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Soil—Landscape Relationships in the Piedmont of Maryland¹

ABSTRACT

A study was conducted to investigate and model the soil-landscape relationships in the Piedmont of Maryland. The soil series of particular interest were the Chester, Glenelg, and Elioak series of Typic Hapludults. Results indicate that Elioak soil is a relict paleosol. A stone line separating strongly weathered Elioak soil material from silty overburden was revealed in several excavations. Particle-size analyses and elemental analyses of silt fractions confirmed these discontinuities. Comparisons with known and radiocarbon-dated loess deposits on the eastern shore of Maryland indicate that the silty overburden on the Piedmont is loess which was deposited after 10,520 ± 240 years B. P. Where the loess is thick, as on gentle slopes, Chester soils are mapped. Where the relict paleosol has been essentially eroded away, as on steeper slopes, Glenelg soils are mapped.

¹ Scientific Article no. A-3035 and Contribution no. 6098 of the Maryland Agricultural Experiment Station, Dep. of Agronomy, College Park, MD 20742.

Portions of this work initially presented before Division S-5 Soil Science Society of America, at Detroit, Mich., December 1980. The work reported here is part of a Ph.D. dissertation by the Senior Author: Geomorphic and Pedologic Relationships of Elioak and Associated Soils in the Piedmont of Maryland.

² Formerly Graduate Research Assistant and Professor of Soil Science, respectively, Dep. of Agronomy, Univ. of Maryland. Now Assistant Professor of Pedology, Dep. of Agronomy, University of Illinois, Urbana, IL 61801, and Chairman, Dep. of Soil Science, North Dakota State Univ., respectively.

Received for publication August 24, 1981. Accepted for publication December 14, 1981.