Dissertations / Theses on the topic 'Géologie – Maroc – Rif (Maroc ; massif)'
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Labrousse, Mourad. "Modélisation numérique des plis de rupture, applications à des exemples naturels (rides sud-rifaines, Maroc et cordillères ibériques, Espagne)." Pau, 1998. http://www.theses.fr/1998PAUU3012.
Full textAbakarim, Abdennacer. "Etude géologique de la partie occidentale de la rive sud du détroit de Gibraltar (Rif, Maroc) dans le cadre de la liaison fixe Europe-Afrique." Pau, 1991. http://www.theses.fr/1991PAUU3014.
Full textEladraoui, Abdessamad. "Etude géologique de la zone de passage entre le rif oriental et l'avant-pays (Gareb occidental, Maroc)." Toulouse 3, 1987. http://www.theses.fr/1987TOU30212.
Full textKerchaoui, Said. "Étude géologique et structurale du massif des Beni Bou Ifrour (Rif Oriental, Maroc)." Paris 11, 1985. http://www.theses.fr/1985PA112221.
Full textThe lithostratigraphic and structural analysis of the Beni Bou Ifrour’s massif show distinct areas: - a northern unit (Ouiksan’s area) characterized by carbonate sedimentation in the upper Jurassic, and detritic deposits with volcano-sedimentary material in the lower Cretaceous (Berriasian). This area is characterized by many tectonic stages; - a southern unit “the J. Harcha’s area” characterized by Liassic carbonate-sedimentation at the bottom and terminated by a calcarenitic Miocene formation. This area is characterized by a single tectonic stage. The northern part of the massif is intruded by a granodiorite which intersects the schistosty. The granodiorite is chemically similar to surrounding volcanic rocks. This study permits to connect structurally the massif Beni Bou Ifrour with the Temsamane’s massif (external Rif) ; lithostratigraphycally this massif is situated like an intermediate element between the Rif belt (Temsamane’s massif) and fore land (the Gareb belt)
Al, Saffar Mohammad. "Géométrie et modélisation numérique des structures anticlinales : exemples, Atlas saharien (Algérie), Rides sud Rifaines (Maroc) et Pyrénées (France et Espagne)." Pau, 1993. http://www.theses.fr/1993PAUU3034.
Full textHomonnay, Emmanuelle. "Évolution tectono-métamorphique et chronologie de mise en place des unités métamorphiques du Rif interne (Maroc)." Thesis, Université Côte d'Azur (ComUE), 2019. http://www.theses.fr/2019AZUR4111.
Full textThe Betic-Rif Cordillera, located in the western part of the Mediterranean, results from the convergence of the European and African plates and related subduction processes. It is therefore an exceptional site to study the processes induced by subduction dynamics. This thesis focuses on the study of the internal domain of the Rif chain. Two key areas have been selected (Ceuta and Cabo Negro) where high pressure-low temperature crustal rocks (HP-LT) (present only in Ceuta) but also low pressure-high temperature rocks (LP-HT) and ultrabasic rocks outcrop. Their tectonic significance, placement mode and ages are still heavily debated subjects. A multidisciplinary approach was developed to carry out this work, with a detailed structural and petrographic study, as well as U/Th/Pb dating on zircon, monazite and xenotime and 40Ar/39Ar on white mica. The results obtained show that: (i) at circa 29 Ma a medium pressure-high temperature metamorphism (MP-HT) affects the lower Sebtides and Ghomarides. This phase is simultaneous with a thickening of the crust and the placement of diorite sill having a geochemical signature of calc-alkaline to high-K magmatic arc. This phase is contemporaneous to the HP-LT metamorphism observed in the crustal units of the upper Sebtides (ii) at circa 21 Ma an extension phase contributes to the final exhumation of these rocks. This event is associated with a metamorphic episode developed at the boundary between Amphibolite and Greenschist facies conditions, at 400-550°C and 1-3 kbar. The quasi-contemporary emplacement of metamorphic units with radically different thermal gradients is characteristic of “paired metamorphic belts”. In this case we propose the following model: at 29 Ma, during Alpine subduction, the units of the Ghomarides and Lower Sebtides are located within the upper plate of the subduction system where the MP-HT metamorphism develops. In parallel, the HP-LT metamorphism occurs within the lower plate constituted by the upper Sebtides. Dehydration of the lower plate induces calc-alkaline magmatism in the upper plate. At 21 Ma, the slab rollback produces an extension phase creating the opening of the Alboran basin and the exhumation of the HP-LT units
El, Bakili Asmae. "Evolution tectono-metamorphique et chronologique des unités métamorphiques du Rif interne (Beni Bousera, Nord du Maroc)." Thesis, Université Côte d'Azur, 2021. http://www.theses.fr/2021COAZ4034.
Full textLocated at the extreme tip of the western Mediterranean, the Betic-Rif orogenic system is built through a complex alpine orogenic history involving processes of subduction related to convergence between Africa and Eurasia since the Cretaceous. A remarkable discovery during the last four decades of geological investigations, has been the remains of a variscan event in the internal zones of the belt. These results underline the presence of two superimposed orogenic systems, the internal zones of the belt thus remain a privileged area to study the importance of the structural and the metamorphic heritage in the partial or total reactivation by the most recent events. This work is located in the Beni Bousera sector, where crustal and mantle rocks that form the innermost units of the chain are exposed. Based on structural and petrological analyses, U-Th-Pb dating on monazite and 40Ar-39Ar dating on micas and amphiboles. The history of the Betic-Rif belt can be summarized as it follows: 1) a HP-HT event affects the base of the internal domain at around 281 ± 3 Ma. These new petrological and geochronological data obtained in the internal Rif, are correlated with the Betics, the Kabyle, the Edough massif of Algeria, the Mauritanian, and the Appalachian belts, attesting a convergent domain during the late Carboniferous – early Permian. All of these orogenic segments are part of the North African Variscides built at the north-western margin of Gondwana in response to convergence between the later and Laurentia. 2) at around 29-26 Ma, a Barrovian to Abukuma metamorphic event affects the Sebtides (the innermost units of the chain) and interpreted as the evolution of the upper plate of a subduction zone. This alpine event is typically characterized by a prograde metamorphic path marked by heating affecting the base of the Sebtides between 26 to 22 Ma, such conditions reflect thinning and heating of the crust related to the asthenosphere upwelling due to slab roll-back. This event marks the beginning of a major extensive event. 3) In the Miocene around 22-20 Ma, the internal zones are affected by an E-W extension contemporary to the opening of the Alboran Basin in a back-arc context, and the intrusion of granitic dykes into the peridotites and crustal metamorphic units, the exhumation of the Sebtides was complete at this time. 4) From early to middle Miocène, the Betic-Rif belt acquired its arcuate geometry (the Gibraltar Arc) during the collision between the Internal and the external zones, attested by de NE-SW to E-W shortening phases across the arc. 5) more lately prior to Pliocene, the Gibraltar arc was subjected to contractional possess related to a N-S shortening phase, which drastically altered its geometry
Benyaich, Ahmed. "Evolution tectono-sédimentaire du Rif externe centro-occidental (régions de M'sila et Ouezzane, Maroc) : La marge africaine du Jurassique au Crétacé : Les bassins néogènes d'avant-fosse." Pau, 1991. http://www.theses.fr/1991PAUU3004.
Full textMorel, Jean-Luc. "Évolution récente de l'orogène rifain et de son avant-pays depuis la fin de la mise en place des nappes (Rif, Maroc)." Paris 11, 1987. http://www.theses.fr/1987PA112504.
Full textChtitah, Abdelkader. "Paléo-environnements plio-pléistocènes et morphogènese actuelle dans le bassin de Ai͏̈n Zora (Rif oriental, Maroc)." Paris 10, 1998. http://www.theses.fr/1998PA100040.
Full textEl, Harrar El Imrani Mustapha. "Morphologie actuelle des côtes rocheuses et des plages d'un secteur de la côte du rif à l'est de Tetouan." Brest, 1988. http://www.theses.fr/1988BRES1004.
Full textAfter a general outline of the investigated area, and of its climatic, marine and hydrological environment, the rocky parts of the coast are described and classified (cliffs, features related and not related to marine processes, corrosion forms in various rocks); an interpretation is given of the genesis of the corrosion and abrasion forms. A shorter section concerns the beaches and coastal dunes (major and minor forms, various sand indexes, pebble beaches)
Gartet, Abdelghani. "Morphogénèse et hydrologie dans le bassin versant de l'oued Lebène (Rif méridional et Prérif central et oriental, Maroc)." Aix-Marseille 1, 1994. http://www.theses.fr/1994AIX10078.
Full textThe bassin of the lebene wadi is a heterogeneous entity integrating the southern rif's and the pre-rif's unity. Its structure is the result of carrying, resting on the original unities. At the end of the miocene, all of it was put through active tectonics. The lithostructural contrast and the differential erosion explain the organization of the morphological system in which the dense hydrographic network has resulted in the present from of the relief. Hydrographic network has resulted in the present form of the relief. Six levels belonging successively to ancient. Middle and recent quaternary periods trace the basin's evolution. The karstic froms and the slopes which bear marks of the col climate have much developed since. Most of the elements of the relief bear thick detrial formations which constitute at present a stock of mibilizable materials. The deposits that have followed the latest rharbian accumulations reflect the chemical, hydraulic, mechanical and anthropical erosive activity. The hydraulics of the lebene express the brutal character and the exterme variations depending directly on the precipitations and governed by its morphometricla and morphological characteristics. The average hydrological outcome is almost stable. The outflows of exceptionnally dry or humid years show exterme deviations regarding the module. The wintertime floods are brutal and the summertime low water is frequent and durable. Al of this has repercussions on the natural environment and the human society. The hydrochemics of the water show a strong concentration of ions of the sodium-chlorine
Gartet, Jaouad. "Contribution à la connaissance de la dynamique fluviatile au pléistocène supérieur et à l'holocène dans la vallée de l'Ouerrha : Etude des dépôts des basses et très basses terrasses de l'Ouerrha (Rif - Maroc)." Aix-Marseille 1, 2001. http://www.theses.fr/2001AIX10017.
Full textBachnou, Ali. "Stratigraphie et faunes d'ammonites du Malm-Berriasien basal dans la région du moyen Ouerrha (prérif interne, Maroc)." Lyon 1, 1992. https://tel.archives-ouvertes.fr/tel-02334096/document.
Full textEl, Kharim Younès. "Sédimentologie et palynologie du néogène du bassin de Boudinar : implications paléogéographiques et paléoclimatiques (Rif nord-oriental, Maroc)." Lyon 1, 1990. http://www.theses.fr/1990LYO10182.
Full textEl, Yamani Arkhouch. "Une région du rif : (La plaine d'Al-Hoceima) en cours de Transformation (Centre Nord du Maroc)." Nancy 2, 1988. http://www.theses.fr/1988NAN21016.
Full textLike many mediterranean regions, the plain of al-hoceima, which is overpopulated, is inhabited by sedentary country people, who hang on to their small fields. The farming of cereals and the limited rearing of animals do not satisfy the subsistance of the inhabitants. Natural factors impose a poor economy, which is based on traditional agriculture resulting in low and irregular crops. To maintain an average level of living for the inhabitants so as to limit rural exodus on the one hand and to carry out some substructure changes on the other, the government tried to help the country men by building the dam of "abdelkrim khettabi" and by developing the plain of al-hoceima, which presents the principal changes taking in this area. An examination of the new rural situation shows that government contributions consist essentially of technical things, while agrarian problems are almost ignored ; hence, the predominence of fallow lands in the plain has led to the failure of the project of rural modernisation in the plain. However we managed to solve the problem of drinking water
Blidi, Mourad. "Les calciturbidités à silex de la dorsale calcaire externe entre Chaouen et Assifane (Rif interne, Maroc), témoin d'un rifting liasique téthysien." Pau, 1993. http://www.theses.fr/1993PAUU3036.
Full textPateau, Mélanie. "Dynamiques superficielles et gestion des risques de l'arrière-pays du complexe portuaire"Tanger Med" (Rif septentrional, Maroc)." Paris 7, 2014. http://www.theses.fr/2014PA070046.
Full textNorthern Morocco, a long time marginalized, experiencing unprecedented development carried by large projects such as the harbor complex "Tanger Med". Its hinterland is highly prone to the release of erosive phenomena by the combination of natural factors predisposing (mountainous terrain, little resistant and tectonized lithology, degraded vegetation cover), a climate with high rainfall aggressiveness and pressure of human activities on soils and vegetation (clearing, overgrazing, cultural practices unsuited). The harbor complex and its impressive facilities (three ports, processing and logistics areas, motorway and rail networks) have profoundly affected both slopes dynamics of the hinterland and the local people life without any real previous impact assessment. In this context, this work provides an inventory of slope movements and a precise description of areas and infrastructure highly vulnerable to this hazard. The detailed field study is completed by a diachronic analysis of land use between. 1965 and the present as well as a mapping of slope movements susceptibility (combination index and the matrix GIS methods) from predisposing factors previously determined by statistical analysis (chi-square test, Cramer's V coefficient). These physical, socioeconomic but also institutional requirements hinder the implementation of a real policy of natural risks prevention and management although the Tanger-Tetouan region tries to remedy it since decade
Dahan, Mohamed El. "Chaouen et sa région." Tours, 1996. http://www.theses.fr/1996TOUR1503.
Full textChaouen is a traditional town deep-rooted in the moroccan history. It remains a small town in spite of a relatively eccelerated extension since the evolution of its statute. Named at the head of a province which is pulled away from tetouan. Chaouen connot get rid of the tutelage of its old chief town. On the contrary, it has very loose relations with ouezzane which is situated at the same distance in the south, essentially turned towards the west. In the bosom of its administrative mountainows space, with few means of communication and without big resources, chaouen can exert only a weak expropriation
Gauché, Evelyne. "Les campagnes des Beni Saïd (Rif oriental, Maroc) : l'exemple de la crise d'une montagne et de son avant-pays." Paris 10, 2002. http://www.theses.fr/2002PA100144.
Full textBenabderrazzak, Samir. "Politique d'aménagement et du développement économique et social du Maroc : cas des provinces du Nord." Nice, 2002. http://www.theses.fr/2002NICE0025.
Full textAmraoui, Allal. "Hydrogéologie de la dorsale calcaire du Rif (Maroc septentrional)." Phd thesis, Grenoble 1, 1988. http://tel.archives-ouvertes.fr/tel-00785579.
Full textKerzazi, Karima. "Etude biostratigraphique du Miocène sur la base des foraminifères planctoniques et nannofossiles calcaires dans le Prérif et la marge atlantique du Maroc (site 547A du DSDP Leg 79), aperçu sur leur paléoenvironnement." Paris 6, 1994. http://www.theses.fr/1994PA066164.
Full textHaraj, Touzani Mohammed. "L'érosion dans le Prérif et sa bordure rifaine (ravinement) : étude quantitative)." Paris 7, 1993. http://www.theses.fr/1993PA070036.
Full textThe measures of goulines have been controled during 3 years (from may 1988 to june 1991) and these measures allowed us to compare the erosion's speed at different places according to the topography and other specific physicochemical characters of the botanical and humain environnement. The erosion's results and their saisonnal variations have been treated statistically. This thesis is presented in 4 sections. - first section : presentation of the distinctive physical and humain features of our terrain (field). - second section : study of the slope's dynamics and description of different kinds of erosion observed. - third section : statistical study of the outcome of the goulines measures by factor analysis. - forth section : synthesis
Al, Karkouri Jamal. "Le Bas-pays de l'Oued Rhis (Rif central, Al Hoceima, Maroc) : modelé, formations superficielles, sols." Toulouse 2, 1988. http://www.theses.fr/1988TOU20048.
Full textOn the basis of a systematic and detailed mapping, endossed by laboratory analysis concentrated mainly on sedimentology, the chemical, minerlogical and micromorphological characteristics, the auther caracteruzed in the wether land of rhis oued (central rif, morocco) the types of surface deposition cover formations, their modes of deposition, their alteration and pedologic evolution. The evolution of thess formations could be summarized in the differenciation more or less pushed of the calcrete profile and the general tenduary to fluvisols. The microscopic fabric of calcarous crusts shows the role of the carbonates as an alteration agent by epigenisis. The study of fluviatile terraces underlines the great analogy of the hydrodynamic conditions of alluvial setting and the close relationship between the degree of the evolution of weathring profile and the age of alluvial formations
Younoussi, Abdelhamid. "Problèmes d'érosion et aménagement dans les montagnes du Rif central, Maroc : exemple de Tafrant moyen Ouergha." Université Joseph Fourier (Grenoble), 1992. http://www.theses.fr/1992GRE1A001.
Full textThe problem of erosion in Tafrant mid-Ouergha is a crucial one. This phenomenon is everyday manifestations which are widespread throughout the region because of favorable conditions. Effectively, the structure, which is characterized by multiple thrusting water sheets such as thase of Ketama, Tangier, Loukos, and ouezzane, gives a young and vigorous relief consisting of a number of ridges ( ridges of Benimesguilda, Tafrant-Tabouda, and ridges of Beni Oueriagel). The lithology dominated by series of marl-particulary in the sectors of the pre-rifaine zone, and the mid-parts of ridges-remains favorable for the erosion's manifestations. The climatic factor is also very important since it has disastrous effects on the soils. The heavy rain, concentrated in few days of the year causes tremendous damages. In addition to what have been mentioned above, there is an anthropic action which contributes to the break-down of the natural equilibrium in this region ? Thus the current erosion's forms are obuious in most slopes. Among these forms, we have gullies, slides and muddy flows. The various anti-erosive attempts are limited, and sometimes they miss-fit the region's conditions
Kharrim, Mohammed Rida. "Pectinides du néogène du bassin de Boudinar (Rif oriental, Maroc)." Lyon 1, 1987. http://www.theses.fr/1987LYO11756.
Full textChabbi, Abad. "Conditions écologiques et dynamique de la végétation : basses montagnes du Rif occidental au Maroc." Bordeaux 3, 1994. http://www.theses.fr/1994BOR30035.
Full textThe subject of this study ecological conditions of the growing stock in the low mountains of the occidental rif in morocco. Cork oak (quercus suber) is the species of these woodlands. The regressive dynamics of the vegetation was of major interest. In the past, these cork oak were subject to a management project, which was never finished for reasons of accessibility and finance. Today the degradation of the rif area is a big ecological problem. During 4 years of investigation we dealt with the role of climatic and pedological conditions and particularly with the relation between plant species and ecological variables, using of "factor analyses of correspondances" (f. A. C. ). Further anthropological and sociopolitical factors were taken into account. Important remarks have been made concerning the impact of fire not only on group dynamics but also on mortality and burning losses. The speed of stand types regression was measured by examination of two aireal photographs, which were taken within a scope of 20 years. Finally the development of an original synthesis of photographic materiel out of superposition of cartographic material became possible. It shows the regressive dynamics of the three growing stocks of ahl serif, beni issef and soumata. During this study it became apparent that there is not equilibrium between the vegetation and its environmental factors. The vegetation is not at its climax. In fact, the low mountains of the occidental rif have suffered since many ages from degradation as a result of cutting and burning due to cultivation and pasture. We note that the witnesses of the ancient landscape have been registered by the soil profiles and underlined by the presence of characteristic species. By this study we want to attract the attention of the. .
Mohatar, Marzuk Mokhtar. "De la contestation à la représentation : Carrière morale des militants, développement et nouvelles alliances : Le cas du Rif Central (Nord du Maroc) 1980-2005." Paris, EHESS, 2006. http://www.theses.fr/2006EHES0236.
Full textThis research employs interviews and observations to analyse the consequences of proliferation of Development NGO's in Morocco during the 1990's. The author carries out a "case study" in the Berber-speaking region of the Central Rif (Northern Morocco) between 1980 and 2005
Dergal, Abdelbaki. "L'oued ettaifi etude hydrologique d'un cours d'eau du rif occidental maroc)." Toulouse 2, 1988. http://www.theses.fr/1988TOU20042.
Full textOued ettaifi is a small tributary of oued el meharhar. Its basin has 38 km2 of surface. It is exposed to the atlantic. The basin profits from a mediterraneen climat with a great oceanic impact. The preci pitations are well concentrated in winter and their interannual and intra-annual variation is very important; moreover, summer is long and always dry. In the drainage basin the high hills of flyschs and marls dominate other geomorpholo gical groups where water profing reigns. And in conjonction with steep slopes, the phases of direct superficial flowing set out rapidly, and the erosive processes become more active, particularily in high hills. The feeding of ettaifi is uniquely pluvial, the runoff is very irregular from one season to an other, and from one year to an other. In summer hydrological drouht is total. The hydrological structure of the basin is characterized by the importance of hydrographical net work reservoir and by the weakness of the underground reserve. The repercussions of this structure are translated by the rapidity of torrential flooding which articulate considerable water volumes and loads. Ettaifi basin is a very representatif pattern of the graet basin of the tangerois which attains 1000 km2
El, Bouzidi Aïssa. "Vallée moyenne de l'oued Lebène (Prérif, Maroc) étude de cartographie géomorphologique /." Lille 3 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37604840s.
Full textBarhoun, Nadia. "Les foraminifères planctoniques du néogène du bassin de Boudinar (Rif nord-oriental, Maroc) : biostratigraphie, systématique et paléoécologie." Lyon 1, 1991. https://tel.archives-ouvertes.fr/tel-01998644/document.
Full textBenzaggagh, Mohamed. "Etude stratigraphique des calcaires du jurassique supérieur dans le Prérif interne : régions de Msila et de Moulay Bou Chta, Maroc." Lyon 1, 1988. http://www.theses.fr/1988LYO11766.
Full textRezqi, Hlima. "Les foraminifères benthiques du néogène supérieur du sillon sud-rifain et du Rif nord-oriental (Maroc) : systématique, paléoécologie, paléobiogéographie." Lyon 1, 1988. http://www.theses.fr/1988LYO10083.
Full textMansour, Majid. "Processus géodynamiques et cartographie des mouvements de terrain dans la région de Chaouene (zone Bouhalla - Amtrasse). Application a la confortation de la route principale n#o39. Rif occidental. Maroc." Paris 7, 1998. http://www.theses.fr/1998PA077099.
Full textArraji, Mohamed. "Le climat du versant méditerranéen du Rif central (Maroc) : une géographie de la pluie, mécanismes pluviogènes et temps pluvieux." Toulouse 2, 1995. http://www.theses.fr/1995TOU20015.
Full textThat research analyses the responsible aerological mecanisms for the rainfall over the mediterranean side of the central rif. This region, covering about 2500 km2, shows changing lanscapes, from the southern middle mountains and the sheltered valleys to the northern lown lands of the mediterranean littoral. It is suffering from the acute dryness which is going on more than six months a year, in general. Using the method of principal components analysis, it appears an important variability in the spatial and temporal distribution of the rain. This is confirmed in the second and third parts, where the different rainfalling systems are studied from the correspondant meteorotypes, satellite images and nephanalysis, during the rainy days of the 1982-83 87-88 period. The results show, also, that the oceanic rains gave the most frequent and abundant contribution. By an another way, the marginal position of the area, in front of the oceanic and mediterranean disturbances, explains the preponderence of the orographic shelter influence as well as the aerologic protection, these rainy occurences
Saïdi, Abdellah. "Contribution à l'étude phytoécologique et morphodynamique du Prérif central (Maroc) : zone de Tissa." Aix-Marseille 3, 1989. http://www.theses.fr/1989AIX30068.
Full textEl, Bouzidi Aïssa. "Vallée moyenne de l'oued Lebène (prérif-Maroc) : étude de cartographie géomorphologique." Poitiers, 1987. http://www.theses.fr/1987POIT5012.
Full textThe geomorphological cartography of the middle regions of the wadi lebene valley made it possible to define a number of forms and formations. A large valley, bordered with numerous terraces, lies in a landscape of low mountains and hills. The disposition on the main types of relief in accounted for by the distribution of structural and lithological patterns. The bioclimatic context is marked by a semi-arid climate ; the high density of rural population is the origin of an almost complete clearing of the soil. The making of the geomorphological map in this uniform and highly dissected environment is essentially based on systematic survey and the interpretation of aerial photographs. The final drafting required the solution of some technical problems and the perfecting of the legend, whose commentary aims at explaining the terminological choices and the different combinations between rubrics. The opposition between the two main geomorphological areas is quite clear. - the area of the low mountains and hills is characterized by a direct influence of structural and lithological patterns, which determine relief contrasts and bring about an important inherited detrital cover whose age is indefinite. - the area of the main valley is marked by the width of the alluvial floor, and the more or less regular terracing. The levels of the terraces are listed in their chronological context. From upstream to downstream, the valley forms two basins linked by a narrow and short gully. The current dynamics shows in complex combinations of processes and forms. The predo- minance of soft grounds, the climatic factors and man's action are at the origin of the great erosion phenomena. However, the important part played by major forms does not rule out the more decisive impact of lateral erosion, though it is often insi- dious. The promoting of anti-erosion measures does not require only technical solu- tions, but also the taking into account of social problems
El, Alami Mohammed. "L'organisation de l'espace agricole dans le Rif méridional central (Maroc) : étude de géographie rurale cartographique." Bordeaux 3, 1990. http://www.theses.fr/1990BOR30018.
Full textThe study in this thesis is concerned principally with the domain of agricultural geography, especialy in the mountain regions of the north of morocco. It consists of an analysis of forms of organisation of agricultural areas in the rif region and the problems that are caused by the carious forms of organisation, and their impact on the society in the central southern rif area. In order to study these of organisation of agricultural areas we have adopted an plan which comprises three separate but integral parts : the first in concerned with the natural milieu, its elements and its main characteristics, as well as its impact on its agricultural organisation and the population and housing distribution. The second part deals with the basis of organisation in this region. It expose firstly the population growth and the reasons for it, as well as the phenomenon of migration and housing in the region. It also discusses the agricultural structures and forms of rural organisation in the area, emphasizing the imbalance between population growth and small-holdings as well as the techniques of soil utilisation. The third part is reserved to study of menagement in the area and the changement of the society, also the methods put into practice
Mouna, Khalid. "Les structures traditionnelles du Rif central (Maroc) entre mutation et résistance : le cas de Ketama." Paris 8, 2008. http://www.theses.fr/2008PA082861.
Full textThis study focuses on the Ketama group. We first present the history of Rif as a social and political unit. Then, we investigate the Ketama group in present time, by analysing its social, ritual, economic and politico-religious structures. We consider these two approaches as necessary in order to understand the dialectic between, resistance and change, traditional and modern structures. Our research deals with the change induced by the culture of kif and its derivatives. With the trade of cannabis and the development of international market, the Ketama traditional structures, that used to be characterized by the solidarity of group, disapeared
Aalouane, Najim. "Caractérisation édaphique et bioclimatique du massif forestier du Jbel Outka (Rif central, Maroc)." Lille 3 : ANRT, 1989. http://catalogue.bnf.fr/ark:/12148/cb37611066r.
Full textDarraz, Chakib. "Tectonique extrusive dans le Rif externe oriental, Maroc le massif paléozoïque du Khebaba /." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37612900j.
Full textDarraz, Chakib. "Tectonique extrusive dans le rif externe oriental (maroc) : le massif paleozoique du khebaba." Toulouse 3, 1988. http://www.theses.fr/1988TOU30124.
Full textAalouane, Najim. "Caracterisation edaphique et bioclimatique du massif forestier du jbel outka (rif central, maroc)." Strasbourg 1, 1988. http://www.theses.fr/1988STR10009.
Full textFollowing an analysis of the components of the natural vegetation upon which are based the methodological choice and orientation of the sampling programme of this study, the edaphic and bioclimatic characteristics of plant groups in the j. Outka massif are individualized through correspondence analysis. The properties and altitudinal range of each landform, together with other secondary topographic variables, are considered as factors of individualization. The various plant groups occur as distinct levels and their organization is properties of their substrate brings out the links between soil and morphogenetic characteristics and the plant groups. However, the factors brought out by this analysis are partly of a general order and partly of a pedological nature and are basically of interest in soil sciences. Plant distribution depends essentially on soil hydric and trophic properties which are function of the nature of each deposit. Clay, bulk density and organic matter are the variables that explain edaphic properties. By intoducing soil volume, the water and mineral reserves at the disposal of plants can be estimated. Correlations are established between these properties and plant groups
Yechouti, Rachid. "Le Rif oriental entre la dynamique économique et l'intervention militaire espagnole, 1893-1921." Toulouse 2, 2001. http://www.theses.fr/2001TOU20092.
Full textChaara, Ahmed. "Paysans pêcheurs et migrants : les campagnes des littoraux du Rif occidental." Aix-Marseille 2, 1990. http://www.theses.fr/1990AIX23A05.
Full textAfsahi, Kenza. "Les producteurs de cannabis dans le Rif - Maroc : étude d’une activité économique à risque." Thesis, Lille 1, 2009. http://www.theses.fr/2009LIL12020.
Full textCannabis cultivation in Rif has extended intensively from 1960s to 2003. This PhD analyses cannabis producers’ practices (both men and women). With both quantitative and qualitative data (including photos and films), the aim is to study their trajectories, their economical and non economical motivations as well as their interactions with the other actors (local and religious authorities). These behaviors and interactions are analyzed through two core concepts : risk and conventions. On the one hand, producers take risks on many levels due to the product illegality. On the other hand, they use the conventions as strategies to minimize the risks of their activity. This research allows us to distinguish several types of producers with different motivations and risk-taking. Among others, we call “leaders” producers who introduce cannabis cultivation in villages, convince other actors to participate, and build a long-term activity. Considering the different areas of culture (old or new areas) help us to compare our hypothesis with different contexts where the know-how, the participation of women, the introduction of cannabis and its perception are not the same. This perspective allows us to address the formation of the market, the marginalization of Rif and the contributions of this cultivation to regional economical and political stability. We also show its drawbacks for local economy and the difficulties that public policies (Moroccan state and international community) face in trying to bring viable solutions
Abbassi, Hassan el. "Essai sur la dynamique des milieux dans le bassin de Boudinar (Rif oriental, Maroc)." Lille 3 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376020256.
Full textEl, Khattabi Jamal. "Démarche méthodologique pluridisciplinaire intégrant une approche transversale pour l'étude des instabilités des versants : application aux versants du Rif Central (Maroc)." Artois, 2001. http://www.theses.fr/2001ARTO0202.
Full textPoujol, Antoine. "Analyse des déformations actuelles dans le Rif (Maroc) : approche morphotectonique." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20105/document.
Full textIn order to identify and quantify the Rif (Morocco) present-day deformation, especially those related to active faults (location, geometry, kinematic), we perform a morphotectonic study. The studied area and faults are located in the Northern part (conjugate faults of Al-Hoceima Bay: Trougout, Boujibar and Rouadi), the Eastern part (Nekor fault) and the Southern part of the chain (Rif frontal thrust between Fes and Meknes cities).Morphotectonic tools (DEMs at different scales, satellite and aerial pictures), field studies and Quaternary dating methods (U/Th, OSL, 14C and in-situ cosmogenic isotopes 10Be, 3He, 36Cl) allow us to characterize transtensional deformation in the Northern Rif. Horizontal and vertical slip rates along the N-S-oriented Trougout major fault are ~1.6 mm/yr and ~2 mm/yr respectively. In the Southern part, the Rif frontal thrust shows a shortening rate of ~1.8 mm/yr into Fes and Meknes area. In the Eastern part, the deformation is focused on the Nekor left-lateral strike-slip major fault with ~1.5 mm/yr. Incision features and raised marine terraces involve an uplift of the chain about ~0.2 mm/yr. The overall deformation in the Rif seems to be continuous since the Messinian-Pliocene time.These new morphotectonic constraints are consistent with the GPS measurements showing southwestward overall motion of most of the Rif belt with respect to stable Africa, associated to clockwise rotation. Finally, we propose a geodynamic model in which the Rif, the Alboran sea and the Betics belong to a single microplate bounded by the strike-slip faults of the Betics on the North, the Rif frontal thrust on the South, the Nekor and TASZ (Trans Alboran Shear Zone) strike-slip faults on the East and North-East, and the western Rif folded structures on the West