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Dating of the basal aurignacian sandwich at Abric Romaní (Catalunya, Spain) by radiocarbon and Uranium-Series
Abric Romani, a rock shelter located near Barcelona, Spain, contains a charcoal-bearing basal Aurignacian occupation level sandwiched between beds of moss-generated carbonate. The Aurignacian culture… Expand
Isotope-ratio and background corrections for accelerator mass spectrometry radiocarbon measurements
We present here the method we use to convert to radiocarbon ages (14C/13C) ratios measured in the Arizona Accelerator Mass Spectrometer facility. We describe the procedures we use to convert sample… Expand
Preparation of small samples for 14C accelerator targets by catalytic reduction of CO.
Graphite in various forms has become the standard target for accelerator 14 C dating. Graphite has been made by catalytic graphitization of charcoals (Lowe, 1984). Thin films of graphite have also… Expand
Accelerator Radiocarbon Dating at the Molecular-Level
Molecular level 14C dating is the isolation of specific classes of molecules for their 14C dating by accelerator mass spectrometry (AMS). Complex matrices such as fossil bone are difficult to date… Expand
Problems and possible solutions concerning radiocarbon dating of surface marine sediments
Abstract Radiocarbon accelerator mass spectrometric (AMS) dates on the acid-insoluble fraction from 38 core tops from the western Ross Sea, Antarctica, are used to address these questions: (1) What… Expand
Converting AMS Data to Radiocarbon Values: Considerations and Conventions
We summarize the basic operation of accelerator mass spectrometry (AMS) systems used to measure radiocarbon and discuss the calculations used to convert AMS output to 14C data.
Analysis of Hillslope Erosion Rates Using Dated Colluvial Deposits
Hollows are sites of long-term deposition of colluvium and contain a valuable record of the timing and rates of hillslope erosion. A model is presented that uses measured depositional rates of… Expand
First Direct AMS Dates on Early Maize From Tehuacan, Mexico
The Tehuacan region in Central Mexico is thought to be the locale of origin of Zea mays, or maize, a cultivated plant pivotal in the development of agriculture in the Americas (MacNeish, 1981, 1985).… Expand
Study of bone radiocarbon dating accuracy at the University of Arizona NSF accelerator facility for radioisotope analysis.
Bone would seem to be an ideal material for 14 C dating because this calcified tissue contains 20 weight per cent protein. Fossil bone, however, can lose most of its original organic matter and… Expand