Universität zu Köln

Roberts, Helen M., Ramsey, Christopher Bronk, Chapot, Melissa S., Deino, Alan L., Lane, Christine S., Vidal, Celine, Asrat, Asfawossen, Cohen, Andrew, Foerster, Verena, Lamb, Henry F., Schaebitz, Frank, Trauth, Martin H. and Viehberg, Finn A. (2021). Using multiple chronometers to establish a long, directly-dated lacustrine record: Constraining > 600,000 years of environmental change at Chew Bahir, Ethiopia. Quat. Sci. Rev., 266. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1873-457X

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Abstract

Despite eastern Africa being a key location in the emergence of Homo sapiens and their subsequent dispersal out of Africa, there is a paucity of long, well-dated climate records in the region to contextualize this history. To address this issue, we dated a similar to 293 m long composite sediment core from Chew Bahir, south Ethiopia, using three independent chronometers (radiocarbon, Ar-40/Ar-39, and optically stimulated luminescence) combined with geochemical correlation to a known-age tephra. The site is located in a climatically sensitive region, and is close to Omo Kibish, the earliest documented Homo sapiens fossil site in eastern Africa, and to the proposed dispersal routes for H. sapiens out of Africa. The 30 ages generated by the various techniques are internally consistent, stratigraphically coherent, and span the full range of the core depth. A Bayesian age-depth model developed using these ages results in a chronology that forms one of the longest independently dated, high-resolution lacustrine sediment records from eastern Africa. The chronology illustrates that any record of environmental change preserved in the composite sediment core from Chew Bahir would span the entire timescale of modern human evolution and dispersal, encompassing the time period of the transition from Acheulean to Middle Stone Age (MSA), and subsequently to Later Stone Age (LSA) technology, making the core well-placed to address questions regarding environmental change and hominin evolutionary adaptation. The benefits to such studies of direct dating and the use of multiple independent chronometers are discussed. (C) 2021 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Roberts, Helen M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ramsey, Christopher Bronk UNSPECIFIED UNSPECIFIED UNSPECIFIED Chapot, Melissa S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Deino, Alan L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lane, Christine S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vidal, Celine UNSPECIFIED UNSPECIFIED UNSPECIFIED Asrat, Asfawossen UNSPECIFIED UNSPECIFIED UNSPECIFIED Cohen, Andrew UNSPECIFIED UNSPECIFIED UNSPECIFIED Foerster, Verena UNSPECIFIED UNSPECIFIED UNSPECIFIED Lamb, Henry F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schaebitz, Frank UNSPECIFIED UNSPECIFIED UNSPECIFIED Trauth, Martin H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Viehberg, Finn A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-600297
DOI:	10.1016/j.quascirev.2021.107025
Journal or Publication Title:	Quat. Sci. Rev.
Volume:	266
Date:	2021
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	1873-457X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LATER STONE-AGE; KIBISH FORMATION; NORTHERN KENYA; SINGLE-ALIQUOT; MODERN HUMANS; HOMO-SAPIENS; GODA BUTICHA; EAST-AFRICA; COSMIC-RAY; OMO I Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/60029