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Zirconium Content of Coarse Silt in Loess and Till Of Wisconsin Age in Northern Illinois¹

ABSTRACT

The zirconium content of the course silt fraction of 11 calcareous Wisconsin age till samples and 13 calcareous Wisconsin age loess samples was determined by the X-ray emission spectrograph. It was found that the mean zirconium content of the loess (0.055%) was approximately twice as high as in the glacial tills (0.022%). This difference in zirconium content may be used to help distinguish loess from till where separation is difficult by field methods and also should be helpful in soil development studies.

¹ Contribution from the Department of Agronomy, University of Illinois, Urbana. Published with the approval of the Director of the Illinois Agr. Exp. Sta.

² Assistant Professor of Pedology, Associate Professor of Soil Mineralogy, and Assistant in Pedology, respectively.

Received for publication May 24, 1961. Accepted for publication December 21, 1961.