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Thirty eight deposits of Holocene peat sampled in the Vermont-New Hampshire area of the Glen Falls 1:250,000 sheet illustrate the ability of some deposits to accumulate anomalous amounts of certain elements, including Ni, Co, Cu, V, Sr, La, Nd, Eu, Th, and U. The amount of each element in a given deposit depends on the presence of available sources in the underlying bedrock, and the efficiency of groundwater transport from sources to peat-forming marsh or swamp. The presence of fracture zones and solution channels, such as in karst, facilitate transport. Uranium is the most anomalous element, and in 76 samples ranges in concentration from 1 to 467 ppm (parts per million) with a mean of 48 ppm. Deposits having the greatest anomalies are located just south of Fern Lake, Vermont, in a swamp containing an estimated 40,000 tons of commercial quality dry peat, and in a marsh east of Lake Sunapee near New London, New Hampshire, where the peat resource is also estimated at 40,000 tons. This report relates the positions in the deposits where the various amounts of uranium occur, to ancient ecological environments or ecosystems which may influence or control uranium anomalies. *Present address: New Hampshire Geological Survey, Durham, New Hampshire 03824 The uranium contents of the peat deposit near Fern Lake are similar to the lowest ore-grade portions of the Flodelle Creek, Washington, deposit the only surficial uranium mine in the United States. Like the Washington State deposit, the deposits in Vermont and New Hampshire are relatively non-radioactive because of post-glacial ages <10,000yrs., for which daughter products such as radium and thorium have not yet formed in appreciable amounts. Agricultural users of peat should be alerted to the uranium content of these samples.

Some controls on trace-element concentrations, especially uranium, in selected peat deposits in Vermont and New Hampshire