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Published in Soil Sci Soc Am J 18:203-206 (1954)
© 1954 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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The Characteristics of Some Soils on Tills of Cary and Mankato Age in Michigan1

B. L. Allen and E. P. Whiteside2

ABSTRACT

Field and laboratory studies were made of the well drained soils and the associated loamy tills of the Cary and Mankato substages of the Wisconsin drift in Sanilac County, Mich.

The soils on the Cary till are deeper, more acid, and more clearly differentiated into horizons than those on the Mankato till. The mean carbonate content and depth of leaching of the Mankato till are 31.4% and 20 inches, respectively. The mean carbonate content and depth of leaching on the Cary till are 22.4% and 29 inches, respectively. The soil profile studied on the Mankato till is more permeable in all horizons than the profile on the Cary till. The C horizons — i.e., the glacial tills — are the most impermeable parts of both profiles.

Calculations using these data and assuming 11,000 years as the length of post-Mankato time indicate that the duration of the Cary-Mankato interglacial stage was 1,100 to 5,500 years. Further work is needed on this point.

NOTES

1 Michigan Journal Article No. 1585 of the Michigan Agr. Exp. Sta., East Lansing, Mich. Presented before Division V, Soil Science Society of America, Dallas, Tex., Nov. 19, 1953.

2 Former Graduate student at Michigan State College, now Instructor of Agronomy, Eastern New Mexico University, Portales, N. Mex., and Professor of Soils, Michigan State College, East Lansing, respectively.

Received for publication December 21, 1953.




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