منابع مشابه
Radiocarbon dates on bones of extinct birds from Hawaii.
Bones from a stratified sedimentary deposit in the Puu Naio Cave site on Maui, Hawaiian Islands, reveal the late Holocene extinction of 19 species of birds. The age of the sediment and associated fauna was determined by direct radiocarbon dating (tandem particle accelerator-mass spectrometer; TAMS) of amino acids extracted from bones weighing as little as 450 mg. The 14C dates indicate that sed...
متن کاملSome Recent Radiocarbon Dates from Southern Africa Author(s):
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متن کاملRadiocarbon Dates from Iron Age Gordion Are Confounded
K. DeVries et al. recently presented 14C dates from Iron Age Gordion.1 They claimed that those dates require a destruction date for the site during 827–803 BC (95%-confidence range), which is a century or more earlier than the dates previously proposed. Herein, their claim is examined. (DeVries et al. also claimed artefactual support for their earlier date. O. Muscarella, however, has argued th...
متن کاملRadiocarbon Dates from a Holocene Deposit in Southwestern Australia
A radiocarbon chronology has been developed using shell, bulk peat, and paired charcoal and pollen preparations from a peat and clay sequence in southwestern Australia. The results indicate the sequence is of Holocene age, and the mid-Holocene was a period of rapid sediment deposition. The earliest record is based on Bothriembyron sp. snail shell and there is a strong indication that the deposi...
متن کاملIs Comparability of 14c Dates an Issue?: a Status Report on the Fourth International Radiocarbon Intercomparison
For more than 15 years, the radiocarbon community has participated in a series of laboratory intercomparisons in response to the issue of comparability of measurements as perceived within the wider user communities (Scott et al. 1990; Rozanski et al. 1992; Gulliksen and Scott 1995; Scott et al. 1997). In this report, we provide an update on the current 14C laboratory intercomparison and reflect...
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ژورنال
عنوان ژورنال: Radiocarbon
سال: 1963
ISSN: 0033-8222,1945-5755
DOI: 10.1017/s0033822200036742