Evidence for multiple Plio-Pleistocene lake episodes in the hyperarid Atacama Desert

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Title:Main Title: Evidence for multiple Plio-Pleistocene lake episodes in the hyperarid Atacama Desert
Description:Abstract: Cosmogenic nuclide exposure dating of ancient shoreline terraces of the Quillagua-Llamara Soledad Lake in the central Atacama Desert of northern Chile provides new insights in the paleohydrology of the driest desert on Earth. The lake developed in a paleo-endorheic drainage system in the Central Depression prior to draining into the Pacific due to incision of the Río Loa canyon. The durations of lake stages were sufficiently long to form wave-erosion induced shoreline terraces on the wind-exposed slopes of former islands. Successively younger shoreline levels are preserved over an elevation range of 250 m due to progressive uplift of the islands coeval with the lake stages. Cosmogenic 10Be- and 21Ne-derived exposure ages of the shorelines reveals that the hyperarid conditions in the Río Loa catchment were interspersed by several pluvial stages during the Pliocene and Pleistocene, which generated a large and persistent lake in the Quillagua-Llamara basin. The exposure ages of the final lake stage provide the maximum age for the incision of the Río Loa canyon (274 ± 74 ka) and the subsequent breaching of the Coastal Cordillera.
Identifier:10.1016/j.quageo.2017.11.002 (DOI)
Responsible Party
Creators:Benedikt Ritter (Author), Steven Binnie (Author), Finlay Stuart (Author), Volker Wennrich (Author), Tibor Dunai (Author)
Publisher:Elsevier Science, Amsterdam, The Netherlands
Publication Year:2019
CRC1211 Topic:Climate
Related Subproject:A2
Subject:Keyword: Cosmogenic Nuclides
File Details
Data Type:Text - Article
File Size:2.1 MB
Date:Available: 24.11.2017
Mime Type:application/pdf
Download Permission:Only Project Members
General Access and Use Conditions:According to the CRC1211DB data policy agreement.
Access Limitations:According to the CRC1211DB data policy agreement.
Specific Information - Publication
Publication Status:Accepted
Review Status:Peer reviewed
Publication Type:Article
Article Type:Journal
Source:Quaternary Geochronology
Number of Pages:12 (1 - 12)
Metadata Details
Metadata Creator:Benedikt Ritter
Metadata Created:19.06.2019
Metadata Last Updated:19.06.2019
Funding Phase:1
Metadata Language:English
Metadata Version:V50
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