globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2018.05.015
Scopus记录号: 2-s2.0-85047261788
论文题名:
Pleistocene paleosol development and paleoenvironmental dynamics in East Africa: A multiproxy record from the Homo-bearing Aalat pedostratigraphic succession, Dandiero basin (Eritrea)
作者: Scarciglia F.; Mercatante G.; Fondevilla V.; Anadón P.; Oms O.; Donato P.; Agnini C.; Papini M.; Rook L.; Ghinassi M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 191
起始页码: 275
结束页码: 298
语种: 英语
英文关键词: Aeolian dust ; Calcrete ; East Africa ; Gypcrete ; Paleoclimate changes ; Paleosol genesis ; Pleistocene ; Stable isotopes
Scopus关键词: Biological materials preservation ; Chemical stability ; Climate change ; Dust ; Isotopes ; Stratigraphy ; Aeolian dusts ; Calcretes ; East Africa ; Gypcrete ; Paleoclimate change ; Paleosol genesis ; Pleistocene ; Stable isotopes ; Biodiversity ; arid region ; ecosystem dynamics ; eolian deposit ; fluviolacustrine deposit ; hominid ; magnetostratigraphy ; paleoenvironment ; paleosol ; pedogenesis ; Pleistocene ; proxy climate record ; sedimentation ; soil horizon ; stable isotope ; Central African Republic ; East Africa ; Homo erectus
英文摘要: The climatic changes during the Early-Middle Pleistocene transition are a key to understand the ecosystem dynamics that involved the Homo erectus-ergaster distribution. The Aalat pedostratigraphic succession represents a continental archive in the African Rift Valley (Eritrea), where remains of Homo around 1 Ma were identified. High-resolution magnetostratigraphy dated this succession between the base of the Jaramillo subchron and the lower Brunhes chron. Despite the present arid, desert climate, the Aalat section records a persistence of water-driven, fluvio-lacustrine environments, which suggests a major tectonic control on sedimentation, although climate changes are clearly overprinted. Macro- and micromorphological, physico-chemical, mineralogical and geochemical features, up to now poorly available for Pleistocene paleosols in East Africa, depict a poor to moderate degree of development, although calcic and petrocalcic/petrogypsic horizons at different stratigraphic heights indicate phases of geomorphic stability. The concurrent alternation of these horizons with iron-stained layers suggests cyclical changes from dry to wet conditions, which fit well with aeolian dust fluxes and marine isotope stages of glacials and interglacials at higher latitudes. Stable isotope data are consistent with these climatic cycles and suggest a succession of monsoonal and non-monsoonal conditions. The Homo erectus settlement lasted apparently for a short time span, because a long, high-discharge fluvial sedimentation (and/or an aridity phase at the base of the fluvial facies) could have made the area less suitable for human settling and could have hindered preservation of fossils and artifacts. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112170
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作者单位: Dipartimento di Biologia, Ecologia e Scienze della Terra (DiBEST), Università della Calabria, Via P. Bucci – Cubo 15B, Arcavacata di Rende (CS), 87036, Italy; Institut Català de Paleontologia Miquel Crusafont, Carrer de l'Escola Industrial 23, Sabadell, Catalonia 08201, Spain; Institut de Ciències de la Terra Jaume Almera CSIC, Barcelona, 08025, Spain; Departamento de Geologia, Universitat Autònoma de Barcelona, Bellaterra, 08193, Spain; Dipartimento di Geoscienze, Università di Padova, Via Gradenigo 6, Padova, 35121, Italy; Dipartimento di Scienze della Terra, Università di Firenze, Via G. La Pira 4, Firenze, 50121, Italy

Recommended Citation:
Scarciglia F.,Mercatante G.,Fondevilla V.,et al. Pleistocene paleosol development and paleoenvironmental dynamics in East Africa: A multiproxy record from the Homo-bearing Aalat pedostratigraphic succession, Dandiero basin (Eritrea)[J]. Quaternary Science Reviews,2018-01-01,191
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