La datation ESR/U-Th de restes paléontologiques,un outil pour estimer le possible remaniementdes niveaux archéologiques ?

Electron spin resonance dating of optically bleached quartz grains from the Middle Palaeolithic site of Cuesta de la Bajada (Spain) using the multiple centres approach

“…While the ESR and OSL ages on quartz grains range between 250 and Arnold et al, 2016), amino acid racemization (AAR) analysis of five equid teeth from CB-3 provided an older chronology, with a mean age of 431 ± 44 ka. Additionally, combined US-ESR dating of four fossil teeth collected from CB-3 provided very scattered results ranging from 215 ± 15 ka to 737 ± 69 ka (Bahain et al, 2015). The considerable amount of scatter in these US-ESR ages is likely attributable to the unexpectedly large variability in the observed D E values (55%, corresponding to 1 standard deviation), and precludes the calculation of a meaningful mean age.…”

Past extinctions of homo species coincided with increased vulnerability to climatic change

“…[25][26][27] On the continent, the youngest possible H. erectus occurrences in Asia at Zhoukoudian (154 ka in age 44 ) and Dingcun (185 ka in age 45 ) predate Denisovans and postdate the latest occurrence of H. heidelbergensis in the region, 46 which means that H. erectus did not live along with other hominins. In the case of H. heidelbergensis, the youngest localities are scattered worldwide, from Spain (Trinchera Galeria 47 ) to China (Jinniushan 48 ). All these localities are at least some 50 ka older than the first occurrence of H. sapiens outside the African continent at Mislyia.…”

Past Extinctions of Homo Species Coincided with Increased Vulnerability to Climatic Change

“…On the continent, the youngest possible H. erectus occurrences in Asia at Zhoukoudian (154 ka in age 44 ), and Dingcun (185 ka in age 45 ) predate Denisovans and post-date the latest occurrence of Homo heidelbergensis in the region 46 which means that H. erectus did not live along with other hominins. In the case of Homo heidelbergensis, the youngest localities are scattered worldwide, from Spain (Trinchera Galeria 47 ) to China (Jinniushan 48 ). All these localities are at least some 50 ka older than the first occurrence of Homo sapiens outside the African continent at Mislyia 49 .…”