Papers by Jean-Pierre Suc
Modern pollen deposition in the Rhone delta area (Lagoonal and marine sediments), France
Grana, 1997
ABSTRACT
La Crise messinienne debuta il y a 5,971 Millions d’annees (Ma) pour s’achever 500 000 ans plus t... more La Crise messinienne debuta il y a 5,971 Millions d’annees (Ma) pour s’achever 500 000 ans plus tard. L’eau, qu’elle soit salee, saumâtre ou douce, y a tenu un role determinant. La fin de crise s’est soldee par un deluge d’une violence inouie tirant sa source dans l’ampleur meme de la crise, a savoir l’evaporation quasi-totale de la Mer Mediterranee. Depuis 14 Ma, la Mediterranee est un appendice de l’Ocean Atlantique. La tectonique a ferme successivement trois corridors pour n’en laisser qu’un seul au sud du Rif (figure 1a-b). Les stades de la Crise messinienne sont bien dates par les microfossiles marins, le paleomagnetisme, la cyclostratigraphie.
Earth and Planetary Science Letters, 2009
Though the late Miocene "Messinian Salinity Crisis" has been intensely researched along the circu... more Though the late Miocene "Messinian Salinity Crisis" has been intensely researched along the circum-Mediterranean basins, few studies have focused on the central part of the Mediterranean Basin and, especially, the pre-salt deposits. To improve our knowledge of the Messinian events, it is imperative to better understand this domain. In this study, we provide a more complete understanding of this central domain in the Provence Basin. We were able to recognize: a) thick marine detrital series (up to 1000 m) derived from the Messinian subaerial erosion which is partly prolongated in the distal part by b) a thick unit of deep marine deposits (up to 800 m) prior to the evaporites; c) a thick presumed alternation of detritals and evaporites (1500 m) below the mobile halite; and d) a two-step transgression at the end of the Messinian. Spatially, we document the eroded shelf to the deep basin (and from the western to the eastern parts of the Gulf of Lions), and temporally, we extend the interpretations from the early deposition of detritic sediments to the final sea-level rise. The results provide a new basis for discussion not only for the development of the Messinian Salinity Crisis but also for the reconstruction of the subsidence history of the Provence Basin.
Pollen profile VACC3, Vaccarès, France
Palaeogeography, Palaeoclimatology, Palaeoecology, 2012
Northern Hemisphere vegetation is generally zoned as a consequence of latitudinal and altitudinal... more Northern Hemisphere vegetation is generally zoned as a consequence of latitudinal and altitudinal gradients. Temperature reconstruction from three successive pollen floral assemblages (of Tortonian, Messinian and Zanclean age) from the eastern Pyrenees has been used to estimate the altitudinal evolution of the uplifted Cerdanya Basin and its surrounding massifs. A new method has been developed for the uplifted basins, which completes that already applied to pollen floras from coastal marine deposits close to mountains. In contrast to previous hypotheses, it seems that the eastern Pyrenees occurred at a lower altitude in the Late Miocene before continuous uplift began 10 Ma ago. The rate of this uplift ranged between 0.06 and 0.12 mm/yr.
Deep-Time Perspectives on Climate Change: Marrying the Signal from Computer Models and Biological Proxies
In Europe and the Mediterranean region, the vegetation and climate of the Neogene is well underst... more In Europe and the Mediterranean region, the vegetation and climate of the Neogene is well understood, due to the abundance of pollen data, allowing the climate evolution at a time of global cooling to be described. This paper presents a climatic reconstruction of four key timeslices of the Neogene: the Mid-Miocene (c. 14 Ma), the Late Miocene (c. 10 Ma), the Early Pliocene (c. 5-5.3 Ma) and the Mid-Pliocene (c. 3.6 Ma). The results show that Neogene climate was warmer than today and that the transition from a weak latitudinal thermic gradient (around 0.48 8C/degree in latitude) to a gradient similar to that of today (0.6 8C/degree in latitude) took place at the end of the Miocene. The latitudinal precipitation gradient was more accentuated than today from the Mid-Miocene to the Mid-Pliocene, with higher precipitation than today in northwestern Europe and the northwestern Mediterranean but with conditions that were drier than or equivalent to today in the southwestern Mediterranean region.
Bulletin de la Société Géologique de France
Correlation of messinian carbonate platforms
Géologie Méditerranéenne
Basin Research
Basin-wide correlation of Messinian units and Plio-Quaternary chronostratigraphic markers (5.3 Ma... more Basin-wide correlation of Messinian units and Plio-Quaternary chronostratigraphic markers (5.3 Ma, 2.6 Ma, 0.9 Ma and 0.45 Ma), the mapping of total sediment thickness, and the determination of overall sedimentary volumes enabled us to provide a high resolution quantitative history of sediment volumes for the last 6 Ma along the Gulf of Lions margin. The results point to (i) a dramatic increase in terrigenous sediment input during the Messinian Salinity Crisis. This increased sedimentation reflects enhanced regional fluvial erosion related to the dramatic fall of Mediterranean base-level. Stronger weathering due to a regional wetter climate probably also increased erosional fluxes. (ii) A sediment input three times higher during the Plio-Quaternary compared to the Miocene seems in agreement with published measurements from World's ocean. However, the timing of this increase being uncertain, it implies that the trigger(s) also remain(s) uncertain. (iii) A decrease of detrital volume around 2.6 Ma is attributed to a regional change in the drainage pattern of rivers in the northwestern Alps. (iv) This study also highlights the Mid-Pleistocene Revolution around 0.9 Ma, which resulted in an almost doubling of sediment input in the Provencal Basin.
Pr�sence d'un faci�s fluvio-marin dans les marnes � micromammif�res de Celleneuve (H�rault)
Quaternaire, 1971
Présence de pollen de Microtropis fallax (Celastraceae) dans le Pleistocène inférieur Celleneuve (Hérault)
ABSTRACT
Quelques taxons-guides dans l'étude paléoclimatique du Pliocène et du Pléistocène inférieur du Languedoc (France)
Revue de Micropaléontologie
ABSTRACT
Climats DU Languedoc, DU Roussillon (sud de la France) et de la Catalogne Nord-Est de L'espagne) dans le Cadre Chronologique DU PLIOCÈNE et DU PLÉISTOCÈNE INFÉRIEUR D'APRÈS L'analyse Pollinique
Palynostratigraphie et paléoclimatologie du Pliocène et du Pléistocène inférieur en Méditerranée nord-occidentale
Comptes Rendus de l Académie des Sciences - Series IIC - Chemistry
ABSTRACT
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Papers by Jean-Pierre Suc