THE LAURENTIAN, HURONIAN, CAMBRIAN, AND SILURIAN LIFE-

PERIODS

CHAPTER IX.

THE DEVONIAN, CARBONIFEROUS, AND PERMIAN LIFE-PERIODS

PAGE

137

CHAPTER X.

THE TRIASSIC, JURASSIC, AND CRETACEOUS LIFE-PERIODS

175

LIST OF ILLUSTRATIONS.

FIG.

Pterodactylus longirostris

...

1. Diagram of positions of rocks affected by subterranean action

2. Strata inclined at various angles

3. Example of subsidence ...

4. Fault, Dyke, and Lode

5. Disruption of rock masses

6. Section of Crinoidal limestone

PAGE

Frontispiece