CONTENTS OF THE FIRST VOLUME. 



PART L— GENERAL INTRODUCTION. 

 CHAPTER I. 



PAGE 



Definition of Palaeontology — Palaeozoology and Paleobotany — Defi- 

 nition of the term ''fossil" — Processes of fossilisation — Defini- 

 tion of Rock — Classification of rocks, 3-10 



CHAPTER II. 



Characters of the Sedimentary rocks — Mode of formation of the 

 Sedimentary rocks — General use of the term " formation " — Chief 

 divisions of the Aqueous rocks — Mechanically-formed rocks— 

 Chemically-formed rocks — Rock-salt — Gypsum — Phosphate of 

 lime — The mode of origin of the Calcareous rocks generally — 

 Organic origin of many limestones — Chief varieties of the 

 organic limestones — Secondary crystallisation in limestones — 

 Fibro-crystalline structure in limestones — Summary of the chief 

 groups of organisms concerned in the formation of limestones — 

 Sorby's researches on aragonite and calcite — Chemical compo- 

 sition of the skeleton of calcareous organisms — Preservation of 

 calcareous organisms in limestones — Lithological characters of 

 different limestones — Magnesian limestones — Oolitic structure 

 of limestones — Superinduced crystallisation in limestones — Met- 

 amorphic limestones — Siliceous organic deposits — Beds of 

 Sponge spicules — Flint and chert — Deposits of silicates — Car- 

 bonaceous deposits, 11-35 



CHAPTER III. 



Different ages of the Aqueous rocks as determined by stratigra- 

 phical and palaeontological evidence — General chronological suc- 

 cession of the Aqueous rocks — Definition of names of rock- 

 groups — General classification of the Post-Archaean fossiliferous 



