* Wilcox, W. D., Washington, D.C., [20].

* Wilson, Dr. A. W. G., McGill University, Canada, [68].

* Wilson, G. W., & Co., Aberdeen, Scotland, [82], [213].

* Worsley-Benison, F. H., Cheapstow, England, [170].

* Dealer in photographs or lantern slides.

CONTENTS

Page
[Introduction.—The Scope And Aim Of Geology]1
PART I
EXTERNAL GEOLOGICAL AGENCIES
Chapter
I. [The Work Of The Weather]5
II. [The Work Of Ground Water]39
III. [Rivers And Valleys]54
IV. [River Deposits]93
V. [The Work Of Glaciers]113
VI. [The Work Of The Wind]144
VII. [The Sea And Its Shores]155
VIII. [Offshore And Deep-Sea Deposits]174
PART II
INTERNAL GEOLOGICAL AGENCIES
IX. [Movements Of The Earth’s Crust]195
X. [Earthquakes]233
XI. [Volcanoes]238
XII. [Underground Structures Of Igneous Origin]265
XIII. [Metamorphism And Mineral Veins]281

PART III

HISTORICAL GEOLOGY
XIV. [The Geological Record]291
XV. [The Pre-Cambrian Systems]304
XVI. [The Cambrian]315
XVII. [The Ordovician And Silurian]327
XVIII. [The Devonian]341
XIX. [The Carboniferous]350
XX. [The Mesozoic]368
XXI. [The Tertiary]394
XXII. [The Quaternary]416
[INDEX]451

THE ELEMENTS OF GEOLOGY