Paleosols, bones, phytoliths, and δ13C signatures of humus and teeth in the alluvial sequence of Axamilpa, Puebla : Inferences for landscape evolution and megafauna paleoecology during MIS 3–2 in Southern Mexico

Landscapes and soils through time

Auteur(s) et Affiliation(s)

TOVAR, R.E.

Inst. de Geología, UNAM, Mexico, Mexique

SEDOV, S.

Inst. de Geología, UNAM, Mexico, Mexique

MONTELLANO-BALLESTEROS, M.

Inst. de Geología, UNAM, Mexico, Mexique

SOLLEIRO, E.

Inst. de Geología, UNAM, Mexico, Mexique

BENAMMI, M.

IPHEP, UMR-CNRS 7262, Univ., Poitiers, France

SAUER, D.

Inst. of Geography, Univ. of Technology, Dresden, Allemagne

JAHN, R.

Soil Science and Soil Protection Group, Univ., Halle, Allemagne

STAHR, K.

Inst. of Soil Science and Land Evaluation, Univ. of Hohenheim, Stuttgart, Allemagne

Description :
The study area, Axamilpa, is located close to the town of Tepexi de Rodríguez in the state of Puebla. The goal of this work is to reconstruct the past environmental conditions through the study of 3 proxies : paleosols, paleobotanical records (stable carbon isotopes and phytoliths) and mammalian fossil remains incorporated in an alluvial paleosol-sedimentary sequence. The AA. interpret the Late Pleistocene landscape of this area as a heterogeneous forest–grassland landscape with the forest shrinking through time and the grass areas increasing. Both isotope and phytolith records demonstrate a contrasting difference between Pleistocene and recent vegetation dominated by xerophytic shrubs and succulents. This vegetation change could play important role in the extinction of Pleistocene megafauna.

Type de document :
Congrès

Source :
International Conference Landscapes and Soils through Time, Stuttgart, Allemagne, 2011-07-29/2011-08-01, Catena (Giessen), issn : 0341-8162, 2014, vol. 112, p. 25-37, nombre de pages : 13, Références bibliographiques : 1 p.

Date :
2014

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais