An early Brunhes (<0.78 Ma) age for the Lower Paleolithic tool-bearing Kozarnika cave sediments, Bulgaria
作者： Giovanni Muttoni , Nikolas Sirakov , Jean-Luc Guadelli , Dennis V. Kent , Giancarlo Scardia
DOI: 10.1016/J.QUASCIREV.2017.10.034
关键词: Magnetic polarity 、 Polarity (physics) 、 Loess 、 Lower Paleolithic 、 Sediment 、 Magnetostratigraphy 、 Paleontology 、 Cave 、 Sedimentary rock 、 Geology
摘要: Abstract We present a new sedimentological profile and magnetostratigraphy of the tool-bearing Kozarnika cave sediments from Bulgaria. Modal analysis infilling sedimentary texture indicates that layers contain sizable fraction sediment interpreted as loess. also find evidence for relatively thick well defined normal magnetic polarity in upper-middle part section record Brunhes Chron, followed down-section by reverse directions Matuyama Chron. The lowermost levels with Lower Paleolithic tools (Layers 13a–c) lie early at nominal maximum age ∼0.75 Ma, while Brunhes–Matuyama boundary (0.78 Ma) falls Layer 13 immediately below. This finding represents conspicuous revision previous estimates same layers.
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