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Publication Date

1983

Keywords

Drift; Glaciology; Geology, Structural--Minnesota; Soils--Analysis

Abstract

During the course of the Kandiyohi Co., Minnesota, soil survey, three different glacial tills were recognized and separated from what was formerly thought to be one homogeneous glacial till. Tile first glacial till is from the Des Moines Lobe ice advance. It has a fine-loamy particle size, friable consistency, and appreciable amounts of Cretaceous shale fragments. The oven-dry bulk density ranges from 1.3 to 1.5 glee. The second glacial till is from the Wadena Lobe ice advance. It has a coarse-loamy particle size, friable consistency, oven-dry bulk density of 1.5 to 1.7 glee, and small amounts of Cretaceous shale fragments. The third glacial till is thought to be pre-Wisconsin. Evidence suggests this till was buried and later thrust to the surface during the advance of the Wisconsin Age ice lobes. This "older" till, tentatively named " Kandiyohi ", has a fine particle size, firm or very firm consistency, and appreciable amounts of fine, rounded shale fragments. The oven-dry bulk density ranges from 1.7 to 2.0 glee. The inherent properties of the soils formed in each glacial till affect use and management. Therefore, a different catena of soils is mapped on each of the three glacial tills.

First Page

7

Last Page

9

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