An early Brunhes (<0.78 Ma) age for the Lower Paleolithic tool-bearing Kozarnika cave sediments, Bulgaria

Muttoni, Giovanni; Sirakov, Nikolas; Guadelli, Jean-Luc; Kent, Dennis V.; Scardia, Giancarlo; Monesi, Edoardo; Zerboni, Andrea; Ferrara, Enzo

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 13aec) lie in the early Brunhes at a nominal maximum age of ~0.75 Ma, while the Brunhes eMatuyama 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.

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Quaternary Science Reviews

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Academic Units
Lamont-Doherty Earth Observatory
Biology and Paleo Environment
Published Here
December 6, 2017