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Abstract

Paleogene stratigraphy of the northern Gulf of Mexico abyssal plain was revised using baselap surfaces that define major depocenter shifts. Age and lithologic control was provided by ties to wells in the Perdido fold belt. The three major Paleogene units, named for coeval units in Texas and Louisiana, are Wilcox-Midway (WM), Vicksburg-Jackson-Claiborne (VJC), and basal Miocene-Anahuac-Frio (BMAF). Late Laramide (Paleogene-lower Eocene) Wilcox submarine fans were sourced from the north, west, and northwest; each of three subunits has a different depocenter. The VJC submarine fan depocenter (middle Eocene to lower Oligocene) reflected sediment influx from post-Laramide uplift in Mexico and simultaneous sediment starvation from Texas and Louisiana. BMAF depocenters (middle Oligocene to lowermost Miocene) indicated a return to sediment input from the north and northwest. Deformation of the Perdido foldbelt began during BMAF time, following deposition of the Frio fan.

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