CONTENTS. 



PAGE 



INTRODUCTION 1 



Shallow-water beds ; Deep-water beds ; Variations in 

 thickness ; Unconformities ; Difficulties of Geographical Re- 

 storation. 



CHAPTER I. ARCHXAN TIME . ..."... 13 

 CHAPTER II. CAMBRIAN PERIOD 16 



1. Stratigraphical Evidence. 2. Geographical Restora- 

 tion. 



CHAPTER III. ORDOVICIAN PERIOD 27 



1. Stratigraphical Evidence ; England, Scotland, Ireland. 

 2. Geographical Restoration. 



CHAPTER IV. SILURIAN PERIOD 40 



1. Stratigraphical Evidence. 2. Geographical Resto- 

 ration. 



CHAPTER V. OLD RED SANDSTONE AND DEVONIAN . . 49 



1. Stratigraphical Evidence; Classification, Lower Old 

 Red Series, Devonian System, Upper Old Red Sandstone. 

 2. Geographical Restoration. 



CHAPTER VI. CARBONIFEROUS PERIOD 69 



1. Stratigraphical Evidence; Classification, Coast-lines. 

 2. Geographical Restoration. 3. Physical changes during 

 the period. 



CHAPTER VII. DTASSIC OR PERMIAN PERIOD . . .102 



1. Stratigraphical Evidence. 2. Geographical Resto- 

 ration. 



