TABLE OF CONTEXTS. xi 



CHAPTER IV. SOILS. 



Origin Classes of Soils Prairie Loam Lighter Marly Clay Soils Heavier Marly 

 Clay Soils Red Marly Clay Soils Limestone Loam Silicious Sandy Soils 

 Calcareous Sandy Soils Humus Soils Alluvial Soils Analyses of Soils Mag- 

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



CHAPTER V. QUATERNARY 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 Summit 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 Ridge of Sand Beach Ridge of Rock- Fragments 

 Terraces of Rock The Three Forms United Secondary Beach Lanes 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, Clifton, Watertown, Water- 

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

 tery Magnetic Iron Sands Shell Marl Peat Origin Details of Borings 

 Utilization, - 199-246 



FORMATIONS OP EASTERN WISCONSIN, - - ' 247 



CHAPTER VI. ARCHAEAN FORMATIONS. 



The Mukwa Granite The Berlin Porphyry The Quartz-Porphyry of Pine Bluffh 



The Quartz-Porphyry of Marquette The Quartzites of Portland 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 Lower Maanesian Limestone General Character Organic Remains 



. Area Thickness Local Descriptions Economic Considerations St. 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 Thickness 



Life Industrial Value Distribution and Local Details Table of Fossils of 

 the Trenton Period, ....... 257-326 



