Abstract
The depositional and early diagenetic environments in southern Chesapeake Bay are interpreted in terms of horizontal and vertical variations of percent content by weight of sediment of (1) organic and inorganic arbon, (2) total phosphorus, (3) total iron, (4) calcium and magnesium, (5) sodium and potassium, and (6) Kjeldahl nitrogen. Sediment reworking activities by benthic invertebrates are shown by non-laminated structure of the sediment and homogeneous vertical distribution of the major cations. Organic carbon and total iron contents are highest in the fine, deepest water sediments. The existence of organoiron complexes in the sediment is supported by a positive correlation between organic carbon and total iron. An aerobic hydrosol condition of the surface sediments is indicated by high phosphorus contents. Organic carbon: Kjeldahl nitrogen ratios suggest that the organic matter of subsurface sediments is largely refractory.
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