Abstract
Mean rates of vertical accretion of from 0.47 to 0.63 cm yr−1 have been determined for the past century from two widely separated sites at Flax Pond, a Spartina alterniflora marsh on the north shore of Long Island. Sediments were dated from 210Pb activity. The rates are equivalent to deposition of 325 to 436 g of dry organic matter m−2 yr−1 or about 146 to 196 g of carbon m−2 yr−1 Although the two sites differed in salt peat thickness, the basal layer of the peat was deposited about 100 years ago at both.
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