Universität zu Köln

Ritter, Benedikt, Binnie, Steven A., Stuart, Finlay M., Wennrich, Volker ORCID: 0000-0003-3617-1963 and Dunai, Tibor J. (2018). Evidence for multiple Plio-Pleistocene lake episodes in the hyperarid Atacama Desert. Quat. Geochronol., 44. S. 1 - 13. OXFORD: ELSEVIER SCI LTD. ISSN 1878-0350

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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 Rio 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 Be-10-and Ne-21-derived exposure ages of the shorelines reveals that the hyperarid conditions in the Rio 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 Rfo Loa canyon (274 +/- 74 ka) and the subsequent breaching of the Coastal Cordillera.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Ritter, Benedikt UNSPECIFIED UNSPECIFIED UNSPECIFIED Binnie, Steven A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Stuart, Finlay M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wennrich, Volker UNSPECIFIED orcid.org/0000-0003-3617-1963 UNSPECIFIED Dunai, Tibor J. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-194331
DOI:	10.1016/j.quageo.2017.11.002
Journal or Publication Title:	Quat. Geochronol.
Volume:	44
Page Range:	S. 1 - 13
Date:	2018
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	1878-0350
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PRODUCTION-RATE CALIBRATION; CHILEAN FORE-ARC; NORTHERN CHILE; CENTRAL ANDES; LANDSCAPE EVOLUTION; TROPICAL PACIFIC; COSMOGENIC NE-21; CLIMATE-CHANGE; CALAMA BASIN; MIOCENE AGE Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/19433