Development of low-background vacuum extraction and graphitization systems for 14C dating of old (40–60 ka) samples

Pigati, Jeffrey S.; Quade, Jay; Wilson, Jim; Jull, A. J. T.; Lifton, Nathaniel A.

doi:10.1016/j.quaint.2006.12.006

Cited by 107 publications

(67 citation statements)

References 14 publications

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“…The erosion surface bounding units C1 and C2 could represent a temporary deepening of the channels during MIS 4 or in the early MIS 3, while the overlying Unit C2, coarser and dominated by sandy layers, could be related to MIS 3 according to the radiocarbon age (30 875 AE 820 14 C a BP) obtained from the soil developed at the top of the unit. The reliability of this age, obtained from bulk sediment, is questionable owing to the possibility of both contamination (Pigati et al, 2007) and of reservoir effects. The pollen record from this soil is consistent with a cold temperate environment.…”

Section: Discussionmentioning

confidence: 99%

Middle to Late Pleistocene palaeoenvironmental evolution of the southeastern Alpine Valeriano Creek succession (northeastern Italy)

Monegato

Lowick

Ravazzi

et al. 2009

J Quaternary Science

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The Middle-Late Pleistocene alluvial and lacustrine succession of Valeriano Creek (southeastern Alpine foothills, 190 m a.s.l.) documents the environmental evolution of the piedmont plain before the onset of the Last Glacial Maximum (LGM). The sedimentary record was investigated by multidisciplinary stratigraphical and sedimentological studies coupled with petrographic and palaeobotanical analysis. A chronology has been provided by luminescence, radiocarbon dating and pollen biochronology. The succession developed at the valley mouth of a small catchment and is confined in the piedmont plain by the alluvial fans of major rivers. The oldest deposits were formed during a cold phase during the late Middle Pleistocene. This part of the piedmont plain was generally stable until Termination II, when it was trenched more than 15 m deep by watercourses. The infilling succession of the trench, mostly by low-energy alluvial sediments interbedded with mire and peat deposits, documents, for the first time on the southern side of the Alps, the relationships between fluvial activity, vegetation and climate change at the foothills piedmont plain during late Marine Isotope Stage (MIS) 5. The stadial-interstadial climate forcing implies a local reorganisation of fluvial dynamics and of forest composition, although substantial plant cover persisted even during cooler stadials. In accordance with coeval alluvial and speleothem records from the northern side of the Alps, this environmental evolution supports a very restricted Alpine glaciation of the main fluvial catchments of the southeastern Alps during MIS 5a-d.

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Section: Discussionmentioning

confidence: 99%

Middle to Late Pleistocene palaeoenvironmental evolution of the southeastern Alpine Valeriano Creek succession (northeastern Italy)

Monegato

Lowick

Ravazzi

et al. 2009

J Quaternary Science

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“…14 C ages of very old samples should generally be interpreted with caution (e.g., Pigati et al, 2007) because extremely small contamination with modern carbon may greatly affect the result of dating. The extensive 14 C dating of the yedoma profile at Duvanny Yar (Fig.…”

Section: Paleoenvironmental Analysis Of Permafrost Deposits At Batagamentioning

confidence: 99%

Preliminary paleoenvironmental analysis of permafrost deposits at Batagaika megaslump, Yana Uplands, northeast Siberia

et al. 2017

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A megaslump at Batagaika, in northern Yakutia, exposes a remarkable stratigraphic sequence of permafrost deposits 50-80 m thick. To determine their potential for answering key questions about Quaternary environmental and climatic change in northeast Siberia, we carried out a reconnaissance study of their cryostratigraphy and paleoecology, supported by four rangefinder 14 C ages. The sequence includes two ice complexes separated by a unit of fine sand containing narrow syngenetic ice wedges and multiple paleosols. Overall, the sequence developed as permafrost grew syngenetically through an eolian sand sheet aggrading on a hillslope. Wood remains occur in two forest beds, each associated with a reddened weathering horizon. The lower bed contains high amounts of Larix pollen (>20%), plus small amounts of Picea and Pinus pumila, and is attributed to interglacial conditions. Pollen from the overlying sequence is dominated by herbaceous taxa (~70%-80%) attributed to an open tundra landscape during interstadial climatic conditions. Of three hypothetical age schemes considered, we tentatively attribute much of the Batagaika sequence to Marine Oxygen Isotope Stage (MIS) 3. The upper and lower forest beds may represent a mid-MIS 3 optimum and MIS 5, respectively, although we cannot discount alternative attributions to MIS 5 and 7.

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“…One of the wood fragments gave an uncalibrated radiocarbon age of~45 ka. Because this age is near the effective limit of radiocarbon dating, it is not known whether this apparently finite age accurately dates the deposit or is in fact considerably older (see discussion in Pigati et al (2007)). Assuming that it does provide a relatively close minimum-limiting age for the underlying marine deposits, the marine terrace could date to the same MIS 3 high-sea stand of~45e50 ka as the terraces found at Isla Vista and Ventura.…”

Section: Comparison Of Channel Islands Uplift Rates With Other Localimentioning

confidence: 99%

Coastal tectonics on the eastern margin of the Pacific Rim: late Quaternary sea-level history and uplift rates, Channel Islands National Park, California, USA

Muhs

Simmons

Schumann

et al. 2014

Quaternary Science Reviews

150

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Development of low-background vacuum extraction and graphitization systems for 14C dating of old (40–60 ka) samples

Cited by 107 publications

References 14 publications

Middle to Late Pleistocene palaeoenvironmental evolution of the southeastern Alpine Valeriano Creek succession (northeastern Italy)

Middle to Late Pleistocene palaeoenvironmental evolution of the southeastern Alpine Valeriano Creek succession (northeastern Italy)

Preliminary paleoenvironmental analysis of permafrost deposits at Batagaika megaslump, Yana Uplands, northeast Siberia

Coastal tectonics on the eastern margin of the Pacific Rim: late Quaternary sea-level history and uplift rates, Channel Islands National Park, California, USA

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