| Summary: | X Congreso Geológico de España, 5-7 de julio 2021, Vitoria-Gasteiz.-- 1 page [EN] The Cenozoic seismic stratigraphy of the northern Argentine continental slope, off Bahia Blanca is characterized by five major seismic boundaries, B1 to B5 (from oldest to youngest) bounding six units: I (Eocene), II (Oligocene to early Miocene), III (middle Miocene), IV (late Miocene), V (Pliocene), and VI (Quaternary). These units are make-up of mass-flow deposits, (hemi)pelagites or low-density flows, contourite drifts and moats, sediment waves, and canyon deposits. The depositional architecture of deposits show the progressive decreases of mass-flow deposits and (hemi)pelagites or low-density flows from Eocene to middle Miocene, and the dominance of contourites through time, which is accompanied by an upslope lateral relocation of their deposits and features becoming ubiquitous during the late Miocene to Quaternary. The depositional stratigraphic architecture allow us to divide the sedimentary history into three major periods, Eocene to Early Miocene; Middle Miocene; and Late Miocene to Recent, governed by palaeoceanographic changes in the Southern Component Deep Water (SCDW). These changes are related to palaeogeodynamic, regionally related to variations in the Andean orogeny and remotely related to the opening stages of the Drake Passage (Antarctica) and closure of the Central American Seaway [ES] La estratigrafía sísmica cenozoica del talud continental norte argentino, frente a Bahía Blanca, comprende cinco discontinuidades estratigráficas principales, B1 a B5 (de la más antigua a la más joven) que limita seis unidades: I (Eoceno), II (Oligoceno a Mioceno temprano), III (Mioceno medio), IV (Mioceno tardío), V (Plioceno) y VI (Cuaternario). Estas unidades están formadas por depósitos de flujo en masa, (hemi)pelagitas o flujos de baja densidad, crestas y surcos contorníticos, ondas de sedimento y depósitos de cañón. La arquitectura deposicional muestra una disminución progresiva de los depósitos de flujo en masa y ...
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