian Limestone near 

 Conisborough. By [Prof.] A. H. Green, J. C. Ward, J. Lucas, and R. 

 Russell. 



Many divisions of the Coal Measures and Millstone Grit are shown, 

 mostly to 1000 feet below sea-level. 



Sheet 101. Section from the Millstone Grit, of Blackstone Edge near 

 'Todmorden, Greetland Moor, and North Dean, south of Halifax, over 

 the Lower Coal Measures of Southowram, Brighouse and Clifton ; the 

 Middle Coal Measures of Cleckheaton, Gomersall, Adwalton, and Gilder- 

 some ; the Lower Coal Measures of Gildersome, Churwell, and Beeston ; 

 the Middle Coal Measures, of Hunslet, Osmondthorpe, and Manston ; 

 the Lower Coal Measures of Scholes ; and thence over the Magnesian 

 Limestone of Barwick in-Elmet, Bramham Moor, and Newton Kyme, to 

 the Alluvial Flat of the river Wharfe. By W. T. Aveline, J. R. 

 Dakyns, J. C. Ward, and R. Russell. 



Sheet 102. (Dated 1874 ? not published until 1875.) Section from 

 HeptonstaU Moors north of Todmorden, across the MiUstone Grit of the 



