xii GEOLOGICAL SUEVEY OP WISCONSIN. 



CHAPTER VIII— UPPER SILURIAN. 



Clinton Iron Orb Deposit — Age Emd Stratigraphical Relations — Formation at 

 Iron Ridge — Analyses — Product — Furnaces — Formation at Hartford — In Stock- 

 bridge — Near De Pere — General Conclusions — Niagara Limestone — Subdivis- 

 ions- Jlfa«/i'i7Ze i?e(is — 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 Waukesha, 

 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 the Waukesha, Racine, and Guelph Beds — Lime — Analyses — 

 Building Stone — Flux — Table of Fossils of the Niagara Group — Lower Helder- 

 herg Limestone — Character — Analyses — Extent — Fossils — -Formation in Fre- 

 donia — Fossils — • Analyses — Conclusions — Economic Considerations, 327-394 



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, - 396-405 



PAET III. 

 GEOLOGY OP CENTRAL WISCONSIN. 



BY ROLAND D. IRVING. 



Inteoddction — Extent of District — Previous Investigations — Arrangement of Re- 

 port — Acknowledgments 408-412 



CHAPTER I. -SURFACE FEATURES OF CENTRAL WISCONSIN. 



EivEK 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. — Swr/ace i?eZie/s — Watersheds — 

 Baraboo Bluffs — Isolated Peaks and Ridges —Altitudes, Madison to Ehroy — Ekoy 

 to MerriUon — Waterloo to Madison — Edgerton to Black Eariih— Camp Douglas 

 t» Randolph— Tomah to Wausau — Amherst to MerriUon — Portage to Stevens 

 Point— Stevens Point to Nori;h Line of Township 29 — Barometrical Altitudes 

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

 - Praines - Mai-shes 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. 



LaurentionSystem — Huronian System- Silurian Formations — Glacial Drift — Table 

 of Formations - . . ,-„,„„ 



4o7-460 



