Xll ILLUSTRATIONS. 



EXPLANATION OF MAP. 



The Map is coloured to show the superficial extent of the principal geological 

 systems. The Cambrian and Silurian rocks are classified according to hedgwick, 

 so that under the former term are included the Lower Silurian strata of Murchison, 

 now frequently termed Ordovician. The New Red Sandstone includes the 

 Permian and Triassic strata, and some areas previously regarded as Permian, but 

 now believed to be stained Carboniferous rocks, are coloured in accordance with 

 this view. Some additional areas of Pliocene strata are shown ; the Drift deposits, 

 which cover so large an area of the Eastern, Midland, and Nortliern counties, are 

 omitted, as they cannot be accurately shown on a map of so small a scale. F"or 

 the same reason many Eruptive rocks are omitted. The geology is based on the 

 published maps of the Geological Survey. 



ILLUSTRATIONS. 



PAGE 



Hunstanton Cliff, Norfolk. (From a Photograph by G. Barrow.) See pp. 



379, 407, 408 Frontispiece 



The Cheddar Cliffs, Somersetshire. (From a Photograph.) See pp. 159, 



604 30 



Fig. I. — On the Frome, near Stoborough, Wareham, Dorsetshire. (Alfred 



Dawson, p. 161.) i 



2. — Cutting near Uphill (Bristol and Exeter Railway) 14 



3. — General Section across England and Wales 25 



4. — General Section of the Malvern Hills. (Prof. Phillips, Mem. 



Geol. Surv. ii. Part i. p. 50.) 3' 



5. — Diagram Section E. and W. across Bryniau Bangor, Caernarvon- 

 shire. (Prof. Hughes, P. Geol. Assoc, viii. 197.) 42 



6. — Section across the Wrekin, in Shropshire. (Dr. Callaway, Q. J. 



xxxiv. 756, XXXV. 649.) 44 



7. — Penrhyn Slate Quarry. (From a Photograph.) 47 



8. — Section near Bangor. (Prof Hughes, Q.J. xxxiv. 139.) 54 



9. — Section of the Eastern Slope of the Longmynd, near Church 

 Stretton, in Shropshire. (\V. T. Avelme, Hor. Section, Geol. 



Survey, No. 34 ; Q. J. xii. 247.) 5^ 



10. — Section of Snowdon. (Sir A. C. Ramsay, Mem. Geol. Surv. iii. 



ed. 2, p. 141.) 5^ 



II. — Generalized Section across the Lake District. (J. G. Goodchild.) 79 



12. — Section across May Hill, in Gloucestershire. (Sir A. C. Ramsay, 

 Geol. Assoc, Programme of Excursion to Ledbury, 1S79.) 89 



13. — Section across the Woolhope Valley, in Herefordshire. (Prof. 

 Phillips, Geol. Assoc, Progr Exc Ledbury, 1S79.) 89 



14.— Section from Ledbury to the Malvern Hills. (Prof. Phillips, 



Geol. Assoc, Progr. Exc. Ledbury, 1879.) 9^ 



1 5. ^Section across Ludlow. (T. Curley, Q. J. xix. 178.) 105 



16. — Generalized Section across the Cheviot Hills on the Western 



Border of Northumberland. (J. G. Goodchild.) 115 



17— Generalized Section across the Devonian Rocks of North Devon. 115 

 18. — Devonian Slate between Houghton and High Week, Newton 



Abbot. (W. A. E. Ussher, Q. J. xxxiv. 54.) 132 



-Generalized Section from Dartmoor to Plymouth. (After 



Sedgwick and Murchison.) ^37 



. — Diagrammatic Section across the Pennine Anticlinal. (J. W. 



Davis, G. Mag. 1878, p. 504.) I49 



19 



