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Soil-Landscape Relationships of the Tidal Marshes of Maryland¹

ABSTRACT

A study was conducted to investigate and model the soil-landscape relationships represented in the 87,000 ha of tidal marsh in Maryland. Models are presented for three physiographic marsh landscapes: Coastal, Estuarine, and Submerged Upland. Coastal marshes, about 8% of the total marsh area, have formed in the lagoons behind coastal barrier islands. The associated soils are primarily Sulfaquents and Sulfihemists. Estuarine marshes, 38% of the total, have formed from recent accumulation of sediments in stream channels and estuarine meanders. The majority of the associated soils are Sulfaquents, Sulfihemists, and Hydraquents. Submerged Upland marshes are the most extensive, covering an estimated 54% of the total. These marshes have formed as a result of the inundation of low-lying uplands by rising sea level. It appears that the soils were formerly Aquults and, because of submergence, they have become Histic Halaqualfs (proposed) and Sulfihemists.

¹ Scientific Article no. A2479 and Contribution no. 5509 of the Maryland Agric. Exp. Stn., Dept. of Agronomy, College Park, MD 20742. Initially presented before Div. S-5, Soil Science Society of America at Houston, Texas, Nov. 1976. The work reported here is part of a M.S. thesis by the senior author.

² Graduate Research Assistant and Professor of Soil Science, respectively.

Received for publication July 18, 1978. Accepted for publication December 14, 1978.

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