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Cours ABG Marges passives

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waterdepth:3500mSalt tectonics : shortening downslopeThrustfront‘Mini-basin’5 km1 SecT.D.29Master1 BGAE Spécialité Géosciences Architecture des Bassins & Géomatique 2008 - Michel SéranneshorteningSalt tectonics at margin scale: section viewEvaporites =décollementSalt tectonics = fonction (slope & load)extensionGabon margin30Master1 BGAE Spécialité Géosciences Architecture des Bassins & Géomatique 2008 - Michel SéranneSalt tectonics at margin scale: map viewEscarpement =Thrust FrontPlatformslope +mini-basinsAbyssalPlainMore info about salt tectonics on:http://homepage.ufp.pt/biblioteca/SaltTectonicsNovo/Pages/Page1.htm#UniversidadeGulf of Mexico31Master1 BGAE Spécialité Géosciences Architecture des Bassins & Géomatique 2008 - Michel SéranneGravity tectonics at margin scale: section viewDecollement on shale interbedsExtensional domainshortening domainOceanic crustNiger DeltaSW5kmNamibia MarginImbricated thrusts at margin toe (shortening domain)NE32Master1 BGAE Spécialité Géosciences Architecture des Bassins & Géomatique 2008 - Michel Séranne8

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