VI 



CONTENTS. 



PAGE 



PREFACES BY THE DIRECTOR ii 



ERRATA ON THE SPECIAL LONDON MAP ... ... ... ... v 



CHAPTER I. INTRODUCTION ... ... ... ... ... ... 1 



CHAPTER II. UNDERGROUND GEOLOGY. 



Palaeozoic Rocks. Jurassic Rocks. Cretaceous Rocks ; Lower 

 Greensand and Selbornian. Table of Deep Borings. . . ... 5 



CHAPTER III. CRETACEOUS ROCKS, CHALK. 



The Zones of the Chalk and their Fossils. Conditions of 

 formation. Flint ... ... ... ... ... ... 8 



CHAPTER IV. EOCENE ROCKS. 



General Account. Thanet Beds. Woolwich and Reading 

 Beds. Blackheath Beds. London Clay. Claygate Beds. 

 Bagshot Series ... ... ... ... ... ... ... 16 



CHAPTER V. STRUCTURAL GEOLOGY 36 



CHAPTER VI. PLIOCENE (and later). 



The Older Gravels. Clay-with-flints and Plateau Brickearth. . . 39 



CHAPTER VII. PLEISTOCENE. GLACIAL DEPOSITS. 



General Account. Boulder Clay. Glacial Gravels ... ... 44 



CHAPTER VIII. PLEISTOCENE (continued). RIVER DEPOSITS. 



General Account. Fossils. Stratigraphy; Nomenclature, 

 Upper Terrace, Middle Terrace, Low Terrace, Coombe 

 deposits and Trail, Buried Channel. River Development and 

 Topographical Evolution. Flint Implements ... ... 49 



CHAPTER IX. HOLOCENE OR RECENT. 



Alluvium. The Thames and its Tributaries. Springs ... ... 70 



CHAPTER X. ECONOMIC GEOLOGY. 



Water Supply. Chalk and Flint, Whiting, Lime and Cement. 

 Brickearth and Clay. Sand. Gravel. Historical. Building 

 Stones 80 



INDEX ... ... ... ... 91 



