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Index
CONTENTS.
LIST OF ILLUSTRATIONS.
PART I.
THE TOPOGRAPHY.
GEOGRAPHY AND SURFACE GEOLOGY OF THE DEVIL'S LAKE REGION.
CHAPTER I.
GENERAL GEOGRAPHIC FEATURES.
I. THE PLAIN SURROUNDING THE QUARTZITE RIDGES.
II. THE QUARTZITE RIDGES.
III. RELATIONS OF THE SANDSTONE OF THE PLAIN TO THE QUARTZITE OF THE RIDGES.
PART II.
HISTORY OF THE TOPOGRAPHY.
CHAPTER II.
OUTLINE OF THE HISTORY OF THE ROCK FORMATIONS WHICH SHOW THEMSELVES AT THE SURFACE.
I. THE PRE-CAMBRIAN HISTORY OF THE QUARTZITE.
II. THE HISTORY OF THE PALEOZOIC STRATA.
CHAPTER III.
GENERAL OUTLINE OF RAIN AND RIVER EROSION.
CHARACTERISTICS OF VALLEYS AT VARIOUS STAGES OF DEVELOPMENT.
Transportation and Deposition.
Rejuvenation of Streams.
Underground Water.
CHAPTER IV.
EROSION AND THE DEVELOPMENT OF STRIKING SCENIC FEATURES.
Striking Scenic Features.
CHAPTER V.
THE GLACIAL PERIOD.
The Work of Glacier Ice.
DIRECTION OF ICE MOVEMENT.
Limit of the Ice.
Glacial Deposits.
The Ground Moraine.
Terminal Moraines.
Stratified Drift.
Deposits Made by Extraglacial Waters During the Maximum Extension of the Ice.
Deposits Made by Extraglacial Waters During the Retreat of the Ice.
Deposits Made by Extraglacial Waters During the Advance of the Ice.
Deposits Made by Subglacial Streams.
RELATIONS OF STRATIFIED TO UNSTRATIFIED DRIFT.
CLASSIFICATION OF STRATIFIED DRIFT ON THE BASIS OF POSITION.
CHANGES IN DRAINAGE EFFECTED BY THE ICE.
While the Ice Was on.
After the Ice Had Disappeared.
Changes in Streams.
The Driftless Area.
Contrast Between Glaciated and Unglaciated Areas.
POSTGLACIAL CHANGES.
Footnotes
INDEX.
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