CAHTOM.l 



NORTH AMliElCAN GEOLOGY. 



885 



Silurian — C ontinueil . 

 West op the Appalachians to the 

 Mississippi River, and Minne- 

 sota — C ontinued. 



1870. Progress of survey of Ohio in 



1869, Newberry. 



Grundy, Will, Kankakee, Iro- 

 quois, Vermilion, Champaign, 

 Edgar, and Ford counties, 

 111., Bradley, F. H. 



Calhoun, Pike, Adams, Brown, 

 Schuyler, and Fulton coun- 

 ties, 111., Worthen. 



Oil bearing limestones of Chi- 

 cago, Hunt, T. S. 



Dekalb, Kane, Logan, andother 

 counties. 111., Bannister. 



1871. Geology of Highland County, 



Ohio, Orton, E. 

 Derivation of copper and asso- 

 ciates on Lake Superior, 



Pumpelly. 

 Oil wells of Terre Haute, Ind., 



Hunt, T. S. 

 Geology of Montgomery Coun- 

 ty, Ohio, Orton E. 

 Notizen aus Minnesota, Kloos. 

 General geology of Michigan, 



Winchell, A. 

 Agricultural survey of Ohio, 



Klippart. 

 Chemical report of survey of 



Ohio, Wormley. 

 Second report on Indiana. 



Cox, E. T. 

 Report of survey of Ohio for 



1869, Newberry. 

 Geology of Williams, Fulton, 



and Lucas counties, Ohio, 



Gilbert, G. K. 

 Relative age of Niagara and 



Lower Helderberg groups, 



Worthen. 

 Glacial features of Green Bay, 



Lake Michigan, Winchell, N. 



H. 



1872. Region north of Lake Superior, 



Bell, R. 



Age of copper rocks of Lake 

 Superior, Brooks and Pum- 

 pelly. 



Oil-bearing limestone of Chi- 

 cago, Hunt, T. S. 



Age of quartzites, etc., of Sauk 

 County, Wis., Irying, R. D. 



Silurian — Continued. 

 West of the Appalachians to the 

 Mississippi River, and Minne- 

 sota — Continued. 



1872. Results in lead region in Wis- 



consin, Murrish. 

 Geology of Dearborn, Ohio, and 



Switzerland counties, Ind., 



Warden, R. B. 

 Reconnaissance from Jasper to 



Howard counties, Ind., 



Collett. 

 Survey of vicinity of Belle- 



plaine, Winchell, A. 

 Cretaceous basin in Sauk Val- 

 ley, Minn., Kloos. 

 Relation of Middle and Upper 



Silurian in United States, 



Hall, J. 



1873. Geologic map of United States, 



Hitchcock, C. H. ; Hitclicock 

 and Blake. 



System of physical features of 

 Michigan, Winchell, A. 



Report of survey of Ohio, 

 Newberry. 



Reports on Sandusky, Seneca, 

 Wyandot, and Marion coun- 

 ties, Ohio, Winchell, N. H. 



Report of third district of Ohio, 

 Orton, E. 



Paleozoic rocks, upper Michi- 

 gan, Rominger. 



Peoria, McDonough, Monroe, 

 Macoupin, and Sangamon 

 counties. 111., Worthen. 



Surface geology of Maumee 

 Valley and geology of coun- 

 ties, Ohio, Gilbert, G. K. 



Rock Island County, 111., Wor- 

 then and Shaw. 



Northwest counties, Illinois, 

 Shaw. 



Chart of nomenclature for Min- 

 nesota, Winchell, N. H. 



Surface geology of northwest- 

 ern Ohio, Winchell, N. H. 



General sketch of geology of 

 Minnesota, Winchell, N. H. 



1874. Erie and Lorain counties, Ohio, 



Newberry. 

 Hamilton in Ohio, Winchell, 



N. H. 

 Land plants of Lower Silurian, 



Lesquereux. 



