Paléoenvironment durant le Pleistocene Supérieur en Vaucluse: analyse palynologique des couches inférieures de l´abri de la Combette (Bonnieux, Vaucluse, France)

López‐Sáez, José Antonio; Texier, Pierre Jean; Thi, Bui

doi:10.3989/tp.1998.v55.i2.308

Cited by 5 publications

(6 citation statements)

References 3 publications

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“…Polygonal wedge networks caused by ground thermal contraction and filled with windblown sand (sand wedges) were also described (Bouteyre and Allemann, 1964;Gabert-Delay, 1967;Cailleux and Rousset, 1968;Nury and Roux, 1969;Arnal, 1971aArnal, , 1971b. Windblown sand also contributed to the infilling of karst cavities (Brochier and Livache, 1978;Debard, 1987Debard, , 1988Lopez Saez and Texier, 1998;Texier et al, 2003;Saos et al, 2014;Puaud et al, 2015). The main conclusions that can be drawn from these works are as follows:…”

Section: Regional Setting 21 Geological and Geomorphological Settingmentioning

confidence: 90%

Last Glacial aeolian landforms and deposits in the Rhône Valley (SE France): Spatial distribution and grain-size characterization

et al. 2018

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In the Rhône Valley, a north-south oriented Cenozoic rift in southeast France, thick Pleistocene loess deposits have been recognized since the beginning of the last century. These loess records, which are disconnected from the North European Loess Belt (NELB), are of significant interest to document the evolution of perimediterranean landscapes and environments during the Last Glacial. To overcome the poor precision of available aeolian distribution maps, aeolian deposits were mapped using the topsoil textural database provided by the Land Use and Cover Area frame Statistical Survey project (LUCAS). The grain-size distribution of aeolian sand and loess was first determined using 116 samples taken from surveyed outcrops. Then, the areas showing a similar grain-size composition were extracted from the LUCAS rasters. The resulting map reproduces the conventional maps correctly but suggests a more significant extension of loess, in better agreement with the known distribution of outcrops. The map shows that the distinctive morphology of the valley dominantly controls the distribution of aeolian deposits. The deflation-related landforms, i.e., yardangs, closed depressions (pans), and desert pavements, are widespread south of narrowings of the Rhône Valley between latitudes 44°N and 45°N. They indicate palaeowinds blowing from the north/northwest. Aeolian sand, loessic sand, sandy loess, and loess deposits successively spread on both sides of the Rhône River. The loess is characterized by a coarse texture (main mode around 60 μm), strong local thickness (N5 m), limited extension, and abundant bioturbation. This preservation results from the persistence of a shrub vegetal cover during the coldest and driest phases of the Last Glacial that allowed for trapping the saltating and suspended particles close to the alluvial sources.

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Section: Regional Setting 21 Geological and Geomorphological Settingmentioning

confidence: 90%

Last Glacial aeolian landforms and deposits in the Rhône Valley (SE France): Spatial distribution and grain-size characterization

et al. 2018

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“…This interval, may or may not render the exact Mousterian occupation period. In the absence of other datable assemblages, the data do not exclude the possibility that the site was used before the MIS 5a, although that appears to be an unlikely scenario (see also data in López-Sáez et al 1998). Chronostratigraphic, sedimentological and palaeoclimatological comparisons to local-to-regional sedimentary archives proposed by Mologni et al (in press) suggests a slightly earlier infilling of the rock-shelter during MIS 5b/5a.…”

mentioning

confidence: 78%

“…Secondary loess ("loess-like" sediments) dominates the upper series, encompassing the layers: 3) D; 4) B/C; and 5) A, on top of the "Mousterian living floor" (Texier et al 2003: 81). The palynological study by López-Sáez et al (1998), below level F/G, revealed three palynological phases matching Würm glaciation (MIS 5d to MIS 2; cf. Ehlers et al 2011) Mologni (2017) and Mologni et al (in press) added a sedimentological and micromorphological study to understand better the sedimentary formation processes of the sequence and the related environmental conditions.…”

Section: In Conjunction Withmentioning

confidence: 99%

The Mousterian loess sequence La Combette (France) and its chronological framework: A re-investigation

Kreutzer¹,

Valladas²,

Texier³

et al. 2021

Comptes Rendus Palevol

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The La Combette rock-shelter, located in the Luberon mountains (Southern France), is an essential local archaeological discovery. The site comprises several Palaeolithic layers suggesting multiple phases of Mousterian occupation. The sediment sequence of c. 7 m thickness indicates rapid changes in the environmental conditions, which led to an abandonment of the site. While the first chronological studies were carried out in the late 1990s, in 2014, new sediment samples were taken for state-of-the-art luminescence-dating analyses using fine grain (4-11 µm) quartz and polymineral separates. Samples were taken from the loess-dominated upper archaeological levels A to D (upper main unit) as well as from the anthropogenic layer E, embedded in a fluvial context, and from the bottom deposits of the layer F/G. Here we present the obtained chronological dataset in conjunction with 24 so far unpublished thermoluminescence dating results from burnt flint artefacts from layers E and F/G. We combine and discuss our results against previous chronological datasets, which seem to be broadly confirmed by our new findings framing the sedimentation history of La Combette at 78.3 ka to 39.4 ka. In summary, it appears that the local environmental conditions were deeply impacted by the climatic changes during MIS 4/3. This caused rapid sediment influx that finally rendered the rock shelter uninhabitable as a potential refuge, until its re-discovery in the second half of the 20th century.

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“…Il est également fréquent de rencontrer au niveau des gorges, combes et cluses les plus encaissées, des baumes ou « abris sous roche », formes d'érosion témoignant de la vigueur des processus périglaciaires pléistocènes. (Cattani & Renault-Miskovsky, 1989 ;Magnin, 1991 ;López-Sáez et al, 1998 ;Théry, 1998), ces valeurs ne sont pas considérablement éloignées de celles obtenues en rhexistasie sur des lithologies marno-calcaires et topographies voisines du Luberon (Delannoy & Rovéra, 1996 ;Hallet et al, 1996 ;Lecompte et al, 1998 ;Rovéra et al, 1999). Ces vitesses d'érosion, sans être exceptionnelles, sont aussi très comparables à celles obtenues en basse Provence sur de plus longues durées, dans des travaux intégrant également l'évolution de la tectonique active (Siame et al, 2004 ;Molliex et al, 2013).…”

Section: -Les Formes Et Formations Pléisto-cènes Du Grand Luberonunclassified

Regards sur les dynamiques paysagères du Pléistocène Supérieur du Luberon et de Basse Provence (SIM 3 et SIM 2, France)

Ollivier¹,

Magnin²,

Guendon³

et al. 2014

quaternaire

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Paléoenvironment durant le Pleistocene Supérieur en Vaucluse: analyse palynologique des couches inférieures de l´abri de la Combette (Bonnieux, Vaucluse, France)

Cited by 5 publications

References 3 publications

Last Glacial aeolian landforms and deposits in the Rhône Valley (SE France): Spatial distribution and grain-size characterization

Last Glacial aeolian landforms and deposits in the Rhône Valley (SE France): Spatial distribution and grain-size characterization

The Mousterian loess sequence La Combette (France) and its chronological framework: A re-investigation

Regards sur les dynamiques paysagères du Pléistocène Supérieur du Luberon et de Basse Provence (SIM 3 et SIM 2, France)

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