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

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Citation
Ritter, B., 2017. Evidence for multiple Plio-Pleistocene lake episodes in the hyperarid Atacama Desert. Quaternary Geochronology, 1 - 12.
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Identification
Title(s):Main Title: Evidence for multiple Plio-Pleistocene lake episodes in the hyperarid Atacama Desert
Description(s):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.
Responsible Party
Creator(s):Author: Benedikt Ritter
Publisher:Elsevier Science, Amsterdam, The Netherlands
Topic
CRC1211 Topic:Climate
Related Sub-project(s):A2
Subject(s):CRC1211 Keywords: Cosmogenic Nuclides
File Details
File Name:Ritter_et_al_2018_Quat_Geochron.pdf
Data Type:Text
File Size:2132 kB (2.082 MB)
Date(s):Available: 2017-11-24
Mime Type:application/pdf
Language:English
Status:Completed
Constraints
Download Permission:OnlyCRC1211
General Access and Use Conditions:According to the CRC1211DB data policy agreement.
Access Limitations:According to the CRC1211DB data policy agreement.
Geographic
North:-no map data
East:-
South:-
West:-
Measurement Region:Central focus area
Measurement Location:--Central focus area--
Specific Informations - Publication
Status:Accepted
Review:PeerReview
Year:2017
Type:Article
Article Type:Journal
Source:Quaternary Geochronology
Page Range:1 - 12
Metadata Details
Metadata Creator:Benedikt Ritter
Metadata Created:2019-06-19
Metadata Last Updated:2019-06-19
Subproject:A2
Funding Phase:1
Metadata Language:English
Metadata Version:V42
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