Dating direct net
As the occurrence of a natural ED-EPR signal was found to be related to the quartz grain size of the temper, a petrographic study was carried out.This first attempt at age determination of pottery by ED-EPR meant that experimental conditions and important parameters could be taken into account in developing a new dating procedure.The Pulsed method (ED-EPR) allowed this limitation to be overcome, with recording of radiation-induced defect signals, as shown by increased signal intensity after artificial irradiation of samples.
Such data can help to evaluate the presence of reservoir effects when undertaking radiocarbon dating of foodcrust samples.
ABSTRACT: Electron Paramagnetic Resonance (EPR) dating, like luminescence techniques, is based on the time-dependent accumulation of trapped charges at mineral defect centres.
However, Fe(III) ions prevent the common Continuous Wave (CW-EPR) approach for dating pottery, which always contains iron.
Both radiocarbon and luminescence dating have been the most frequently used techniques but others such as archaeomagnetism can also be used in some cases.
This paper intends to give an overview of the recent achievements on the use of absolute dating techniques for building materials.
However, in the last two decades, important advances on the use of absolute dating methods on building materials have increased the possibilities of reconstructing building chronologies, although some advances are still scarcely known among archaeologists and architects.
Recent studies performed on several kinds of mortars, fired bricks, mud-bricks, and even stone surfaces have shown that it is possible to date them.
ABSTRACT: Foodcrusts, the charred surface deposits on pottery vessel surfaces, provide a rich source of data regarding container function.
This article reviews recent applications focusing on the detection of aquatic resources (marine and freshwater) in pottery vessels using a range of analytical approaches including bulk isotope measurements of carbon and nitrogen, lipid biomarker analysis, and compound-specific carbon isotope determinations.
Pottery sherds can be dated by four methods: (i) stylistic features; (ii) luminescence analysis of minerals within the sherd; (iii) 14C assay of carbon on or within the sherd; and (iv) archaeomagnetic intensity of the sherd. The results obtained by the various methods are reviewed, and the conclusion reached that a combination of at least two of the methods, where possible, is recommended in order to enhance confidence in the validity of the outcome.
ABSTRACT: The reconstruction of the chronology of historical buildings is a tricky issue, as usually there are not historical documents that allow the assessment of construction phases, and some materials are hardly reliable for the use of dating techniques (e.g., stone).