CONTENTS. 
Introduction. 
The Upper Cretaceous. 
Geography. 
Topography. 
Dip. 
Divisions. 
The Dakota. 
Lower Group. 
Upper Group. 
Lignite Horizon. 
Salt Marsh Horizon. 
Gypsiferous Horizon. 
Dakota Stratigraphy. 
Paleontology. 
Dakota Water-bearing Strata. 
The Benton. 
Geography. 
Stratigraphy. 
The Lower Group. 
The Bituminous Shale Horizon. 
The Lincoln Marble Horizon. 
The Flagstone Horizon. 
The Inoceramus Horizon. 
The Fence Post Horizon. 
The Upper Group. 
The Ostrea Horizon. 
The Blue Hill Horizon. 
The Salt Creek Gravel Beds. 
The Niobrara, 
Septaria. 
Fort Hays Limestone. 
The Pteranodon. 
Section through the Cretaceous—Clifton to Colorado Wine. 
Benton Section—Beloit to Tipton. 
Fort Pierre Section—St. Francis to Arickaree River. 
Dakota Section—Breookville to Little Timber Creek. 
