Page:A Treatise on Geology, volume 1.djvu/12

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CONTENTS.





 
CHAPTER I.
 
INTRODUCTORY VIEWS.
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Objects of Geological Science 1
Means of Geological Investigation 6
Scale of Geological Time 8
Series of Stratified Rocks 9
Lapse of Time inferred from the Nature of the Series of Rocks 10
Antiquity of the Surface 11
Nature of the Scale of Time 12
Terms of the Scale of Geological Time 12
Series of Terms on the Scale of Geological Time 14
Interruptions in the Series of Time 16
Length of the Scale of Time 17
Means of Investigation of Facts 18
Means of Interpretation of Phenomena 20
 
CHAP. II.
 
GENERAL REASONINGS CONCERNING THE SUBSTANCE OF THE GLOBE.
 
Chemical Data as to the exterior Parts of the Earth 23
Proportions per cent, of Oxygen in Earths, Minerals, and Rocks 24
Physical Data as to the interior Constitution of the Earth 26
Mass of the Globe, whence derived 28
 
CHAP. III.
 
GENERAL TRUTHS CONCERNING THE STRUCTURE OF THE EXTERNAL PARTS OF THE GLOBE.
 
Structure of the external Parts of the Globe 33
Forms of Rock Masses 35
Position of Rocks. Declination of Strata 36
Local Declinations and unusual Positions of Strata 39
Faults 40
Extent and Frequency of Faults 42
Relation of Faults, Mineral Veins, Dikes, &c. to the great Lines of disturbed Rocks 44