Icnofósiles, sedimentación episódica, tempestitas fangosas y «black shales» de ambientes seudoanóxicos, en sucesiones marinas de plataforma y rampa

• Autores: José Carlos García Ramos, César Suárez de Centi, Marta Valenzuela Fernández
• Localización: Geogaceta, ISSN 0213-683X, Nº. 12, 1992, págs. 99-100
• Idioma: español
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• Resumen

  • Déposition of blade shale fades on marine shelves and ramps has been habitually attributed to several causes related to oxygen-depleted bottom waters: sea level fluctuations, very slow water circulation, high organic productivity in the surface water; etc. This paper concerns to black shale deposits quickly accumulated on a w e ll oxygenated bottom, devoid o f bioturbation, and related to mud-rich storm events