<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Benito-Calvo, Alfonso</style></author><author><style face="normal" font="default" size="100%">Barfod, Dan N</style></author><author><style face="normal" font="default" size="100%">McHenry, Lindsay J</style></author><author><style face="normal" font="default" size="100%">de la Torre, Ignacio</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The geology and chronology of the Acheulean deposits in the Mieso area (East-Central Ethiopia).</style></title><secondary-title><style face="normal" font="default" size="100%">J Hum Evol</style></secondary-title><alt-title><style face="normal" font="default" size="100%">J. Hum. Evol.</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Archaeology</style></keyword><keyword><style  face="normal" font="default" size="100%">Chronology as Topic</style></keyword><keyword><style  face="normal" font="default" size="100%">Ethiopia</style></keyword><keyword><style  face="normal" font="default" size="100%">Geologic Sediments</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2014 Nov</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.ncbi.nlm.nih.gov/pubmed/25440135</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">76</style></volume><pages><style face="normal" font="default" size="100%">26-38</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;This paper presents the Quaternary sequence of the Mieso area of Central-East Ethiopia, located in the piedmont between the SE Ethiopian Escarpment and the Main Ethiopian Rift-Afar Rift transition sector.In this region, a piedmont alluvial plain is terraced at þ25 m above the two main fluvial courses, the Mieso and Yabdo Rivers. The piedmont sedimentary sequence is divided into three stratigraphic units separated by unconformities. Mieso Units I and II contain late Acheulean assemblages and a weakly consolidated alluvial sequence, consisting mainly of fine sediments with buried soils and, to a lesser degree, conglomerates. Palaeo-wetland areas were common in the alluvial plain, represented by patches of tufas, stromatolites and clays. At present, the piedmont alluvial surface is preserved mainly on a dark brown soil formed at the top of Unit II. Unit III corresponds to a fluvial deposit overlying Unit II, and is defined by sands, silty clays and gravels, including several Later Stone Age (LSA) occurrences. Three fine-grained tephra levels are interbedded in Unit I (tuffs TBI and TA) and II (tuff CB), and are usually spatially-constrained and reworked. Argon/argon (40Ar/39Ar) dating from tuff TA, an ash deposit preserved in a palustrine environment, yielded an age of 0.212 ± 0.016 Ma (millions of years ago). This date places thetop of Unit I in the late Middle Pleistocene, with Acheulean sites below and above tuff TA. Regional correlations tentatively place the base of Unit I around the Early-Middle Pleistocene boundary, Unit II inthe late Middle Pleistocene and within the Late Pleistocene, and the LSA occurrences of Unit III in the LatePleistoceneeHolocene.&lt;/p&gt;</style></abstract><notes><style face="normal" font="default" size="100%">http://www.sciencedirect.com/science/article/pii/S0047248414002061</style></notes><custom1><style face="normal" font="default" size="100%">http://www.ncbi.nlm.nih.gov/pubmed/25440135?dopt=Abstract</style></custom1></record></records></xml>