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This article in SSSAJ

  1. Vol. 18 No. 2, p. 203-206
     
    Received: Dec 21, 1953
    Published: Apr, 1954


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doi:10.2136/sssaj1954.03615995001800020023x

The Characteristics of Some Soils on Tills of Cary and Mankato Age in Michigan1

  1. B. L. Allen and
  2. E. P. Whiteside2

Abstract

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.

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