CONTENTS
Charles Sherwood Robinson
Page
Abstract
1
Introduction
1
Geology
3
Devils Tower
3
Sedimentary rocks
6
Spearfish formation
6
Gypsum Spring formation
7
Sundance formation
7
Stockade Beaver shale member
8
Hulett sandstone member
8
Lak member
9
Redwater shale member
9
Stream terrace deposits and alluvium
10
Talus and landslide material
10
Structure
11
Geologic history
11
Origin of Devils Tower
12
Selected bibliography
13
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