TABLE or CONTENTS. xi 



CHAPTER IV.— SOILS. 



Origin — dasses of Soils — Prairie Loam — Lighter Marly Clay Soils — Heavier Marly 

 Clay Soils — Red Marly Clay Soils — Limestone Loam — Silicious Sandy Soils -r- 

 Calcareous Sajidy Soils — Humus Soils — Alluvial Soils — Analyses of Soils — Mag- 

 nesian Character — Comparison of Soils and Vegetation, - 188-198 



CHAPTER v. — QUATERNAKY FORMATIONS- THE DRIFT. 



Definition — Glacial Movements — Direction of Glacial Grooves — Trains of Bowlders 

 from Archsean Outcrops — Surface Configuration — Peculiar Phenomena at Burling- 

 ton and East Troy — Fiords — Glacial Drift, Moraines, Kettle Range — "Kettles" 



— Character of Range — Width — Material — Structure — Comparative Abruptness 

 of Opposite Slopes — General Relationship — Suminit Altitudes — Kettle Range, a 

 Gigantic Moraine — Minor Moraines — Bowlder Clay or Till — Origin — Composition 



— Gravel Bowlders — Modified Drift, Champlain, Beach Formation A. — The 

 Lower Red Clay — Character — Thickness — Elevations it Attains, and their Sig- 

 nificance — Depression indicated — Beach Formation B. — Character — Thickness 



— Upper Red Clay — Character — Thickness — Beach Formations C. and D., and 

 the Modified Red Clay — Description — Relations — Origin — Altitudes of the Beach 

 Ridge — Terraces — Beach Eidge of Sand — Beach Ridge of Rock- Fragments — 

 Terraces of Rook — The Three Forms United — Secondary Beach Lines — Gen- 

 eral Movements — Encroachments of Lake Michigan — ^ Dunes — Erosion and Deposit 



— Industrial Nature of the Drift Formations — Brick — Chemical Nature of the 

 White Brick — Manufacture at Milwaukee, Racine, Ozaukee, Sheboygan Falls, 

 Manitowoc, Kewaunee, Appleton, Neenah, Menasha, Chfton, Watertown, Water- 

 loo, Jefferson, Ft. Atkinson, Edgerton, Whitewater, and elsewhere — Tiles — Pot- 

 tery — Magnetic Iron Sands — Shell Marl — Peat — Origin — Details of Borings — 

 Utilization, - 199-2^6 



Formations of Eastern Wiscoifsiir, - 247 



CHAPTER VI. — ARCH^AN FORMATIONS. 



The Mukwa Granite — The Berlin Porphyry — The Qaartz-Porphyry of Pine Bluffn 



— The Quartz-Porphyry of Marquette — The Quartzites of Poi-tland and Water- 

 loo, - - 248-256 



CHAPTER VII.— LOWER SILURIAN. 



Potsdam Sandstone — General Character— Madison Sandstone — Mendota Limestone 



— Organic Remains — Method of Deposit- Extent — Sections and Local Descrip- 

 tions— iower Magnesian Limestone — General Character — Organic Remains — 

 Area — Thickness — Local Descriptions — Economic Considerations — Si. Peters 

 Sandstone — Thickness — Structure — Transition Beds — Organic Remains — Meth- 

 od of Formation — Extent and Local Descriptions — Economic Considerations — 

 Trenton Group — Trenton Limestone — Subdivisions — Lower Buff Beds — Lower 

 Blue Beds — Upper Buff' Beds — Upper Blue Beds — Local Descriptions — Indus- 

 trial Considerations — Galena Limestone — General Characteristics — < )rganic Con- 

 tents — Thickness — Industrial Value — Distribution and Local Details — Recapitu- 

 lation— The Cincinnati Shales and Limestones- General Character — Thicloiess 



— Life — Industrial Value — Distribution amd Local Details — Table of Fossils of 

 the Trenton Period, 257-326 



