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The Radiocarbon Revolution Since its development by Willard Libby in the 1940s, radiocarbon (14C) dating has become one of the most essential tools in archaeology.

Radiocarbon dating was the first chronometric technique widely available to archaeologists and was especially useful because it allowed researchers to directly date the panoply of organic remains often found in archaeological sites including artifacts made from bone, shell, wood, and other carbon based materials.

Compared to conventional radiocarbon techniques such as Libby's solid carbon counting, the gas counting method popular in the mid-1950s, or liquid scintillation (LS) counting, AMS permitted the dating of much smaller sized samples with even greater precision.

Regardless of the particular 14C technique used, the value of this tool for archaeology has clearly been appreciated.

Three black fragments (a, b, c) were analysed with a scanning electron microscope energy dispersive spectrometry probe (SEM–EDS) (e, f), fast Fourier infra-red, FTIR (d) and Raman spectrometry (g, h, i).

Probably the most important factor to consider when using radiocarbon dating is if external factors, whether through artificial contamination, animal disturbance, or human negligence, contributed to any errors in the determinations.

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I have studied lacustrine tufa deposits from the Miocene deposits of the Barstow Formation, California. Schematic stratigraphic sections and U-Pb calcite ages from the Barstow Formation. Left panel: Rainbow Basin Ar-Ar ages of the Red, Rak, and Dated Tuffs (Mac Fadden et al., 1990). This study was part of an undergraduate research project conducted by Jessica Nienstedt.

I am working on samples of lacustrine calcite and root casts from archaeological sites in East Africa.

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The specific epithet persica refers to its widespread cultivation in Persia (modern-day Iran), whence it was transplanted to Europe.

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