Journal articles: 'Atlas de Marrakech'

1

Dresen, Georg. "Bruchtektonik und Schollenbau im Hohen Atlas südlich von Marrakech (Marokko)." Geologische Rundschau 74, no. 1 (1985): 95–108. http://dx.doi.org/10.1007/bf01764573.

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Daoudi, L. "Palygorskite in the uppermost Cretaceous–Eocene rocks from Marrakech High Atlas, Morocco." Journal of African Earth Sciences 39, no. 3-5 (2004): 353–58. http://dx.doi.org/10.1016/j.jafrearsci.2004.07.033.

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Schmidt, H., P. Mirchev, and G. Tsankov. "The egg parasitoids ofThaumetopoea pityocampa in the atlas Mountains near Marrakech (Morocco)." Phytoparasitica 25, no. 4 (1997): 275–81. http://dx.doi.org/10.1007/bf02981091.

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4

Busack, Stephen D. "Notes on the biology of Lacerta andreanszkyi (Reptilia: Lacertidae)." Amphibia-Reptilia 8, no. 3 (1987): 231–36. http://dx.doi.org/10.1163/156853887x00270.

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AbstractReported only from three general areas at elevations between 2500-3700 m within the High Atlas Mountains of Marrakech Prefecture, Morocco, Lacerta andreanszkyi appears little studied (Saint Girons, 1953; Pasteur and Bons, 1960; Bons, 1967; Klemmer, 1969). Since Werner's (1929) description of this apparently restricted apecies, nothing has been published regarding its biology. The following limited data concerning population density, biomass, sex ratio, feeding ecology, reproduction, frequency of injury, and thermal environment and response of this elusive species are presented below to partially fill this void.

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Rhouta, Benaissa, Ezzouhra Zatile, Lahcen Bouna, et al. "Comprehensive physicochemical study of dioctahedral palygorskite-rich clay from Marrakech High Atlas (Morocco)." Physics and Chemistry of Minerals 40, no. 5 (2013): 411–24. http://dx.doi.org/10.1007/s00269-013-0579-3.

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Boulanouar, M., M. Yacoubi, M. Messouli, and N. Coineau. "Un nouveau Microcharon (Isopoda, Janiroidea) du Maroc — origine et biogéographie historique." Bijdragen tot de Dierkunde 65, no. 1 (1995): 53–64. http://dx.doi.org/10.1163/26660644-06501005.

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The interstitial crustacean isopods of the genus Microcharon (Microparasellidae) are relatively well-diversified and widely distributed in Morocco. A new species, M. boutini, is described. The 5-dentate mandibular pars incisiva, the elongated inner lobe of the exopodite, and the reduced armature of the first male pleopod characterize the species. M. boutini n. sp. belongs to the monophyletic messoulii group of species, the most primitive representatives of the genus. The distribution of M. boutini n. sp. covers both the northwestern part of the Jbilet and the nearest adjacent plain, as well as the High Atlas of the Marrakech piedmont. From a historical biogeographic point of view, interstitial ancestral marine populations would have been left in subterranean continental waters by the regression of the “Phosphate Sea” during the Lutetian (Eocene). The distribution of the same species both in High Atlas valleys and in the Jbilet region poses an evolutionary rate problem.

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Vachard, Daniel, Jacques Beauchamp, and A. Tourani. "Le Carbonifère inférieur du Haut Atlas de Marrakech (Maroc) : faciès, microfossiles et traces fossiles." Géologie Méditerranéenne 18, no. 1 (1991): 3–19. http://dx.doi.org/10.3406/geolm.1991.1449.

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8

Doubinger, Jeanne, and Catherine Roy-Dias. "La paléoflore du Stéphanien de l'Oued zat(Haut-Atlas de Marrakech — versant nord — Maroc)." Geobios 18, no. 5 (1985): 573–93. http://dx.doi.org/10.1016/s0016-6995(85)80058-9.

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9

Leprêtre, R., Y. Missenard, J. Barbarand, C. Gautheron, I. Jouvie, and O. Saddiqi. "Polyphased Inversions of an Intracontinental Rift: Case Study of the Marrakech High Atlas, Morocco." Tectonics 37, no. 3 (2018): 818–41. http://dx.doi.org/10.1002/2017tc004693.

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10

Missenard, Yves, Omar Saddiqi, Jocelyn Barbarand, et al. "Cenozoic denudation in the Marrakech High Atlas, Morocco: insight from apatite fission-track thermochronology." Terra Nova 20, no. 3 (2008): 221–28. http://dx.doi.org/10.1111/j.1365-3121.2008.00810.x.

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Balestrieri, Maria Laura, Giovanna Moratti, Giulio Bigazzi, and Ahmed Algouti. "Neogene exhumation of the Marrakech High Atlas (Morocco) recorded by apatite fission-track analysis." Terra Nova 21, no. 2 (2009): 75–82. http://dx.doi.org/10.1111/j.1365-3121.2008.00857.x.

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12

Barakat, Ahmed, Christian Marignac, and Mohamed Bouabdelli. "Les dykes basiques du massif ancien de l'Ourika (Atlas de Marrakech, Maroc) : géochimie et signification." Comptes Rendus Geoscience 334, no. 11 (2002): 827–33. http://dx.doi.org/10.1016/s1631-0713(02)01822-9.

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13

Delcaillau, Bernard, Mostafa Amrhar, Mustapha Namous, Edgard Laville, Kevin Pedoja, and Olivier Dugué. "Transpressional tectonics in the Marrakech High Atlas: Insight by the geomorphic evolution of drainage basins." Geomorphology 134, no. 3-4 (2011): 344–62. http://dx.doi.org/10.1016/j.geomorph.2011.07.010.

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14

Ouhammou, Ahmed, and Pierre Aubin. "II - Aperçu sur l'étagement de la végétation du bassin de l'Ourika (Haut-Atlas de Marrakech, Maroc)." Bulletin mensuel de la Société linnéenne de Lyon 60, no. 10 (1991): 401–5. http://dx.doi.org/10.3406/linly.1991.14131.

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15

Domènech, Mireia, Daniel F. Stockli, and Antonio Teixell. "Detrital zircon U-Pb provenance and palaeogeography of Triassic rift basins in the Marrakech High Atlas." Terra Nova 30, no. 4 (2018): 310–18. http://dx.doi.org/10.1111/ter.12340.

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16

Pihan, J. C., and A. Mohati. "Les peuplements benthiques du reseau permanent de l'Oued Ourika, Haut Atlas de Marrakech; qualité des eaux." SIL Proceedings, 1922-2010 22, no. 4 (1985): 2110–13. http://dx.doi.org/10.1080/03680770.1983.11897631.

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17

AitMalek, O., H. ElHadi, H. ElHaibi, et al. "GEOCHEMISTRY OF TRIASSIC SANDSTONES (HIGH ATLAS OF MARRAKECH, MOROCCO): IMPLICATIONS FOR PROVENANCE, WEATHERING, AND TECTONIC SETTING." International Journal of Advanced Research 4, no. 6 (2016): 464–75. http://dx.doi.org/10.21474/ijar01/781.

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18

Chellaï, El Hassane, M. Marzoqi, M. Mouflih, and André Pascal. "Depositional sequences of carbonate ramp in the Eastern edge of Maastrichtian-Paleogene Atlantic Gulf (Atlas of Marrakech)." Géologie Méditerranéenne 21, no. 3 (1994): 39. http://dx.doi.org/10.3406/geolm.1994.1521.

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19

Domènech, Mireia, Antonio Teixell, Julien Babault, and Maria-Luisa Arboleya. "The inverted Triassic rift of the Marrakech High Atlas: A reappraisal of basin geometries and faulting histories." Tectonophysics 663 (November 2015): 177–91. http://dx.doi.org/10.1016/j.tecto.2015.03.017.

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20

Moreau, Jean-David, Naima Benaouiss, Abdelilah Tourani, et al. "A new ichnofauna from the Permian of the Zat Valley in the Marrakech High Atlas of Morocco." Journal of African Earth Sciences 172 (December 2020): 103973. http://dx.doi.org/10.1016/j.jafrearsci.2020.103973.

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21

Hughes, Philip D., William J. Fletcher, Benjamin A. Bell, et al. "Late Pleistocene glaciers to present-day snowpatches: a review and research recommendations for the Marrakech High Atlas." Mediterranean Geoscience Reviews 2, no. 1 (2020): 163–84. http://dx.doi.org/10.1007/s42990-020-00027-4.

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22

Marzoqi, Mohamed, and Andre Pascal. "Séquences de dépôts et tectono-eustatisme à la limite Crétacé/Tertiaire sur la marge sud-téthysienne (Atlas de Marrakech et bassin de Ouarzazate, Maroc)." Newsletters on Stratigraphy 38, no. 1 (2000): 57–80. http://dx.doi.org/10.1127/nos/38/2000/57.

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23

Abdelouhed, Farah, Ahmed Algouti, Abdellah Algouti, Idir EL konty, and Aboubakr Ezziyani. "Introduction to the cartographic and sedimentological study of the coverage of the TAHANAOUT BASIN (HIGH ATLAS, MOROCCO)." E3S Web of Conferences 234 (2021): 00028. http://dx.doi.org/10.1051/e3sconf/202123400028.

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This study is carried out on the northern edge of the High Atlas of the MARRAKECH basin. The TAHNAOUT DOUAR SOUR basin belongs to the Atlasic domain which is structured by the Hercynian orogeny, taken up and elevated by the Alpine orogeny, our main goal in this studying is to map the TAHNAOUT DOUAR SOUR basin and to characterize all these geological formations, For this purpose we analysed sedimentary tectonic structures ,made lithostratigraphic sections with description and draw a geological map at scale 1/25000 on a topographic background by used MapInfo platform. As final results, our studying of the TAHANOUT basin consists of two main lithological units: the basement formed by conglomeratic and turbidite deposits (alternating sandstone and pelites), and the lithological unit that forms the cover of the TAHNAOUT basin formed by a red detrital material and, carbonate deposits in some cases depending on the deposition environment, The TAHNAOUT basin is also affected by tectonic activity at the basement and Meso-Cenozoic cover levels [1-2]. Magmatic activity is absent and no trace has been recorded.

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24

El Arabi, El Hassane, Jean Ferrandini, and Rachid Essamoud. "Triassic stratigraphy and structural evolution of a rift basin: the Eç Çour basin, High atlas of Marrakech, Morocco." Journal of African Earth Sciences 36, no. 1-2 (2003): 29–39. http://dx.doi.org/10.1016/s0899-5362(03)00020-4.

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25

Delcaillau, Bernard, Edgard Laville, Mostafa Amhrar, Mustapha Namous, Olivier Dugué, and Kevin Pedoja. "Quaternary evolution of the Marrakech High Atlas and morphotectonic evidence of activity along the Tizi N'Test Fault, Morocco." Geomorphology 118, no. 3-4 (2010): 262–79. http://dx.doi.org/10.1016/j.geomorph.2010.01.006.

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26

Salomon, J., E. H. Chellai, F. Guerraoui, and J. Lang. "Dynamique sédimentaire et structuration, durant le Néogène, de la bordure nord du Haut Atlas Marocain (Haouz de Marrakech)." Journal of African Earth Sciences 22, no. 3 (1996): 323–34. http://dx.doi.org/10.1016/0899-5362(96)00007-3.

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27

Ourhzif, Z., A. Algouti, A. Algouti, and F. Hadach. "LITHOLOGICAL MAPPING USING LANDSAT 8 OLI AND ASTER MULTISPECTRAL DATA IN IMINI-OUNILLA DISTRICT SOUTH HIGH ATLAS OF MARRAKECH." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W13 (June 5, 2019): 1255–62. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w13-1255-2019.

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<p><strong>Abstract.</strong> This study exploited the multispectral Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and Landsat 8 Operational Land Imager (OLI) data in order to map lithological units and structural map in the south High Atlas of Marrakech. The method of analysis was used by principal component analysis (PCA), band ratios (BR), Minimum noise fraction (MNF) transformation. We performed a Support Vector Machine (SVM) classification method to allow the joint use of geomorphic features, textures and multispectral data of the Advanced Space-borne Thermal Emission and Reflection radiometer (ASTER) satellite. SVM based on ground truth in addition to the results of PCA and BR show an excellent correlation with the existing geological map of the study area. Consequently, the methodology proposed demonstrates a high potential of ASTER and Landsat 8 OLI data in lithological units discrimination. The application of the SVM methods on ASTER and Landsat satellite data show that these can be used as a powerful tool to explore and improve lithological mapping in mountainous semi-arid, the overall classification accuracy of Landsat8 OLI data is 97.28% and the Kappa Coefficient is 0.97. The overall classification accuracy of ASTER using nine bands (VNIR-SWIR) is 74.88% and the Kappa Coefficient is 0.71.</p>

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28

Ouahsine, H., and P. Lavandier. "Dynamique des populations larvaires de Baetis navasi M.-L. (Ephemeroptera) dans un torrent du Haut-Atlas de Marrakech, Maroc." Annales de Limnologie 24, no. 2 (1988): 167–71. http://dx.doi.org/10.1051/limn/1988014.

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29

Dominguez, Pablo, Francisco Zorondo-Rodríguez, and Victoria Reyes-García. "Relationships Between Religious Beliefs and Mountain Pasture Uses: A Case Study in the High Atlas Mountains of Marrakech, Morocco." Human Ecology 38, no. 3 (2010): 351–62. http://dx.doi.org/10.1007/s10745-010-9321-7.

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30

Barakat, Ahmed. "Gold mineralization in the Ourika Gneiss (High Atlas of Marrakech, Morocco): mineral paragenesis and fluid P-T-X evolution." Arabian Journal of Geosciences 8, no. 5 (2014): 3207–22. http://dx.doi.org/10.1007/s12517-014-1437-4.

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31

Perez, Nicholas D., Antonio Teixell, David Gómez‐Gras, and Daniel F. Stockli. "Reconstructing Extensional Basin Architecture and Provenance in the Marrakech High Atlas of Morocco: Implications for Rift Basins and Inversion Tectonics." Tectonics 38, no. 5 (2019): 1584–608. http://dx.doi.org/10.1029/2018tc005413.

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32

Oudra, B., M. Dadi-El Andaloussi, and V. M. Vasconcelos. "Identification and quantification of microcystins from a Nostoc muscorum bloom occurring in Oukaïmeden River (High-Atlas mountains of Marrakech, Morocco)." Environmental Monitoring and Assessment 149, no. 1-4 (2008): 437–44. http://dx.doi.org/10.1007/s10661-008-0220-y.

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33

Leprêtre, Rémi, Yves Missenard, Bertrand Saint-Bezar, et al. "The three main steps of the Marrakech High Atlas building in Morocco: Structural evidences from the southern foreland, Imini area." Journal of African Earth Sciences 109 (September 2015): 177–94. http://dx.doi.org/10.1016/j.jafrearsci.2015.05.013.

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34

Boudhar, Abdelghani, Lahoucine Hanich, Ahmed Marchane, Lionel Jarlan, and Abdelghani Chehbouni. "Apport des données FORMOSAT2 à la modélisation du contenu en eau du manteau neigeux du Haut Atlas marocain." Revue Française de Photogrammétrie et de Télédétection, no. 204 (April 8, 2014): 51–56. http://dx.doi.org/10.52638/rfpt.2013.21.

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Le présent travail a pour objectif d'améliorer notre connaissance du cycle de l'eau et en particulier de l'apport du manteau neigeux dans le bilan hydrologique au niveau du bassin versant montagneux du Rheraya au Sud de la ville de Marrakech. Vue la faiblesse du réseau de mesures hydrométéorologiques, nous nous sommes appuyés sur les données issues d'une séries d'images FORMOSAT2 de haute résolution spatiale (8 mètres) et temporelle (4 jours). Les données de télédétection, si elles permettent d'obtenir avec une bonne précision la surface occupée par la neige, ne permettent pas seules d'estimer leur équivalent en eau alors que c'est cette quantité qui régit le bilan hydrologique.La combinaison de ces données spatiales avec les mesures de terrain a permis la validation du modèle de fonte que nous avons calibré à l'échelle locale. Le modèle de fonte utilisé et de type degré jour a été initié à l'aide des données mesurées à une station située à 2600 mètres d'altitude. Les équivalents en eau (SWE) spatialisés sont ensuite validés de deux manières : 1) à l'aide des mesures au niveau d'une station à 3200m et 2) avec les surfaces enneigées obtenues à partir des données FORMOSAT2. Les résultats obtenus indiquent que les images FORMOSAT2 permettent une meilleure estimation du couvert nival à l'échelle du bassin versant. Les simulations des SWE indiquent une grande cohérence avec les mesures et les surfaces de neige observées.

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35

Delcaillau, Bernard, Olivier Dugué, Mustapha Namous, Kevin Pedoja, Mostafa Amrhar, and Edgard Laville. "Pleistocene fluviatile deposits in the Ourika drainage basin (Marrakech High Atlas, Morocco): indicators of climatic variations associated with base level change." Zeitschrift für Geomorphologie 60, no. 2 (2016): 131–50. http://dx.doi.org/10.1127/zfg/2016/0261.

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36

Ouhammou, Ahmed, Serge Muller, and Omar M'Hirit. "Impact des activités pastorales sur la biodiversité floristique dans une thuriféraie limitrophe du Parc national de Toubkal, Haut—Atlas de Marrakech, Maroc." Acta Botanica Gallica 143, no. 4-5 (1996): 393–401. http://dx.doi.org/10.1080/12538078.1996.10515735.

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37

Sabil, Mohammed, A. Habib, and Z. Benkhaldoun. "Interferential seeing monitor, a seeing monitor for atmospheric turbulence studies: calibration with the differential image motion monitor." Monthly Notices of the Royal Astronomical Society 500, no. 2 (2020): 1884–88. http://dx.doi.org/10.1093/mnras/staa2400.

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ABSTRACT In this work, we aim to calibrate an interferential seeing monitor (ISM), which is a testing instument used at astronomical sites. Its method is based on the study of the diffraction pattern produced by a Young’s double-slit at the focus plane of a telescope. This method allows us to obtain the wave structure function by taking into account both phase and amplitude fluctuations of the light wavefront. A phase seeing εϕ was assigned to phase fluctuations and an amplitude seeing εχ was assigned to amplitude fluctuations (scintillation phenomenon), which allows us to obtain both phase and amplitude fluctuations. The feasibility of the ISM method was demonstrated by numerical simulations presented in a previous work. In this work, we have conducted a cross-calibration campaign of the ISM with a differential image motion monitor (DIMM) over 16 nights at the Oukaimeden and Atlas Golf Marrakech Observatories. The goal of this campaign was to study the reliability of this new method. In this paper, we present the calibration measurements and a comparison between the seeing measured by the ISM (εϕ, εχ) and that obtained by the DIMM (εdimm). These results show good agreement between the phase- eeing εϕ and εdimm.

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38

Hajhouji, Youssef, Vincent Simonneaux, Simon Gascoin, et al. "Modélisation pluie-débit et analyse du régime d'un bassin versant semi-aride sous influence nivale. Cas du bassin versant du Rheraya (Haut Atlas, Maroc)." La Houille Blanche, no. 3 (June 2018): 49–62. http://dx.doi.org/10.1051/lhb/2018032.

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Le débit des rivières et la recharge des nappes dans la région de Marrakech sont étroitement liés à la dynamique hydrologique dans le Haut-Atlas. Pour anticiper les effets du changement climatique dans cette région où la demande en eau est croissante, il est essentiel de mieux connaitre la contribution respective de la fonte de la neige et des pluies au débit des oueds de montagne. Cette étude vise à modéliser les débits de l'oued Rheraya dans le Haut-Atlas marocain (225 km², altitudes comprises entre 1030 m et 4165 m) en prenant en compte la composante nivale. Pour cela, le modèle conceptuel global GR4J est appliqué sur la période 1989-2009 en y adjoignant le module CemaNeige qui simule la dynamique de la composante neigeuse de manière semi-distribuée. Ces travaux permettent d'affiner la caractérisation du régime hydrologique du bassin. La fraction enneigée simulée se révèle corrélée avec celle extraite du produit neige MODIS durant la période 2000-2009 (R2 = 0,64). De plus, l'équivalent en eau de la neige simulé est cohérent avec celui mesuré par une station automatique durant la période 2004-2006 (R2 = 0,81). Enfin, nous obtenons une simulation des débits qui reproduit bien la très forte variabilité saisonnière et interannuelle. Le Nash relativement faible par rapport aux standards habituels (0,45) peut s'expliquer par la faible qualité des mesures de débit (régime d'oued à lit instable). En conclusion, le régime hydrologique de l'oued Rheraya est pluvio-nival avec une distribution des débits unimodale dont le maximum en avril coïncide avec la fonte des neiges. C'est à ce moment que les populations en aval sont les plus vulnérables au déficit de débit car les cultures irriguées entrent en période de croissance.

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Farah, Abdelouhed, Ahmed Algouti, Abdellah Algouti, Kamal El badaoui, Maryam Errami, and Mohammed Ifkirne. "Lithological mapping and automatic lineament extraction using Aster and Gdem data in the Imini-Ounilla-Asfalou district, South High Atlas of Marrakech, Morocco." E3S Web of Conferences 240 (2021): 04002. http://dx.doi.org/10.1051/e3sconf/202124004002.

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Lithological and lineament mapping using remote sensing is a fundamental step in various geological studies, as it forms the basis for the interpretation and validation of the results obtained. There were two objectives for this study, applied in the Imini-Ounilla-Asfalou district, South High Atlas of Marrakech region: first, lithological mapping by satellite image processing techniques such as ASTER L1B (hight spectral and spatial resolution), namely Principal Component Analysis (PCA), Minimum Noise Fraction (MNF), as well as the application of three types of supervised classification, namely Spectral Angle Mapper (SAM), Maximum Likelihood (ML) and Minimum Distance (MD), on the visible/near-infrared (VNIR) and short-wave infrared (SWIR) spectral bands of our ASTER image; second, an analysis of the distribution of lineaments by automatic extraction using a Global Digital Elevation Model (GDEM) and the PC1 image derived from the PCA transformation applied to the satellite image. The best results are highlighted by the delineation of new facies in relation to the existing map; after confirmation in the field, all of these facies, which include Eocene, Triassic and Jurassic formations, are represented on the new map. The results of lineaments showed that each of them systematically shows a similarity in terms of concentration and orientation, with four preferential oriented systems: NE-SW, E-W, NNE-SSW and NW-SE. The lineaments mainly follow those of the major fault zones, with high concentrations in the northeast and southwest parts of the study area.

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40

Domènech, Mireia, Antonio Teixell, and Daniel F. Stockli. "Magnitude of rift-related burial and orogenic contraction in the Marrakech High Atlas revealed by zircon (U-Th)/He thermochronology and thermal modeling." Tectonics 35, no. 11 (2016): 2609–35. http://dx.doi.org/10.1002/2016tc004283.

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41

Ouarhache, Driss, André Charriere, Françoise Chalot-prat, and Mohamed EL Wartiti. "Triassic to early Liassic continental rifting chronology and process at the southwest margin of the Alpine Tethys (Middle Atlas and High Moulouya, Morocco); correlations with the Atlantic rifting, synchronous and diachronous." Bulletin de la Société Géologique de France 183, no. 3 (2012): 233–49. http://dx.doi.org/10.2113/gssgfbull.183.3.233.

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AbstractApparu à l’est du rift continental atlantique, un rift continental téthysien s’est développé sur le domaine atlasique du Maroc au cours du Trias et du début du Jurassique. Dans le transect étudié du Moyen Atlas et de la Haute Moulouya (MAHM), ce début du rifting téthysien, le « rifting initial », comporta 3 étapes majeures.Au Trias supérieur, apparut une première génération de bassins syn-rift (sr1) continentaux et détritiques, associés au rejeu extensif de certaines sutures hercyniennes ; cette phase se poursuivit avec une transgression laguno-marine généralisée dans un stade post-rift (pr1) au Carnien supérieur-Norien.Au voisinage de la limite Trias-Lias, se produisit une effusion de trapps basaltiques aériens à subaquatiques ; la région subit ensuite une phase d’érosion.Au début du Lias, se différencia une deuxième génération de bassins syn-rift (sr2) continentaux ou laguno-marins, extensifs ou transtensifs, associés à un volcanisme explosif localisé sur quatre zones faillées (faille d’Adarouch, accident du Tizi n’Trettène, accident Sud Moyen atlasique, faille de Ksabi-Ahouli) ; cette phase se clôtura avec l’arrivée de la mer dans un stade post-rift (pr2) débutant au Sinémurien supérieur-Carixien inférieur.La zone du MAHM eut une histoire différente des régions occidentales du domaine atlasique, qu’il s’agisse d’un autre segment du rift atlasique (Haut Atlas de Marrakech) ou d’une bordure du rift atlantique (Haut Atlas occidental).Pendant le rifting ante-trapp, alors que ces bassins occidentaux ont été structurés par plusieurs séquences tectono-sédimentaires successives étagées du Permien supérieur au Trias supérieur, les bassins du MAHM n’enregistrèrent qu’une seule mégaséquence sédimentaire triasique. Ainsi, les rifts continentaux atlantique et Ouest atlasique furent initiés, simultanément (?), dès le Permien supérieur, tandis que le rift continental de l’Atlas central et oriental n’apparut vraisemblablement qu’au Trias supérieur. La déchirure du rift atlasique migra ainsi vers l’est de la fin du Primaire au début du Secondaire.Durant la période post-trapp, alors que les bassins occidentaux étaient le siège d’un calme tectonique relatif, une fracturation majeure affecta le MAHM, générant de nouveaux bassins sédimentaires associés à un second épisode volcanique, de nature explosive cette fois. Cette poursuite du rifting, après les dernières effusions basaltiques et avant l’arrivée de la mer jurassique, préfigura les découpages tectoniques qui continuèrent de se manifester dans les parties centrale et orientale du rift atlasique jusqu’au Jurassique moyen.

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Ouahsine, H., R. Céréghino, and P. Lavandier. "Influence of temperature and macrophytes development on the larval population dynamics ofEpeorus sylvicolaPict (Ephemeroptera) in a torrential river of the «Haut-Atlas de Marrakech» (Morocco)." Annales de Limnologie - International Journal of Limnology 32, no. 1 (1996): 27–31. http://dx.doi.org/10.1051/limn/1996002.

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Modeste, Meliho, Khattabi Abdellatif, Mhammdi Nadia, and Hongming Zhang. "Cartographie Des Risques De L’erosion Hydrique Par L’equation Universelle Revisee Des Pertes En Sols, La Teledetection Et Les Sig Dans Le Bassin Versant De L’ourika (Haut Atlas, Maroc)." European Scientific Journal, ESJ 12, no. 32 (2016): 277. http://dx.doi.org/10.19044/esj.2016.v12n32p277.

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Covering an area of 576 square kilometers, the Ourika watershed is a sub-watershed of the large Tensift basin, located on the northwest slopes of the Marrakech High Atlas, in mid-west Morocco. This basin of dramatic topography, with sparse vegetation cover and friable substrates, is under increasing human action exacerbated by a variable and changing climate. Its vulnerability to water erosion is quite high, increasing risks of wadi flows with significant sediment loads. The aim of this work was to quantify soil loss in the basin using the Revised Universal Soil Loss Equation (RUSLE) and Geographic Information System. The results showed that the Ourika watershed was subject to strong climatic aggressiveness ranging from 55.22 to 100.57 MJ.mm/ha.h. The average soil erodibility value, K, was 0.48 t.ha.h/ha.MJ.mm, with a standard deviation of 0.28 t.ha.h/ha.MJ.mm. Slopes with values higher than 35% represented 72% of the watershed’s area, with the topographic factor, LS, values ranging from 0.01 to 94.5. The vegetation factor was high throughout the Ourika watershed while C values were higher than 0.5 for 73% of the watershed’s area. The average soil loss obtained in the basin was 380 t/ha/year. These results indicated that 48% of the watershed’s area was subject to a soil loss between 50-400 t/ha/year, and between 400 and 1000 t/ha/year for 30% of the watershed. Soil loss below the tolerance level (<7 t/ha/year) represented only 4% of the watershed area. These findings served in highlighting the significance of erosion in the Ourika watershed.

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Dominguez, Pablo. "Transformación de instituciones religiosas tradicionales en el Alto Atlas de Marrakech (Marruecos) y su impacto en los ecosistemas sub- alpinos. Caso del sistema pastoral del agdal." Perifèria. Revista d'investigació i formació en Antropologia 7, no. 2 (2007): 1. http://dx.doi.org/10.5565/rev/periferia.666.

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El Khalki, El Mahdi, Yves Tramblay, Christian Massari, et al. "Challenges in flood modeling over data-scarce regions: how to exploit globally available soil moisture products to estimate antecedent soil wetness conditions in Morocco." Natural Hazards and Earth System Sciences 20, no. 10 (2020): 2591–607. http://dx.doi.org/10.5194/nhess-20-2591-2020.

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Abstract. The Mediterranean region is characterized by intense rainfall events giving rise to devastating floods. In Maghreb countries such as Morocco, there is a strong need for forecasting systems to reduce the impacts of floods. The development of such a system in the case of ungauged catchments is complicated, but remote-sensing products could overcome the lack of in situ measurements. The soil moisture content can strongly modulate the magnitude of flood events and consequently is a crucial parameter to take into account for flood modeling. In this study, different soil moisture products (European Space Agency Climate Change Initiative, ESA-CCI; Soil Moisture and Ocean Salinity, SMOS; Soil Moisture and Ocean Salinity by the Institut National de la Recherche Agronomique and Centre d'Etudes Spatiales de la Biosphère, SMOS-IC; Advanced Scatterometer, ASCAT; and ERA5 reanalysis) are compared to in situ measurements and one continuous soil-moisture-accounting (SMA) model for basins located in the High Atlas Mountains, upstream of the city of Marrakech. The results show that the SMOS-IC satellite product and the ERA5 reanalysis are best correlated with observed soil moisture and with the SMA model outputs. The different soil moisture datasets were also compared to estimate the initial soil moisture condition for an event-based hydrological model based on the Soil Conservation Service curve number (SCS-CN). The ASCAT, SMOS-IC, and ERA5 products performed equally well in validation to simulate floods, outperforming daily in situ soil moisture measurements that may not be representative of the whole catchment soil moisture conditions. The results also indicated that the daily time step may not fully represent the saturation state before a flood event due to the rapid decay of soil moisture after rainfall in these semiarid environments. Indeed, at the hourly time step, ERA5 and in situ measurements were found to better represent the initial soil moisture conditions of the SCS-CN model by comparison with the daily time step. The results of this work could be used to implement efficient flood modeling and forecasting systems in semiarid regions where soil moisture measurements are lacking.

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Bittmann, Jürgen. "Auf den Spuren von Oskar Lenz – von Marrakesch über den Hohen Atlas ins Draa-Tal." Mitteilungen der Österreichischen Geographischen Gesellschaft 154 (2013): 261–89. http://dx.doi.org/10.1553/moegg154s261.

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Missenard, Yves, Zouhair Taki, Dominique Frizon de Lamotte, et al. "Tectonic styles in the Marrakesh High Atlas (Morocco): The role of heritage and mechanical stratigraphy." Journal of African Earth Sciences 48, no. 4 (2007): 247–66. http://dx.doi.org/10.1016/j.jafrearsci.2007.03.007.

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Sabir, B., M. Cherkaoui, A. Baali, O. Lemaire, J. M. Dugoujon, and G. Boëtsch. "Characterisation of the digital dermatoglyphic in a berber population of the high Atlas (Marrakesh, Morrocco)." International Journal of Anthropology 20, no. 3-4 (2005): 277–89. http://dx.doi.org/10.1007/bf02443063.

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Hadach, Fatiha, Ahmed Algouti, Abdellah Algouti, and Zahra Mourabit. "Aptian–Albian deposits of the Ait Ourir basin (High Atlas, Morocco): New additional data on their paleoenvironment, sedimentology, and palaeogeography." Open Geosciences 12, no. 1 (2020): 1557–72. http://dx.doi.org/10.1515/geo-2020-0214.

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AbstractThis sedimentological and palaeontological analysis of the Aptian–Albian sedimentary succession of the Ait Ourir basin in the High Atlas Mountains of Marrakesh in Morocco provides new data from a previously poorly understood basin. The palaeoenvironmental evolution is deduced based on a facies analysis allowing the restoring of depositional environments and their stratigraphic architecture. Within the Aptian–Albian succession, we distinguish two sedimentary sequences separated by a major discontinuity. The first sequence is composed of calcareous and dolomitic marls with the rudist Pseudotoucasia catalaunica of the Tadhart formation (upper Aptian in age) and of strongly dolomitized limestones with corals (Eugyra sp., Thalamocaeniopsis sp., and Holocystis sp.) of the Lemgo formation (uppermost Aptian in age). These two formations were formed in an internal carbonate platform (the intertidal zone to the subtidal zone). The second sequence, Albian in age, is composed of sandy limestones of the Oued Tidzi formation and is represented by sediments showing terrigenous influence, with deposits of silt, sandstone, dolomitic sandstone, and limestone.

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Benaouiss, Nai¨ma, Louis Courel, and Jacques Beauchamp. "Rift-controlled fluvial/tidal transitional series in the Oukai¨meden Sandstones, High Atlas of Marrakesh (Morocco)." Sedimentary Geology 107, no. 1-2 (1996): 21–36. http://dx.doi.org/10.1016/s0037-0738(96)00013-9.

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Journal articles on the topic 'Atlas de Marrakech'

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