xii Contents 



CHAPTER PAGES 



XII. GEOLOGY - 308-319 



Great Britain, a geological microcosm William Smith, 

 rock strata Beds of rocks characterized by fossils 

 Chronological sequence Hutton and the Huttonian 

 theory Lyell and Uniformitarianism Allport, D. 

 Forbes Sorby, crystal structure Influence of local 

 surroundings The district of St. David's, oldest rocks 

 in Great Britain Aymestry limestone The Silurian 

 system Sedgwick, Cambrian rocks Miller, old red 

 sandstone Delabeche, importance of mapping The 

 Government geological survey Phillips New red sand- 

 stone Fitton and Mantell Prestwich, E. Forbes 

 Palseontological work by Davidson and others James 

 Geikie Archibald Geikie Buckland, diluvial deposits 

 Economic geology. 



INDEX 321 



