Universität zu Köln

Bartz, Melanie ORCID: 0000-0002-4703-6057, Rixhon, Gilles, Kehl, Martin ORCID: 0000-0003-4587-5858, El Ouahabi, Meriam ORCID: 0000-0003-2095-1826, Klasen, Nicole, Brill, Dominik ORCID: 0000-0001-8637-4641, Weniger, Gerd-Christian, Mikdad, Abdeslam and Brueckner, Helmut (2017). Unravelling fluvial deposition and pedogenesis in ephemeral stream deposits in the vicinity of the prehistoric rock shelter of Ifri n'Ammar (NE Morocco) during the last 100 ka. Catena, 152. S. 115 - 135. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 1872-6887

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Abstract

Our study focuses on the ephemeral stream deposits of Wadi Selloum to identify phases of morphodynamic stability (pedogenesis) and activity (flooding) in the direct vicinity of the rock shelter of Ifri n'Ammar (NE Morocco). As one of the oldest settlement sites of anatomically modern humans (AMH) in North Africa, Ifri n'Ammar documents periodical occupations since similar to 170 ka. Since the discontinuous settlement record may reflect climate forcing with subsequent landscape changes, we aim at reconstructing the palaeoenvironmental variability recorded in the ephemeral stream deposits. In addition to the use of micromorphological, seditnentological, geochemical and mineralogical methods, the geochronological framework of ephemeral stream deposits was established by the application of different luminescence dating techniques. The deposition ages between 102 +/- 8 ka and 13 +/- 0.2 ka span different morphodynamically stable and active phases. Periods of enhanced aggradation occurred around similar to 100 ka, similar to 75 ka, similar to 55 ka, after the LGM, and during the Holocene, whilst sedimentation ended after similar to 13 ka. The Wadi Selloum might be characterised by enhanced flooding during humid phases. Pedogenesis may be used as environmental indicator for more humid climate conditions during MIS 3 (palaeo-Calcisol), the early Holocene (Calcisol) and the late Holocene (Fluvisol). This study thus provides first insights into the palaeoenvironmental changes around the rock shelter of Ifri n'Ammar during the last glacial-interglacial cycle. (C) 2016 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 Rixhon, Gilles UNSPECIFIED UNSPECIFIED UNSPECIFIED Kehl, Martin UNSPECIFIED orcid.org/0000-0003-4587-5858 UNSPECIFIED El Ouahabi, Meriam UNSPECIFIED orcid.org/0000-0003-2095-1826 UNSPECIFIED Klasen, Nicole UNSPECIFIED UNSPECIFIED UNSPECIFIED Brill, Dominik UNSPECIFIED orcid.org/0000-0001-8637-4641 UNSPECIFIED Weniger, Gerd-Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Mikdad, Abdeslam UNSPECIFIED UNSPECIFIED UNSPECIFIED Brueckner, Helmut UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-233637
DOI:	10.1016/j.catena.2016.12.007
Journal or Publication Title:	Catena
Volume:	152
Page Range:	S. 115 - 135
Date:	2017
Publisher:	ELSEVIER SCIENCE BV
Place of Publication:	AMSTERDAM
ISSN:	1872-6887
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language REGENERATIVE-DOSE PROTOCOL; LOWER MOULOUYA RIVER; LATE-PLEISTOCENE; CLIMATE-CHANGE; LUMINESCENCE SIGNALS; NORTHEASTERN MOROCCO; SOIL CHRONOSEQUENCE; CHRONOMETRIC DATA; NORTHERN TUNISIA; SOUTHEAST SPAIN Multiple languages Geosciences, Multidisciplinary; Soil Science; Water Resources Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23363