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- W2000256557 abstract "Abstract We document a rare example of deep-marine siliciclastic environments associated with a transition from lower-slope erosional channel/canyon to proximal basin-floor channel–levee–overbank environments from the Middle Eocene deep-marine Banaston System (Upper Hecho Group), Ainsa Basin, Spanish Pyrenees. The base and top of the Banaston System are defined by angular unconformities; the margins show pinch-out onto hemipelagic slope mudstones or sidelap onto canyon walls. The Banaston System comprises six lower-slope erosional channel/canyon fills with an ~ 520 m cumulative thickness that correlate with six linked proximal basin-floor, laterally offset-stacked low-sinuosity, coarse-grained, channel–levee–overbank complexes (BI–BVI) totalling ~ 700 m cumulative thickness in the lower slope setting. The younger Banaston IV, V and VI sandbodies (BIV–VI) show less confinement and overspill the more aerially restricted older parts of the Banaston System. About 3 km farther NW into the Ainsa Basin, the BI–VI sandbodies are less confined, and laterally offset-stacked towards the WSW in increments of ~ 1 km; they are interpreted as channel–levee–overbank complexes in a proximal basin-floor setting. The base of each complex is defined by a MTD/MTC comprising coarse-grained deposits and characterised by pebbly mudstones. The Banaston System is an example of a deep-marine, sand-prone, lower-slope and proximal basin-floor transition that shows the importance of the interplay between depositional control on sand accumulation (e.g., MTDs/MTCs), erosional confinement within lower-slope channels, a tectonically-driven mobile slope and syn-sedimentary seafloor growth structures, in controlling the lateral migration of channels away from the deformation front. We document these 3-D relationships and discuss the transport, deposition and tectonic processes responsible for the thickest turbidite sandstone accumulation in the Ainsa Basin." @default.
- W2000256557 created "2016-06-24" @default.
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- W2000256557 date "2015-05-01" @default.
- W2000256557 modified "2023-09-25" @default.
- W2000256557 title "Transition from deep-marine lower-slope erosional channels to proximal basin-floor stacked channel–levée–overbank deposits, and syn-sedimentary growth structures, Middle Eocene Banastón System, Ainsa Basin, Spanish Pyrenees" @default.
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- W2000256557 doi "https://doi.org/10.1016/j.earscirev.2014.11.015" @default.
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