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A Large Drop in Atmospheric 14C/12C and Reduced Melting in the Younger Dryas, Documented with 230Th Ages of Corals
Paired carbon-14 (14C) and thorium-230(230Th) ages were determined on fossil corals from the Huon Peninsula, Papua New Guinea. The ages were used to calibrate part of the 14C time scale and toExpand
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Extremely Large Variations of Atmospheric 14C Concentration During the Last Glacial Period
A long record of atmospheric 14C concentration, from 45 to 11 thousand years ago (ka), was obtained from a stalagmite with thermal-ionization mass-spectrometric 230Th and acceleratorExpand
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Age and whole rock–glass compositions of proximal pyroclastics from the major explosive eruptions of Somma-Vesuvius: A review as a tool for distal tephrostratigraphy
Abstract A review of compositional data of the major explosive eruptions of Vesuvius is presented, comparing compositions (major elements) of whole rock with glass shards from the proximal deposits,Expand
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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 sampleExpand
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Episode of Strengthened Summer Monsoon Climate of Younger Dryas Age on the Loess Plateau of Central China
Abstract The Baxie loess section, just east of the Tibetan Plateau, contains evidence showing that the Asian monsoon climate experienced an abrupt reversal near the end of the last glacial age. RapidExpand
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Variability of Monsoon Climate in East Asia at the End of the Last Glaciation
Abstract High-resolution paleomonsoon proxy records from peat and eolian sand–paleosol sequences at the desert–loess transition zone in China denote a rapid oscillation from cold–dry conditionsExpand
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Radiocarbon dating of the Shroud of Turin
Very small samples from the Shroud of Turin have been dated by accelerator mass spectrometry in laboratories at Arizona, Oxford and Zurich. As controls, three samples whose ages had been determinedExpand
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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 dateExpand
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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 ofExpand
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Peat record reflecting Holocene climatic change in the Zoigê Plateau and AMS radiocarbon dating
Through the use of reliable AMS dating of high resolution (15–30 years) peat and the establishment of monsoon climate proxies sequence, we have been able to recognize several cold, dry events in theExpand
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