Artículos de revistas
An early Brunhes (<0.78 Ma) age for the Lower Paleolithic tool-bearing Kozarnika cave sediments, Bulgaria
Fecha
2017-12-15Registro en:
Quaternary Science Reviews, v. 178, p. 1-13.
0277-3791
10.1016/j.quascirev.2017.10.034
2-s2.0-85032969860
2-s2.0-85032969860.pdf
Autor
Università degli Studi di Milano
ALP - Alpine Laboratory of Paleomagnetism
National Institute of Archaeology and Museum of Bulgarian Academy of Sciences
Université de Bordeaux
Rutgers University
Lamont-Doherty Earth Observatory of Columbia University
Universidade Estadual Paulista (Unesp)
INRIM
Institución
Resumen
We present a new sedimentological profile and a magnetostratigraphy of the tool-bearing Kozarnika cave sediments from Bulgaria. Modal analysis of cave infilling sedimentary texture indicates that the tool-bearing layers contain a sizable fraction of sediment interpreted as loess. We also find evidence for a relatively thick and well defined normal magnetic polarity in the upper-middle part of the section interpreted as a record of the Brunhes Chron, followed down-section by reverse polarity directions interpreted as a record of the Matuyama Chron. The lowermost levels with Lower Paleolithic tools (Layers 13a–c) lie in the early Brunhes at a nominal maximum age of ∼0.75 Ma, while the Brunhes–Matuyama boundary (0.78 Ma) falls in Layer 13 Lower immediately below. This finding represents a conspicuous revision of previous age estimates for the same tool-bearing layers.