CONTENTS. 



PAGE 



Introduction i 



Principles of Geology, 3. The Earth's Crust, 4. Sedimentary, Eruptive, 

 and Metamorphic Rocks, 5. Formation of Rocks, 7. Fossils, 9. 

 Sequence of Strata, 10. Thickness of Strata, 12. Bedding, 

 Cleavage, Faults, etc., 12. Subdivisions and Correlation of 

 Strata, 16. Climates, 20. Geological Time, 21. Field Geology, 

 24. Structure of England and Wales, 25. Practical aspects of 

 Geology, 27. Table of Geological Formations, 28. 



PART I. 



Paleozoic 3' 



Archaean 35 



Cambrian 47 



Table shotving the Classification of the older Paheozoic Rocks, 49. Table 

 shotving the general relations between the Cambrian I\ocks of the 

 Lake District and those of Wales, 50. Wales and West of England : 

 Harlech and Longmynd Series, 52. Menevian Series, 59. Lingula 

 Flag Series, 60. Tremadoc Slate Series, 63. Lingula Flag 

 Series and Tremadoc Slate Series : (Malvern Area, 64. Shropshire 

 and Midland Counties, 65. Cornwall, 66.) 



Ordovician (Upper Cambrian or Lower Silurian) .... 66 



Wales, etc. : Arenig Series, 67. Llanvirn Series, 69. Bala Series 

 (Llandeilo Flags, 70. Bala or Caradoc Beds, 71). Lake 

 District, etc. : Skiddaw Slates, 77. Borrowdale Series, 79. 

 Coniston Limestone Series, 81. 



Silurian (Upper Silurian) 85 



Table showing the main divisions of the Sihtrian Strata, 85. Wales and 

 West of England, 86 : May Hill Series, 87. Wenlock Series, 93. 

 Ludlow Series, loi. Lake District, etc., 107: Basement Bed, 

 107. Stockdale Shales, 108. Coniston Grits and Flags, 1 10. 

 Bannisdale Slates, HI. Kirkby Moor Flags, 112. 



Old Red Sandstone and Devonian 113 



Old Red Sandstone, 1 17. Lower Old Red Sandstone, 119. Devonian, 



122. Tables showing the divisions of the Devonian Rocks, 122, 



123, 131, 138. Upper Old Red Sandstone, 142. 



