Lower Eocene red-clay sedimentation on the George Bligh/Rockall Channel |
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| Authors: | A Ferragne C Latouche M Parra |
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| Institution: | (1) Cours de la Libération, Institut de Géologie du Bassin d'Aquitaine-351, 33405 Talence Cedex, France |
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| Abstract: | Core 7710, recovered on the George Bligh/Rockall Channel, is composed of fine grained ocher-colored sediments rich in ferriferous smectite (montmorillonite, beidellite). These sediments were deposited during early Eocene in a shallow marine environment. Their mineralogic, chemical and isotopic constituents indicate subaerial weathering of lower Eocene intermediate igneous rocks (ferrodiorite, marscoiite) eroded from the still-emergent George Bligh and Rockall Banks. Lack of any post Eocene Sediments may be due to major morphologic and hydrologic changes forming sedimentation gaps. |
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