University of Pennsylvania radiocarbon dates, [Part] 4.

Abstract

With one exception, radiocarbon dates in this list were reported previously by Rainey and Ralph (Am. Antiquity, v. 24, no. 4, p. 365-374, 1959). The radiocarbon determinations were made over a period of several years. Those processed before 1956 were dated by the solid-C method, others, by the carbon-dioxide method. The age calculations are based on the average of several samples dated archeologically and by tree-rings, corrected to zero age. The B.P. dates are calculated from A.D. 1957 (solid-C) and A.D. 1958 (carbon dioxide). The one exception, not included in the previous publication, is sample P-325 from St. Lawrence Island, Alaska (Okvik period), a recount of C-505 (Chicago II) after conversion to carbon dioxide. The 52 dated samples are from Alaska, Southampton Island (Northwest Territories), and Yukon Territory.