Carbon and oxygen stable isotope compositions of late Pleistocene mammal teeth from dolines of Ajoie (Northwestern Switzerland). Issue 2 (September 2014)

• Record Type: Journal Article
• Authors: Scherler, Laureline; Tütken, Thomas; Becker, Damien
• Is Part Of: Quaternary research. Volume 82:Issue 2(2014)
• Page Start: 378
• Page End: 387
• Publication Date: 2014-09
• Subjects: Megaherbivores, -- Tooth enamel, -- Early Glacial, -- Middle Pleniglacial, -- Paleoenvironment, -- Paleoclimate, -- Paleodiet; Geology, Stratigraphic -- Quaternary -- Periodicals; Glacial epoch -- Periodicals; Stratigraphie -- Quaternaire -- Périodiques; Époque glaciaire -- Périodiques; Geology, Stratigraphic; Glacial epoch; Quaternary Geologic Period; Electronic journals; Periodicals; 551.79
• DOI: 10.1016/j.yqres.2014.05.004
• Languages: English
• ISSNs: 0033-5894

Abstract

Abstract: Fossils of megaherbivores from eight late Pleistocene 14 C- and OSL-dated doline infillings of Ajoie (NW Switzerland) were discovered along the Transjurane highway in the Swiss Jura. Carbon and oxygen analyses of enamel were performed on forty-six teeth of large mammals ( Equus germanicus, Mammuthus primigenius, Coelodonta antiquitatis, and Bison priscus ), coming from one doline in Boncourt (~ 80 ka, marine oxygen isotope stage MIS5a) and seven in Courtedoux (51–27 ka, late MIS3), in order to reconstruct the paleoclimatic and paleoenvironmental conditions of the region. Similar enamel δ 13 C values for both periods, ranging from − 14.5 to − 9.2‰, indicate that the megaherbivores lived in a C3 plant-dominated environment. Enamel δ 18 OPO4 values range from 10.9 to 16.3‰ with a mean of 13.5 ± 1.0‰ (n = 46). Mean air temperatures (MATs) were inferred using species-specific δ 18 OPO4 –δ 18 OH2O -calibrations for modern mammals and a present-day precipitation δ 18 OH2O -MAT relation for Switzerland. Similar average MATs of 6.6 ± 3.6°C for the deposits dated to ~ 80 ka and 6.5 ± 3.3°C for those dated to the interval 51–27 ka were estimated. This suggests that these mammals in the Ajoie area lived in mild periods of the late Pleistocene with MATs only about 2.5°C lower than modern-day temperatures.