globalchange  > 过去全球变化的重建
DOI: 10.1016/j.geomorph.2019.02.004
WOS记录号: WOS:000465062900004
论文题名:
Discovery and dating of Pre-LGM deposits in a high catchment of the Dolomites (Italy): New insights on climate-related geomorphological processes during the Late Pleistocene
作者: Vandelli, Vittoria1; Ghinoi, Alessandro1; Marchetti, Mauro2; Soldati, Mauro1
通讯作者: Vandelli, Vittoria
刊名: GEOMORPHOLOGY
ISSN: 0169-555X
EISSN: 1872-695X
出版年: 2019
卷: 332, 页码:22-32
语种: 英语
英文关键词: High mountain geomorphology ; Climate change ; Radiocarbon dating ; MIS 3 ; Dolomites
WOS关键词: ROCK AVALANCHES ; EASTERN ALPS ; SEA LEVELS ; RECORD ; GREENLAND ; GLACIERS ; LANDSLIDES ; LANDSCAPE ; HIMALAYA ; FRANCE
WOS学科分类: Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向: Physical Geography ; Geology
英文摘要:

The results from the analysis of a relatively deep stratigraphic sequence from a formerly glaciated plateau in the Upper Badia valley (Dolomites, Italy) are discussed, and the first insight on Late Pleistocene sedimentary records and geomorphological evolution of the area are provided. The investigated sequence comprises: i) cohesive sediments interpreted as colluvial-eluvial in origin or as stagnant water deposits; ii) sandy diamicton and dolostone monolithic sediments interpreted as gravity-induced deposits, possibly owing to debris flows or wash out/reworking of rock avalanche deposits from the surrounding dolomite ridges; iii) silty diamicton interpreted as lodgement till, possibly attributed to the Last Glacial Maximum (LGM). Radiocarbon dating results and interpretation of stratigraphic data, supported by geomorphological field surveys, remote sensing data analyses and palaeo-climatic and palaeo-environmental data from literature, enabled us to conclude that the investigated plateau (Pralongia, ca. 2000 m a.s.l.) was likely ice-free for most of Marine Isotope Stage 3. In particular, between 38 ka BP and the inset of full-glacial conditions (LGM similar to 27 ka BP) clastic gravity-induced sediments were deposited within the study site. Supraglacial transport is supposed to have played a role in the emplacement of gravity-induced deposits from the surrounding dolomite cliffs to the plateau. This study resulted in the first Pre-LGM record of sedimentation and palaeo-environmental conditions inside the Eastern Dolomites in the 46 to 38 ka BP period. (C) 2019 Elsevier B.V. All fights reserved.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/137741
Appears in Collections:过去全球变化的重建

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作者单位: 1.Univ Modena & Reggio Emilia, Dipartimento Sci Chim & Geol, Via Campi 103, I-41125 Modena, Italy
2.Univ Modena & Reggio Emilia, Dipartimento Educ & Sci Umane, Viale Allegri 9, I-42121 Reggio Emilia, Italy

Recommended Citation:
Vandelli, Vittoria,Ghinoi, Alessandro,Marchetti, Mauro,et al. Discovery and dating of Pre-LGM deposits in a high catchment of the Dolomites (Italy): New insights on climate-related geomorphological processes during the Late Pleistocene[J]. GEOMORPHOLOGY,2019-01-01,332:22-32
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