MAPS ATfD SECTIOITS. 359 



DumTDarton. Sheet 25 of the Geological l:^iirvey Map. Scale 6 inches 



to a mile. By B. N. Peach and R. L. Jack. (Condorrat, Twechar, 



and E. part of Kirkintilloch.) 



Carboniferous Limestone and Millstone Grit. In the former, outcrops 



of limestones, coals, and ironstones. Intrusive Basalt-rocks in sheets, 



and E. and W. Tertiary dykes. Boulder Clay, Sands and Gravels, Silted- 



up lakelets, Peat bogs. R. L. J. 



Durham. 7 Sheets of the Geological Survey Map. Scale 6 inches 

 to a mile. 



Sheet xvi. Hunstanworth. By David Burns. Alluvium ; Boulder 

 Clay ; Millstone Grit (2 grits and shale) ; Yoredale Rocks (9 or 10 

 divisions, of shale, limestone, &c., with 2 beds of coal) ; many mineral 

 veins (lead and iron). 



Sheet xxiv. Stanhope. By David Burns. Alluvium ; Old River 

 Gravel (2 terraces) ; Glacial Gravel and Boulder Clay ; L. Coal 

 Measures ; Millstone Grit (3 grits, 2 shales) ; Yoredale Rocks (sand- 

 stones and shales, with 5 limestones) ; Basalt ; Mineral veins (lead and 

 iron). 



Sheet xxxii. Five Pikes, etc. By David Burns. Alluvium ; Old 

 River Gravel (2 terraces) ; Glacial Gravel and Boulder Clay ; Lower 

 Coal Measures ; Millstone Grit (3 grits, 2 shales) ; Yoredale Rocks 

 (sandstones and shales, with 6 limestones) ; Mineral veins (lead, iron, 

 and copper). 



Sheet xxxiii. Hamsterley, Witton-le-Wear. By H. H. Howell. 

 Alluvium ; River Gravel ; Glacial Gravel and Boulder Clay ; M. and L. 

 Coal Measures (with outcrops of coals) ; Millstone Grit (3 grits, 2 shales) ; 

 Yoredale Rocks (with Fell-top Limestone) ; Basalt. 



Sheet xxxiv. Willington, Byers Green. By H. H. Howell. Alluvium, 

 Old River Gravel ; Glacial Sand and Gravel ; Boulder Clay ; Magnesian 

 Limestone ; M. and L. Coal Measures (with outcrops of coal) ; Basalt. 



Sheet xli. Cockfield, etc. By H. H. Howell. Alluvium ; Gravel 

 and Boulder Clay ; M. and L. Coal Measures (with outcrops of coals) ; 

 Millstone Grit (3 grits, 2 shales); Yoredale Beds; Basalt. 



Sheet xlii. Bishop Auckland, West Auckland, New Shildon. 

 By H. H. Howell, xilluvium ; Gravel and Boulder Clay ; Permian 

 j(Magnesian Limestone and Yellow Sand) ; M. and L. Coal Measures 

 (with outcrops of coals) ; Basalt. W. W. 



England and Wales. 3 Sheets of the Geological Survey Map. Scale 

 an inch to a mile. 



Sheet 18. New Edition. By H. W. Bristow, H. B. Woodward, and 

 W. A. E. Ussher. The new points are the results of a re-survey of the 

 N.W. corner, including the addition of the Penarth Beds and Gravel, 

 besides a revision of Alluvium-lines. 



Sheet 82, N.E. (Worksop, Bawtry.) New Edition. By A. H. Green 

 and T. V. Holmes. With corrections of the Carboniferous part at the 

 W. edge. 



Sheet 101, S.E. (Keswick ; Skiddaw, Helvellyn ; Crumnock Water, 



