The Geography of the Region about Devil's Lake and the Dalles of the Wisconsin. Wallace Walter Atwood
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Wallace Walter Atwood, Rollin D. Salisbury
The Geography of the Region about Devil's Lake and the Dalles of the Wisconsin
With Some Notes on Its Surface Geology
Published by Good Press, 2019
EAN 4064066172121
Table of Contents
GEOGRAPHY AND SURFACE GEOLOGY OF THE DEVIL'S LAKE REGION.
| PART I. THE TOPOGRAPHY WITH SOME NOTES ON THE SURFACE GEOLOGY. | |
| CHAPTER I. | |
| PAGE | |
| GENERAL GEOGRAPHIC FEATURES | 3 |
| I. The Plain Surrounding the Quartzite Ridges. | |
| Topography | 6 |
| Structure | 8 |
| Origin of the Sandstone and Limestone | 9 |
| Origin of the Topography | 12 |
| II. The Quartzite Ridges | 13 |
| Topography | 13 |
| The Structure and Constitution of the Ridges | 14 |
| III. Relations of the Sandstone of the Plain to the Quartzite of the Ridges | 19 |
| 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 | 23 |
| From loose Sand to Quartzite | 23 |
| Uplift and Deformation. Dynamic Metamorphism | 24 |
| Erosion of the Quartzite | 25 |
| Thickness of the Quartzite | 26 |
| II. The History of the Paleozoic Strata | 27 |
| The Subsidence | 27 |
| The Potsdam Sandstone (and Conglomerate) | 27 |
| The Lower Magnesian Limestone | 31 |
| The St. Peters Sandstone | 32 |
| Younger Beds | 33 |
| Climatic Conditions | 34 |
| Time involved | 34 |
| The Uplift | 34 |
| CHAPTER III. | |
| GENERAL OUTLINE OF RAIN AND RIVER EROSION | |
| Elements of Erosion | 36 |
| Weathering | 36 |
| Corrasion | 36 |
| Erosion without Valleys |
37
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