Radiocarbon dating pollen dating an international woman
The idea of scientifically dating the shroud had first been proposed in the 1960s, but permission had been refused because the procedure at the time would have required the destruction of too much fabric (almost 0.05 sq m ≅ 0.538 sq ft). P.), which involved about 30 scientists of various religious faiths, including non-Christians. Testore performed the weighting operations, while Riggi made the actual cut.
The development in the 1970s of new techniques for radio-carbon dating, which required much lower quantities of source material, prompted the Catholic Church to found the Shroud of Turin Research Project (S. Also present were Cardinal Ballestrero, four priests, archdiocese spokesperson Luigi Gonella, photographers, a camera operator, Michael Tite of the British Museum and the labs' representatives.
In lake sediments where terrestrial macrofossils are rare or absent, AMS radiocarbon dating of pollen concentrates may represent an important alternative solution for developing a robust and high resolution chronology suitable for Bayesian modelling of age-depth relationships.
Here we report an application of the heavy liquid density separation approach (Vandergoes and Prior, Radiocarbon 9–492, 2003) to Holocene lake sediments from karstic Lake Sidi Ali, Morocco.
In common with many karstic lakes, a significant lake 14C reservoir effect of 450–900 yr is apparent, evidenced by paired dates on terrestrial macrofossils and either aquatic (ostracod) or bulk sediment samples.
Support also is provided to other USGS mission areas as resources permit.
TY - JOURT1 - Radiocarbon ams dating of pollen concentrated from eolian sediments T2 - Radiocarbon AU - Zhou, Weijian AU - Donahue, Douglas AU - Jull, A.
J TPY - 1997Y1 - 1997N2 - Dating pollen concentrated from eolian sediments provides a new way to establish a chronological framework on the Loess Plateau of China.
Concentrates were prepared using a series of sodium polytungstate (SPT) solutions of progressively decreasing density (1.9–1.15 g/cm3) accompanied by microscopic analysis of the resulting residues to allow quantification of the terrestrial pollen content.
The best fractions (typically precipitating at 1.4–1.2 g/cm3) yielded dateable samples of 0.5–5 mg (from sediment samples of ∼15 g), with C content typically ∼50% by weight.