DOI: 10.1016/j.quascirev.2017.03.007
Scopus记录号: 2-s2.0-85015292294
论文题名: Deglaciation in the central Pyrenees during the Pleistocene–Holocene transition: Timing and geomorphological significance
作者: Palacios D. ; García-Ruiz J.M. ; Andrés N. ; Schimmelpfennig I. ; Campos N. ; Léanni L. ; Aumaître G. ; Bourlès D.L. ; Keddadouche K.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 162 起始页码: 111
结束页码: 127
语种: 英语
英文关键词: Deglaciation
; Holocene
; In situ cosmogenic beryllium-10
; In situ cosmogenic chlorine-36
; Oldest Dryas
; Pyrenees
; Rock glacier
; Spain
; Surface exposure dating
; Younger Dryas
Scopus关键词: Cosmic rays
; Cosmology
; Isotopes
; Landforms
; Rocks
; Timing circuits
; Cosmogenic
; Deglaciations
; Holocenes
; Oldest Dryas
; Pyrenees
; Rock glaciers
; Spain
; Surface exposure dating
; Younger Dryas
; Ice
英文摘要: In this study, we document deglaciation in a sector of the southern–central Pyrenees (the Panticosa massif and the upper Gállego and Ossau valleys) using cosmic-ray exposure (CRE) dating methods, which were applied to samples from high altitude polished rock steps and rock glacier boulders. The obtained CRE dates show a coherent spatial distribution and confirm results previously obtained in this study area, thus demonstrating the reliability and robustness of the method. The results of analyses based on two distinct isotopes (10Be and 36Cl) are consistent, although the error is higher for results based on the 36Cl isotope. The study provides evidence for ice extent in the High Gállego Valley during the Oldest Dryas, with glacial advance until the bottom of the valleys, although the main glacier tongues remained disconnected from each other. During this period, the extent of glacier advance was directly related to the elevation of the associated summits. The Younger Dryas glaciers were constrained to cirques or very short ice tongues, and dating of the polished rock steps indicates that the ice masses were present until the first millennium of the Holocene. The Brazato rock glacier developed at the beginning of the Holocene and remained active until the Holocene Thermal Optimum, because of the protective effect of large masses of blocks and boulders. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59269
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Research Group of High Mountain Physical Geography, Departamento de Análisis Geográfico Regional y Geografía Física, Universidad Complutense de Madrid, Madrid, Spain; Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas (IPE-CSIC), Campus de Aula Dei, P.O. Box 13.034, Zaragoza, Spain; Aix-Marseille Univ., CNRS, IRD, Coll. France, UM 34 CEREGE, Technopôle de l'Environnement Arbois-Méditerranée, BP80, Aix-en-Provence, France
Recommended Citation:
Palacios D.,García-Ruiz J.M.,Andrés N.,et al. Deglaciation in the central Pyrenees during the Pleistocene–Holocene transition: Timing and geomorphological significance[J]. Quaternary Science Reviews,2017-01-01,162