ECONOMIC EESOUKCES. 



523 



The mapping by the Bureau of Soils has been done in scattered areas of small extent. The 

 following is the complete list of the maps published to October 31, 1914: 



Soil maps of Indiana and Michigan. 



Allen County. 

 Boone County. 

 Boonville area. 

 Greene County. 

 Hamilton County. 

 Madison County. 

 Marion County. 



Marshall County. 

 Montgomery County. 

 Newton County. 

 Posey County. 

 Scott County. 

 Tippecanoe County. 

 Tipton County. 



Allegan County. 

 Alma area. 

 Cass County. 

 Genesee County. 

 Munising area. 

 Owosso area. 

 Oxford area. 



Michigan. 



Pontiac area. 

 Saginaw area. 

 Wexford County. 



The mapping has been so distributed in Indiana and Michigan as to embrace nearly every 

 class of glacial, fluvial, and lacustral formation. Thus in Michigan the Oxford and Pontiac areas 

 represent the complex features of an interlobate district with associated gravelly and sandy 

 outwash. The Saginaw area is wholly in a glacial lake bottom where characteristic lake clays 

 and lake sands are found. The Alma and Pontiac areas are partly on lake bottom, partly on 

 moraines and their associated till plains, and partly on fluvioglacial drainage lines. The 

 Allegan area illustrates the combination of sandy plains and gravelly or loose-textured moraines 

 found on the east side of the Lake Michigan basin. In Indiana, Allen County embi aces a lake 

 plain as well as moraines and till plains. Madison, Marion, Newton, and Tippecanoe counties are 

 largely a till plain, though Newton County embraces also an extensive sand plain bordering 

 the Kankakee. Greene, Posey, and Scott counties embrace loess-covered glacial formations and 

 also unglaciated loess-covered districts (see PI. VI), and the Boonville area lies entirely in an 

 unaflaciated loess-covered district. 



