Dating of<i>Rattus exulans</i>and bird bone from Pleasant River (Otago, New Zealand): Radiocarbon anomalies from diet

Beavan, Nancy; Sparks, R. J.

doi:10.1080/03014223.2001.9517675

Cited by 16 publications

(4 citation statements)

References 25 publications

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“…One ca. 500-mg piece of vesicular bone from the mastodon's scapula was chemically pretreated and gelatinized (Beavan Athfield and Sparks, 2001). The resulting gelatinized collagen preparation was analyzed by accelerator mass spectrometer (AMS; Stafford et al,1991) by the Rafter Radiocarbon Laboratory, GNS Science, New Zealand, yielding a date of 9863 ± 40 14 C yr BP (NZA 29236; Table 1; Appendix).…”

Section: Methods and Resultsmentioning

confidence: 99%

Post-Clovis survival of American Mastodon in the southern Great Lakes Region of North America

Woodman

Beavan

2009

Quat. res.

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The end of the Pleistocene in North America was marked by a wave of extinctions of large mammals, with the last known appearances of many species falling between ca. 11,000–10,000 14C yr BP. Temporally, this period overlaps with the Clovis Paleoindian cultural complex (11,190–10,530 14C yr BP) and with sudden climatic changes that define the beginning of the Younger Dryas chronozone (ca. 11,000–10,000 14C yr BP), both of which have been considered as potential proximal causes of this extinction event. Radiocarbon dating of enamel and filtered bone collagen from an extinct American Mastodon (Mammut americanum) from northern Indiana, USA, by accelerator mass spectrometer yielded direct dates of 10,055 ± 40 14C yr BP and 10,032 ± 40 14C yr BP, indicating that the animal survived beyond the Clovis time period and into the late Younger Dryas. Although the late survival of this species in mid-continental North America does not remove either humans or climatic change as contributing causes for the late Pleistocene extinctions, neither Clovis hunters nor the climatic perturbations initiating the Younger Dryas chronozone were immediately responsible for driving mastodons to extinction.

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Section: Methods and Resultsmentioning

confidence: 99%

Post-Clovis survival of American Mastodon in the southern Great Lakes Region of North America

Woodman

Beavan

2009

Quat. res.

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“…Few attempts have been made to calibrate radiocarbon dates on such animals (see Beavan‐Athfield & Sparks ; Higham et al . ).…”

Section: New Workmentioning

confidence: 99%

Colonisation of Remote Oceania: New dates for the Bapot‐1 site in the Mariana Islands

Petchey

Clark

Winter

et al. 2016

Archaeology in Oceania

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Abstract:The colonisation of the Mariana Islands in Western Micronesia is likely to represent a long distance ocean dispersal of more than 2000 km, and establishing the date of human arrival in the archipelago is important for modelling Neolithic expansion in Island Southeast Asia and the Pacific. In 2010, Clark et al. published a paper discussing a number of radiocarbon dates from the Bapot-1 site on Saipan Island, but a disparity between charcoal and marine shell (Anadara sp.) results prevented the calculation of a definitive age for the site and left open the possibility that Bapot-1 was first settled as early as 3500 cal BP. Here we present new research using a combination of stable isotope (δ 13 C and δ 18 O) and 14 C information to demonstrate that A. antiquata from the lowest layers of Bapot-1 is affected by hardwaters. These new results indicate human arrival at Bapot-1 occurred around 3200-3080 cal. BP (1250-1130 BC). We recommend a similar isotopic evaluation for other sites in the Marianas that are dated by marine shell.

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“…K.W. commissioned five postcranial bone samples for acceleratory mass spectrometry 14 C dating by Rafter Radiocarbon Laboratory who used a modified Longin method as described by Beavan‐Athfield and Sparks (). Rafter Radiocarbon used sample δ 13 C to indicate collagen quality, accepting samples that fall between −19 and −22‰.…”

Section: Methodsmentioning

confidence: 99%

Re-evaluating the Late Quaternary fossil mammal assemblage of Seton Rockshelter, Kangaroo Island, South Australia, including the evidence for late-surviving megafauna

et al. 2015

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It is widely accepted that most larger Australian vertebrates were extinct by 40 ka. The reliability of <20-ka radiocarbon ( 14 C) ages on charcoal stratigraphically associated with sthenurine (short-faced) kangaroo tooth fragments from Seton Rockshelter, Kangaroo Island, have therefore proven contentious. Some researchers have argued these fossils were in situ, while others have claimed they were reworked. To address this we obtained new 14 C ages on bones from the site. These bone ages are not only consistent with earlier charcoal ages, but are in near-perfect stratigraphic order, providing strong support for the site's stratigraphic integrity. Our analyses indicate units aged 21À17 ka were primarily accumulated by Tasmanian devils (Sarcophilus harrisii) and owls (Tyto species), after which humans became the primary accumulation agent. The tight chronology, faunal trends and current lack of evidence for older layers from which specimens could have been reworked suggest the sthenurine remains may be in situ. However, because attempts to directly date sthenurine material failed, we cannot confidently assert that they survived to this time. Therefore, Seton Rockshelter may be best excluded from the Pleistocene extinction debate until the site can be re-excavated and more conclusive evidence collected, including more complete or directly datable sthenurine remains.

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Dating ofRattus exulansand bird bone from Pleasant River (Otago, New Zealand): Radiocarbon anomalies from diet

Cited by 16 publications

References 25 publications

Post-Clovis survival of American Mastodon in the southern Great Lakes Region of North America

Post-Clovis survival of American Mastodon in the southern Great Lakes Region of North America

Colonisation of Remote Oceania: New dates for the Bapot‐1 site in the Mariana Islands

Re-evaluating the Late Quaternary fossil mammal assemblage of Seton Rockshelter, Kangaroo Island, South Australia, including the evidence for late-surviving megafauna

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