Late Pleistocene mammoth remains from Coastal Maine, USA
| Autor: | Daniel C. Fisher, Christopher C. Dorion, Thomas K Weddle, B. Gary Hoyle, Lisa L. Churchill-Dickson, Harold W. Borns |
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| Rok vydání: | 2004 |
| Předmět: |
010506 paleontology
geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Woolly mammoth biology Pleistocene biology.organism_classification 01 natural sciences Paleontology Arts and Humanities (miscellaneous) visual_art Deglaciation Tusk visual_art.visual_art_medium General Earth and Planetary Sciences Transgressive Ice sheet Geology 0105 earth and related environmental sciences Earth-Surface Processes Mammoth Marine transgression |
| Zdroj: | Quaternary Research. 61:277-288 |
| ISSN: | 1096-0287 0033-5894 |
| Popis: | Remains identified as those of a woolly mammoth (Mammuthus primigenius) dated at 12,200 ± 55 14C yr B.P. were recovered while excavating in a complex sequence of glaciomarine sediments in Scarborough, Maine, USA. The mammoth was found in the top meter of a fossiliferous unit of mud and sand laminites. These sediments were deposited during a marine regressive phase following the transgression that accompanied northward retreat of the margin of the Laurentide ice sheet. A Portlandia arctica valve from the underlying transgressive unit provides a minimum age of 14,820 ± 105 14C yr B.P. for local deglaciation. The mammoth, an adult female, died in midwinter with no evidence of human involvement. Tusk growth rates and oxygen-isotope variation over the last few years of life record low seasonality. The mammoth was transported to the site as a partial carcass by the late-glacial proto-Saco River. It sank in a near-shore setting, was subjected to additional disarticulation and scattering of elements, and was finally buried in sediments reworked by the shallowing sea. |
| Databáze: | OpenAIRE |
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