Radiocarbon dating journals
Consequently, it is necessary to identify alternative materials that might enable reliable and effective dating. When the plant dies and decays, this carbon fraction, encapsulated by silica, can survive for long periods due to the phytolith’s high resistance to decomposition.
Phytolith-occluded carbon (Phyt OC) has been demonstrated to be an important form of carbon sequestration.
The estimated ages of the phytoliths and other materials were generally consistent, except for one outlier.
We attribute this inconsistency to the post-depositional processes of phytoliths in soil, rather than to the uptake of old carbon from the soil.
A new, improved method was developed to extract phytoliths from soils.
Scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM-EDS) analysis was performed to check the purity of concentrated phytoliths.
The Xinglefang site is located in Shanxi province, western China (Fig. Wuluoxipo is attributed to the Peiligang culture (7000–5000 BCE).
Yingyang and Yuancun are attributed to the Yangshao culture (5000–3000 BCE).
The phytolith and most of the other materials were dated by Beta Analytic Lab, except for two plant samples from the Tianluoshan site, which were sent to the Peking University accelerator mass spectrometry (AMS) laboratory.
Fourteen samples were collected from six archaeological sites.