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  • NEANIAS Atmospheric Research Community
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Yahyaoui, Zouhour; Sabatier, François; Rebai, Noamen; Abdeljaouad, Sâadi;

    Conference: 1st International Conference on Mapping and Spatial Analysis of Socio-Economic and Environmental Indicators for the Local and Regional Sustainable Development (SEE GEOMATICS)Location: Tataouine, TUNISIADate: MAR 25-26, 2015; International audience; For mapping the three-dimensional shape of the submarine bars, studying their dynamics and assessing the spatiotemporal evolution of sedimentary balances, the coastal prism of Korba (emerged and submerged beach) has benefitted from topo-bathymetric monitoring. This monitoring was carried out on an annual basis between July 2006 and July 2009. Numerical Terrain Models (N.T.M.) and transverse profiles were then analyzed. The main results show, firstly, that the shoreface of Korba is characterized by a homogeneous evolution across all profiles of its two-bar system. Moreover, the extent of changes in the sand volume of the beach suggests that the evolution takes place without significant sedimentary loss and that the beach is in a dynamic equilibrium. Accretion of the bars and migration towards the shore are found in periods of small waves (between July 2006 and July 2007). However, following a period of minor agitations, a filling of the outer trough is observed. It is proceeded by the migration of the outer bar towards the coast (between July 2007 and July 2009). These results confirm the traditional model of self-organization of a barred beach. These data and results, then, allow us to establish conceptual models and simulations of the evolution of the microtidal, barred beach of Korba.

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao https://doi.org/10.1...arrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    https://doi.org/10.1007/978-3-...
    Part of book or chapter of book . 2019 . Peer-reviewed
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao https://doi.org/10.1...arrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      https://doi.org/10.1007/978-3-...
      Part of book or chapter of book . 2019 . Peer-reviewed
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Damase Mouralis; Erkan Aydar; Ahmet Türkecan; Catherine Kuzucuoğlu;

    The southern Cappadocia shows a large variety of Quaternary volcanic landscapes, offering the opportunity to observe beautiful and generally fresh morphologies. These landscapes include two rhyolitic complexes (Golludag and Acigol), a huge composite volcano (Hasandag) and numerous monogenic vents, with scoria cones, domes and maars. Natural and anthropogenic sections show a large variety of lava flows and tephra layers. The precise study of this volcanic material allows reconstructing the volcanic and geomorphologic evolution of this area during the Quaternary, including modes of emplacements, chronology of the volcanic successions, morphological impacts on the landscapes. In addition, archaeological excavations in southern Cappadocia testify for the presence of ancient populations since the Middle to Upper Palaeolithic. During the Neolithic and Chalcolithic periods, the southern Cappadocia has been intensively occupied with permanent sites (Asikli Hoyuk, Musular, Tepecik Ciftlik, Kosk Hoyuk, etc.) as well as non-permanent sites devoted to mining and chopping of obsidian associated with some of the volcanoes.

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao https://doi.org/10.1...arrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    https://doi.org/10.1007/978-3-...
    Part of book or chapter of book . 2019 . Peer-reviewed
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Khuntia, J; Proust, Sébastien; Khatua, K;

    International audience; We report here a laboratory study on the effects of bed roughness and emergent rigid veg-etation on the unsteady flows associated with flash floods and extreme flood events. The flow structure of unsteady open-channel flows over rough bed with and without emergent rigid vegetation has been investigated in an 18m long and 3m wide laboratory flume. Steady uniform flows were also studied and served as reference flows. For both steady and unsteady flows, two geometries are tested: (1) uniform bed roughness (uniform dense synthetic grass modelling meadow) along the flume and (2) a uniform staggered distribu-tion of emergent wooden circular cylinders (model of rigid vegetation) set on the bed roughness. Transient flow depths are simultaneously measured at six longitudinal positions using ultra-sonic sensors. Transient velocities are measured at one longitudinal position over the water column using a side looking ADV probe to estimate depth-averaged veloci-ty. In order to compute ensemble averages of the flow parameters, 109 runs of the same hydrograph are carried out repeatedly at the flume entrance. Two consecutive runs are separated by a base flow. The ensemble averages of the measured discharge, flow depths and velocity are found to be converged after 72 runs. For the two geometries: at the peak flow of the hydrograph, the vertical profiles of mean streamwise velocity and horizontal Reynolds shear stress are comparable to the profiles obtained for steady uniform cases of same flow depth; and accelerated and decelerated velocity profiles are obtained during the rising limb and falling limb of the hydrograph, respectively. Reynolds shear stresses are also found to be higher during the rising limb than during the falling limb for a fixed flow depth. The hysteresis in the depth-averaged velocity / flow depth relationships is compa-rable in shape and size for the two geometries highlighting the weak effect of the rigid vegetation compared to the effects of un-stationarity.

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    Hyper Article en Ligne
    Other literature type . 2020
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    https://hal.archives-ouvertes....
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    https://doi.org/10.1201/b22619...
    Part of book or chapter of book . 2020 . Peer-reviewed
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Hyper Article en Lig...arrow_drop_down
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      Hyper Article en Ligne
      Other literature type . 2020
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      https://doi.org/10.1201/b22619...
      Part of book or chapter of book . 2020 . Peer-reviewed
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  • Authors: Deng, D.; Nguyen Minh, D.; Constantinescu, A.;

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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Lasue, J.; Clifford, S.M.; Conway, Susan J.; Mangold, N.; +1 Authors

    Abstract Water is one of the most common and important volatiles found throughout the Solar System, influencing both the geological evolution of planetary bodies and their potential habitability. The evidence for past and present water on Mars has been a main driver of its exploration. Ancient fluvial landforms indicate that Mars once had surficial conditions suitable for the presence of persistent liquid water on its surface. However, climate models of early Mars remain notably difficult to reconcile with these observations. The global inventory of water on Mars is critical to understanding how the planet's potential habitability has varied over time. In this chapter, we review these topics, including the inventory of water, its various reservoirs, and potential loss mechanisms, and discuss how the planet’s hydrosphere evolved with time.

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao https://doi.org/10.1...arrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    https://doi.org/10.1016/b978-0...
    Part of book or chapter of book . 2019 . Peer-reviewed
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao https://doi.org/10.1...arrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      https://doi.org/10.1016/b978-0...
      Part of book or chapter of book . 2019 . Peer-reviewed
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Benmoussa, T.; Amrouni, O.; Dezileau, L.; Mahé, Gil; +2 Authors

    The geochemical and grain size analysis were carried out on surface and down core sediments from the present-day alluvial-coastal plain of the Medjerda River, Gulf of Tunis, Tunisia. The aim of this paper is to characterize the geochemical and grain size distribution of sediments and its relationship with the hydrodynamics extreme events occurring during the last century. Using a multi proxy approach, six turbidities layers have been identified in down core sediment (i.e. TL-1, TL-2, TL-3, TL-4, TL-5, TL-6, TL-7 and TL-8) characterized by multimodal grain size distribution. The terrestrial sediment which feeds the northern coastal of the Gulf of Tunis is characterized by very fine-grained sediment (clay and silt). The geochemical signature shows a highly concentration of Rb, Ti, Zn and Pb. The Medjerda River is the mainly source of silts and clay sediment. Besides, the mining pollution (Zn and Pb) is relatively strong in the coastal area, especially during the great floods events of Medjerda watershed recorded in the 1953; 1957; 1969 and 1973. Even during high frequency events, the sediments are devoid of any coarse fraction.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ https://hal.umontpel...arrow_drop_down
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    https://hal.umontpellier.fr/ha...
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    Horizon / Pleins textes
    Other literature type . 2019
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    https://doi.org/10.1007/978-3-...
    Part of book or chapter of book . 2019 . Peer-reviewed
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ https://hal.umontpel...arrow_drop_down
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      Horizon / Pleins textes
      Other literature type . 2019
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      https://doi.org/10.1007/978-3-...
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  • Authors: Constantinescu, A.; Nguyen Minh, D.; Deng, D.;

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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Mercier, Denis;

    International audience

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    https://doi.org/10.1002/978111...
    Other literature type . 2021
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    Authors: Alfredo Loi; Fabrizio Cocco; Giacomo Oggiano; Antonio Funedda; +7 Authors

    Abstract This review illustrates the most important features of the Ordovician successions of the Sardinian basement. We focus on the stratigraphy and tectonic structures in the tectonic units of the External and Nappe zones of the Variscan basement. The Ordovician successions are characterized by unconformities related to tectonic events ascribed to the Sardic and Sarrabese phases. The different durations of the unconformity-related gaps in the External (17 myr) and Nappe (6 myr) zones, recent work on the trilobite fossil content, and the occurrence of a volcanic arc only in the Nappe Zone (Sarrabus and Gerrei units) highlight significant discrepancies suggesting that these domains did not share the same geodynamic setting and palaeogeographical position during the Ordovician. This implies they were amalgamated only in Variscan times. Whereas for the external and nappe zones the Ordovician features are clear, the high-grade metamorphic Inner Zone, where numerous Ordovician ortho- and para-gneiss occur, more detailed studies are needed to define a complete framework for the Ordovician evolution of Sardinia. The present revision of data for the best-preserved succession of Sardinian tectonic units suggests that at least two distinct terranes, which did not share the same Ordovician evolution, were only amalgamated during the Variscan Orogeny.

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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ ArchiMer - Instituti...arrow_drop_down
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Bouroubi-Ouadfel, Yasmina; Khiari, Abdelkader; Le Gal La Salle, Corinne; Djebbar, Mounira; +1 Authors

    Northeastern Algeria has been known, since ancient times, by the presence of thermo-mineral springs emerging from different geological formations, especially in the vicinity of the Tunisian borderline. These hot waters circulate along the fractured system and the main thermal spring emerges from a Neogene graben. Each of the four inventoried hot springs has at least three griffins. These thermal waters are found to be saline and carbo-gaseous. The geochemical facies are of the Cl–HCO3–Na type. Stable isotopes contents (δ2H, δ18O) showed that the waters are of meteoric origin. Strontium isotopic ratios 87Sr/86Sr indicated the presence of a mixture of thermal fluids with infiltrated meteoric waters at shallow depths as well as strong water-rock interactions. The combined use of geochemical and isotopic tracers highlights the existence of a hydrothermal alteration and a saline fluid circulation.

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    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    https://doi.org/10.1007/978-3-...
    Part of book or chapter of book . 2019 . Peer-reviewed
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Yahyaoui, Zouhour; Sabatier, François; Rebai, Noamen; Abdeljaouad, Sâadi;

    Conference: 1st International Conference on Mapping and Spatial Analysis of Socio-Economic and Environmental Indicators for the Local and Regional Sustainable Development (SEE GEOMATICS)Location: Tataouine, TUNISIADate: MAR 25-26, 2015; International audience; For mapping the three-dimensional shape of the submarine bars, studying their dynamics and assessing the spatiotemporal evolution of sedimentary balances, the coastal prism of Korba (emerged and submerged beach) has benefitted from topo-bathymetric monitoring. This monitoring was carried out on an annual basis between July 2006 and July 2009. Numerical Terrain Models (N.T.M.) and transverse profiles were then analyzed. The main results show, firstly, that the shoreface of Korba is characterized by a homogeneous evolution across all profiles of its two-bar system. Moreover, the extent of changes in the sand volume of the beach suggests that the evolution takes place without significant sedimentary loss and that the beach is in a dynamic equilibrium. Accretion of the bars and migration towards the shore are found in periods of small waves (between July 2006 and July 2007). However, following a period of minor agitations, a filling of the outer trough is observed. It is proceeded by the migration of the outer bar towards the coast (between July 2007 and July 2009). These results confirm the traditional model of self-organization of a barred beach. These data and results, then, allow us to establish conceptual models and simulations of the evolution of the microtidal, barred beach of Korba.

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    https://doi.org/10.1007/978-3-...
    Part of book or chapter of book . 2019 . Peer-reviewed
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao https://doi.org/10.1...arrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      https://doi.org/10.1007/978-3-...
      Part of book or chapter of book . 2019 . Peer-reviewed
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Damase Mouralis; Erkan Aydar; Ahmet Türkecan; Catherine Kuzucuoğlu;

    The southern Cappadocia shows a large variety of Quaternary volcanic landscapes, offering the opportunity to observe beautiful and generally fresh morphologies. These landscapes include two rhyolitic complexes (Golludag and Acigol), a huge composite volcano (Hasandag) and numerous monogenic vents, with scoria cones, domes and maars. Natural and anthropogenic sections show a large variety of lava flows and tephra layers. The precise study of this volcanic material allows reconstructing the volcanic and geomorphologic evolution of this area during the Quaternary, including modes of emplacements, chronology of the volcanic successions, morphological impacts on the landscapes. In addition, archaeological excavations in southern Cappadocia testify for the presence of ancient populations since the Middle to Upper Palaeolithic. During the Neolithic and Chalcolithic periods, the southern Cappadocia has been intensively occupied with permanent sites (Asikli Hoyuk, Musular, Tepecik Ciftlik, Kosk Hoyuk, etc.) as well as non-permanent sites devoted to mining and chopping of obsidian associated with some of the volcanoes.

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    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    https://doi.org/10.1007/978-3-...
    Part of book or chapter of book . 2019 . Peer-reviewed
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    Authors: Khuntia, J; Proust, Sébastien; Khatua, K;

    International audience; We report here a laboratory study on the effects of bed roughness and emergent rigid veg-etation on the unsteady flows associated with flash floods and extreme flood events. The flow structure of unsteady open-channel flows over rough bed with and without emergent rigid vegetation has been investigated in an 18m long and 3m wide laboratory flume. Steady uniform flows were also studied and served as reference flows. For both steady and unsteady flows, two geometries are tested: (1) uniform bed roughness (uniform dense synthetic grass modelling meadow) along the flume and (2) a uniform staggered distribu-tion of emergent wooden circular cylinders (model of rigid vegetation) set on the bed roughness. Transient flow depths are simultaneously measured at six longitudinal positions using ultra-sonic sensors. Transient velocities are measured at one longitudinal position over the water column using a side looking ADV probe to estimate depth-averaged veloci-ty. In order to compute ensemble averages of the flow parameters, 109 runs of the same hydrograph are carried out repeatedly at the flume entrance. Two consecutive runs are separated by a base flow. The ensemble averages of the measured discharge, flow depths and velocity are found to be converged after 72 runs. For the two geometries: at the peak flow of the hydrograph, the vertical profiles of mean streamwise velocity and horizontal Reynolds shear stress are comparable to the profiles obtained for steady uniform cases of same flow depth; and accelerated and decelerated velocity profiles are obtained during the rising limb and falling limb of the hydrograph, respectively. Reynolds shear stresses are also found to be higher during the rising limb than during the falling limb for a fixed flow depth. The hysteresis in the depth-averaged velocity / flow depth relationships is compa-rable in shape and size for the two geometries highlighting the weak effect of the rigid vegetation compared to the effects of un-stationarity.

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    Hyper Article en Ligne
    Other literature type . 2020
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    https://hal.archives-ouvertes....
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    https://doi.org/10.1201/b22619...
    Part of book or chapter of book . 2020 . Peer-reviewed
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      Other literature type . 2020
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      https://doi.org/10.1201/b22619...
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  • Authors: Deng, D.; Nguyen Minh, D.; Constantinescu, A.;

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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Lasue, J.; Clifford, S.M.; Conway, Susan J.; Mangold, N.; +1 Authors

    Abstract Water is one of the most common and important volatiles found throughout the Solar System, influencing both the geological evolution of planetary bodies and their potential habitability. The evidence for past and present water on Mars has been a main driver of its exploration. Ancient fluvial landforms indicate that Mars once had surficial conditions suitable for the presence of persistent liquid water on its surface. However, climate models of early Mars remain notably difficult to reconcile with these observations. The global inventory of water on Mars is critical to understanding how the planet's potential habitability has varied over time. In this chapter, we review these topics, including the inventory of water, its various reservoirs, and potential loss mechanisms, and discuss how the planet’s hydrosphere evolved with time.

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    https://doi.org/10.1016/b978-0...
    Part of book or chapter of book . 2019 . Peer-reviewed
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao https://doi.org/10.1...arrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      https://doi.org/10.1016/b978-0...
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    Authors: Benmoussa, T.; Amrouni, O.; Dezileau, L.; Mahé, Gil; +2 Authors

    The geochemical and grain size analysis were carried out on surface and down core sediments from the present-day alluvial-coastal plain of the Medjerda River, Gulf of Tunis, Tunisia. The aim of this paper is to characterize the geochemical and grain size distribution of sediments and its relationship with the hydrodynamics extreme events occurring during the last century. Using a multi proxy approach, six turbidities layers have been identified in down core sediment (i.e. TL-1, TL-2, TL-3, TL-4, TL-5, TL-6, TL-7 and TL-8) characterized by multimodal grain size distribution. The terrestrial sediment which feeds the northern coastal of the Gulf of Tunis is characterized by very fine-grained sediment (clay and silt). The geochemical signature shows a highly concentration of Rb, Ti, Zn and Pb. The Medjerda River is the mainly source of silts and clay sediment. Besides, the mining pollution (Zn and Pb) is relatively strong in the coastal area, especially during the great floods events of Medjerda watershed recorded in the 1953; 1957; 1969 and 1973. Even during high frequency events, the sediments are devoid of any coarse fraction.

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    https://hal.umontpellier.fr/ha...
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    Horizon / Pleins textes
    Other literature type . 2019
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    https://doi.org/10.1007/978-3-...
    Part of book or chapter of book . 2019 . Peer-reviewed
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      Horizon / Pleins textes
      Other literature type . 2019
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      https://doi.org/10.1007/978-3-...
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  • Authors: Constantinescu, A.; Nguyen Minh, D.; Deng, D.;

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    Authors: Mercier, Denis;

    International audience

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    https://doi.org/10.1002/978111...
    Other literature type . 2021
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    Authors: Alfredo Loi; Fabrizio Cocco; Giacomo Oggiano; Antonio Funedda; +7 Authors

    Abstract This review illustrates the most important features of the Ordovician successions of the Sardinian basement. We focus on the stratigraphy and tectonic structures in the tectonic units of the External and Nappe zones of the Variscan basement. The Ordovician successions are characterized by unconformities related to tectonic events ascribed to the Sardic and Sarrabese phases. The different durations of the unconformity-related gaps in the External (17 myr) and Nappe (6 myr) zones, recent work on the trilobite fossil content, and the occurrence of a volcanic arc only in the Nappe Zone (Sarrabus and Gerrei units) highlight significant discrepancies suggesting that these domains did not share the same geodynamic setting and palaeogeographical position during the Ordovician. This implies they were amalgamated only in Variscan times. Whereas for the external and nappe zones the Ordovician features are clear, the high-grade metamorphic Inner Zone, where numerous Ordovician ortho- and para-gneiss occur, more detailed studies are needed to define a complete framework for the Ordovician evolution of Sardinia. The present revision of data for the best-preserved succession of Sardinian tectonic units suggests that at least two distinct terranes, which did not share the same Ordovician evolution, were only amalgamated during the Variscan Orogeny.

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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Bouroubi-Ouadfel, Yasmina; Khiari, Abdelkader; Le Gal La Salle, Corinne; Djebbar, Mounira; +1 Authors

    Northeastern Algeria has been known, since ancient times, by the presence of thermo-mineral springs emerging from different geological formations, especially in the vicinity of the Tunisian borderline. These hot waters circulate along the fractured system and the main thermal spring emerges from a Neogene graben. Each of the four inventoried hot springs has at least three griffins. These thermal waters are found to be saline and carbo-gaseous. The geochemical facies are of the Cl–HCO3–Na type. Stable isotopes contents (δ2H, δ18O) showed that the waters are of meteoric origin. Strontium isotopic ratios 87Sr/86Sr indicated the presence of a mixture of thermal fluids with infiltrated meteoric waters at shallow depths as well as strong water-rock interactions. The combined use of geochemical and isotopic tracers highlights the existence of a hydrothermal alteration and a saline fluid circulation.

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao https://doi.org/10.1...arrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    https://doi.org/10.1007/978-3-...
    Part of book or chapter of book . 2019 . Peer-reviewed
    License: Springer TDM
    Data sources: Crossref
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