Quaternary Geochronology, Journal Year: 2024, Volume and Issue: 83, P. 101572 - 101572

Published: June 23, 2024

The existing radiocarbon (14C) dating framework for Lagar Velho is broadly consistent but provides limited constraint on several geoarchaeological complexes (GCs) and does not favour detailed chronological comparisons across all sectors of the site; including stratigraphically disconnected child burial complex in east area broader archaeological sequence central-west area. In this study, we undertake a complementary assessment Rock Shelter using single-grain quartz OSL, TT-OSL combined U-series/ESR fossil teeth, with aim establishing more comprehensive reconstructions events placing human occupation firmer regional climatic context. Expanding original also compare published 14C datasets against widely used sample quality indicators (i.e., organic preservation contamination proxies) to ensure reliable our new luminescence ages. Eight samples pass stratigraphic hygiene criteria are included final evaluations. Ten twelve optical produce homogeneous equivalent dose (De) indicative suitable daylight exposure. replicate De exhibit pronounced scatter, enhanced potential insufficient bleaching residual doses some karst settings. enamel dated span relatively low natural ranges, necessitating inclusion maximum (Dmax)-adjusted response curve fitting additional background noise subtraction avoid biases up 13%. Stratigraphically ages (n=26) spanning full infill obtained four different methods, providing robust interpretive underscoring significant role OSL refining early Upper Palaeolithic histories Iberia. Bayesian modelling dataset reveals site accumulation history 35,750–23,440 cal. BP improved age constraints GCs; particularly al, bs, tc, gs ls deposits that were previously undated or imprecisely constrained. refined 29,410–28,280 BP, potentially occurring within Greenland Interstadial 4. Comparison modelled GC from west-central areas enables temporal correlations depositional site. This analysis suggests Late Gravettian statistically indistinguishable based current evidence. assessments reveal three periods at Velho: (including shorter duration event) 31.6–26.0 ka end Heinrich Stadial (HS) 3 until emergence HS2; Terminal 26.5–24.5 coinciding Middle Solutrean 25.2–23.4 extending HS2 3. timing these occupations during late Marine Isotope Stage (MIS) MIS 2 highlights significance central western Portugal supporting populations when much Europe was experiencing extreme cold, aridity expanded glacial coverage.

Language: Английский