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Mica Weathering Sequence in the Highfield and Chester Soil Profiles¹

ABSTRACT

The paper consists of the description of a procedure for determining the nature of the micas in soils and the application of this procedure to the study of the weathering characteristics of the micas in the Highfield soil profile from Pennsylvania and the Chester soil profile from Virginia. The results of this study indicate a definite type of weathering sequence of the micas, which consists of mica — mica intermediate, to hydrated mica to chlorite — kaolin.

¹ Contribution from the Department of Agronomy, The Pennsylvania State College, State College, Pa. Authorized for publication on Nov. 14, 1952, as paper Number 1769 in the Journal Series of the Pennsylvania Agricultural Experiment Station. Presented before Division II, Soil Science Society of America, Cincinnati, Ohio, Nov. 20, 1952.

² Professor of Soil Technology; Soil Scientist, United States Geological Survey, Fort Collins, Colo.; Assistant Professor of Agronomy, Agricultural and Mechanical College of Texas.

Received for publication January 8, 1953.