Universität zu Köln

Bartz, Melanie ORCID: 0000-0002-4703-6057, Klasen, Nicole, Zander, Anja ORCID: 0000-0003-0449-1401, Brill, Dominik ORCID: 0000-0001-8637-4641, Rixhon, Gilles, Seeliger, Martin, Eiwanger, Josef, Weniger, Gerd-Christian, Mikdad, Abdeslam and Brueckner, Helmut (2015). Luminescence dating of ephemeral stream deposits around the Palaeolithic site of Ifri n'Ammar (Morocco). Quat. Geochronol., 30. S. 460 - 466. OXFORD: ELSEVIER SCI LTD. ISSN 1878-0350

Full text not available from this repository.

Abstract

The prehistoric site of Ifri n'Ammar is situated in northeastern Morocco, in the northern prolongation of the Middle Atlas Mountains. It is a key location in unravelling the history of anatomically modern humans (AMH) in northern Africa as it reveals Middle and Late Palaeolithic occupation phases since similar to 170 ka. Whilst the archaeological sequence within the rock shelter has been well studied, the timing of landscape dynamics around Ifri n'Ammar is still poorly understood. This study therefore aims to establish a detailed chronology of the Wadi Selloum profile at the apron of the shelter, based on optically stimulated luminescence (OSL) dating of ephemeral stream deposits. Coarse-grain quartz was used for single-grain and multiple-grain dating procedures to investigate the luminescence properties of these deposits and to get more accurate age information concerning the phases of human occupation. Continuous wave OSL (CW-OSL) revealed a dominant fast component for all quartz samples. The dose distribution of the uppermost samples showed overdispersion values >25% and significant positive skewness. We identified partial bleaching as the main source of scatter in the equivalent dose (D-e) distribution. The lowermost sample appeared to be close to signal saturation. The shapes of the dose response curve varied widely between aliquots and coarse quartz grains exhibited therefore very different dose saturation behaviours among aliquots. With fully saturated dose response curves (DRCs), meaningful D-0 values were assumed for D-e estimation. The eight OSL samples yielded stratigraphically consistent ages ranging from 1.3 +/- 0.2 ka to 76 +/- 5 ka, thus reaching the Middle Palaeolithic period. Moreover, a pottery shard dated to 7.4 +/- 0.6 ka (Early Neolithic period) by thermoluminescence (TL), perfectly matched the Holocene OSL samples extracted at the same depth of the profile. In summary, our results point to fluvial aggradation during OIS 5.1, the late glacial period, and the Holocene. (C) 2015 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bartz, Melanie UNSPECIFIED orcid.org/0000-0002-4703-6057 UNSPECIFIED Klasen, Nicole UNSPECIFIED UNSPECIFIED UNSPECIFIED Zander, Anja UNSPECIFIED orcid.org/0000-0003-0449-1401 UNSPECIFIED Brill, Dominik UNSPECIFIED orcid.org/0000-0001-8637-4641 UNSPECIFIED Rixhon, Gilles UNSPECIFIED UNSPECIFIED UNSPECIFIED Seeliger, Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED Eiwanger, Josef UNSPECIFIED UNSPECIFIED UNSPECIFIED Weniger, Gerd-Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Mikdad, Abdeslam UNSPECIFIED UNSPECIFIED UNSPECIFIED Brueckner, Helmut UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-390280
DOI:	10.1016/j.quageo.2015.02.012
Journal or Publication Title:	Quat. Geochronol.
Volume:	30
Page Range:	S. 460 - 466
Date:	2015
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	1878-0350
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language OPTICALLY STIMULATED LUMINESCENCE; DOSE-RESPONSE CURVES; FLUVIAL DEPOSITS; QUARTZ SAMPLES; COSMIC-RAY; SINGLE; GRAINS; DISTRIBUTIONS; COMPONENTS; FELDSPAR Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39028