xii GEOLOGICAL SURVEY OF WISCONSIN. 



CHAPTER VIII UPPER SILURIAN. 



CLINTON IRON ORE DEPOSIT Age and Stratigraphical Relations Formation at 

 Iron Ridge Analyses Product Furnaces Formation at Hartford In Stock- 

 bridge Near De Pere General Conclusions Niagara Limestone Subdivis- 

 ions Mayville Beds Character Analyses Life Table of Fossils Econ- 

 omic Value Distribution and Local Descriptions Byron Beds Character 

 Analyses Fossils Thickness Distribution Economic Considerations Trans- 

 ition Beds Lower Coral Beds Nature Organic Remains Table of Fossils 

 Upper Coral Beds Nature Organic Remains Table of Fossils Distribu- 

 tion Local Details Waukesha Beds Character Development at Waukosha, 

 at Pewaukee, in Genesee, elsewhere Racine Beds Extent and Relations 

 Local Details Summation Conclusions Coral Reefs Organic Remains 

 Table of Fossils Guelph Beds Nature Local Details Table of Fossils In- 

 dustrial Value of tfie Waukesha, Racine, and Guelph Beds Lime Analyses 

 Building Stone Flux Table of Fossils of the Niagara Group Lower HeJder- 

 berg Limestone Character Analyses Extent Fossils Formation in Fre- 

 donia Fossils Analyses Conclusions Economic Considerations, - 327-39-i 



CHAPTER IX DEVONIAN. 



HAMILTON CEMENT ROCK Nature Composition Analyses Organic Remains 

 Description of New Species of Fish Age of Formation Local Descriptions 

 Economic Considerations Investigations on the Hydraulic Properties of the For- 

 mation, -. 395-405 



PART III. 

 GEOLOGY OF CENTRAL WISCONSIN. 



BY ROLAND D. IRVING. 



INTRODUCTION Extent of District Previous Investigations Arrangement of Re- 

 port Acknowledgments 408-412 



CHAPTER I. SURFACE FEATURES OF CENTRAL WISCONSIN. 



RIVER SYSTEMS AND GENERAL SURFACE SLOPES The Wisconsin River Table of 

 Altitudes of Water Surface of Wisconsin River The Black River The Rock 

 River The Fox River Fall of Fox River. Surface Reliefs Watersheds 

 Baraboo Bluffs Isolated Peaks and Ridges Altitudes, Madison to Elroy Elroy 

 to Merrillon Waterloo to Madison Edgerton to Black Earth Camp Douglas 

 to Randolph Tomah to Wausau Amlierst to Merrillon Portage to Stevens 

 Point Stevens Point to North Line of Township 29 BAROMETRICAL ALTITUDES 



Relations of the Topography to the Geology of the region Vegetation and Soils 



Praines Marshes and Timber Land Topographical Subdivisions Resume. 

 Region of Crystalline Rocks Central Sandstone Region Limestone District, 



413-456 



CHAPTER II. GENERAL GEOLOGICAL STRUCTURE OF CENTRAL 



WISCONSIN. 



Laurention System Huronian System Silurian Formations Glacial Drift Table 

 of Formations 457-460 



