Page:A Treatise on Geology, volume 1.djvu/13

This page has been validated.

vii

CONTENTS.

	Page
Structure of the Globe─continued.
Origin of stratified and unstratified Rocks	45
Relative Periods of disturbed Stratification	49
CHAP. IV.
SERIES OF STRATIFIED ROCKS.
Sections and Maps of Strata	53
Table of British stratified Deposits	54
Varieties of Stratification	59
Divisional Structures of Rocks	62
Geographical Relations of Joints	65
Cleavage	67
CHAP. V.
ORGANIC REMAINS OF PLANTS AND ANIMALS.
Fossil Plants	69
Table of their Geological Distribution	73
Fossil Zoophyta	73
Table of certain Groups	76
Fossil Mollusca	77
Table of proportionate Number of Species at different Geological Periods	80
Table of proportionate Number of Species in the different Orders or Classes of Mollusca in different Geological Periods	81
Table of Genera containing many living Species of Gasteropoda	82
Table of Genera containing many Fossil Species of Conchifera	83
Table of Genera of Cephalopoda	83
Table of Subgenera of Ammonites	84
Articulated Animals	84
Table of Crustacea	85
Fossil Fishes	86
Agassiz's. Classification of Fishes	88
Table	90
Fossil Reptiles	91
Owen's System of Fossil Saurians	92
Fossil Birds	95
Fossil Mammalia	95
Marsupial of Stonesfield	97
Table of Mammalia	99
General Considerations	100
CHAP. VI.
HISTORICAL VIEW OF THE STRATIFIED ROCKS IN THE CRUST OF THE EARTH.
Introductory Remarks	107
Granitic Basis of the Crust of the Earth	108