|
The Beginning of a Valley
|
37
|
|
The Course of a Valley
|
39
|
|
Tributary Valleys
|
39
|
|
How a Valley gets a Stream
|
40
|
|
Limits of a Valley
|
43
|
|
A Cycle of Erosion
|
44
|
|
Effects of unequal Hardness
|
47
|
|
Falls and Rapids
|
48
|
|
Narrows
|
49
|
|
Erosion of folded Strata
|
50
|
|
Base-level Plains and Peneplains
|
50
|
|
Transportation and Deposition
|
55
|
|
Topographic Forms resulting from Stream Deposition
|
56
|
|
Rejuvenation of Streams
|
56
|
|
Underground Water
|
58
|
|
CHAPTER IV.
|
|
EROSION AND THE DEVELOPMENT OF STRIKING SCENIC FEATURES
|
|
Establishment of Drainage
|
61
|
|
Striking scenic Features
|
64
|
|
The Baraboo Bluffs
|
65
|
|
The Narrows in the Quartzite
|
66
|
|
Glens
|
68
|
|
Natural Bridge
|
69
|
|
The Dalles of the Wisconsin
|
69
|
|
The Mounds and Castle Rocks
|
71
|
|
CHAPTER V.
|
|
THE GLACIAL PERIOD.
|
|
The Drift
|
73
|
|
Snow Fields and ice Sheets
|
74
|
|
The North American ice Sheets
|
78
|
|
The Work of glacier Ice
|
79
|
|
Erosive Work of Ice. Effect on Topography
|
79
|
|
Deposition by the Ice. Effect on Topography
|
85
|
|
Direction of ice Movement
|
88
|
|
Effect of Topography on Movement
|
89
|
|
Glacial Deposits
|
94
|
|
The ground Moraine
|
97
|
|
Constitution
|
99
|
|
Topography
|
101
|
|
Terminal Moraines
|
102
|
|
Topography of terminal Moraines
|
103
|
|
The terminal Moraine about Devil's Lake
|
105
|
|
The Moraine on the main Quartzite Range
|
107
|
|
Constitution of the marginal Ridge
|
110
|
|
The Slope of the upper Surface of the Ice at the Margin
|
111
|
|
Stratified Drift
|
111
|
|
Its Origin
|
112
|
|
Glacial Drainage
|
113
|
|
Stages in the History of an Ice Sheet
|
114
|
|
Deposits made by extraglacial Waters during the maximum Extension of the Ice
|
115
|
|
At the Edge of the Ice, on Land
|
115
|
|
Beyond the Edge of the Ice, on Land
|
116
|
|
Deposits at and beyond the Edge of the Ice in standing Water
|
120
|
|
Deposits made by extraglacial Waters during the Retreat of the Ice
|
121
|
|
Deposits made by extraglacial Waters during the Advance of the Ice
|
123
|
|
Deposits made by subglacial Streams
|
124
|
|
Relations of stratified to unstratified Drift
|
125
|
|
Complexity of Relations
|
126
|
