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Core Workshop (Dec 5): Depositional Systems and Architectural Variability of the Wilcox Group in Texas

William Ambrose, Iulia Olariu, Jinyu Zhang (BEG)


Cornel Olariu, Ronald Steel, Department of Geosciences

Wednesday, December 5th, 2018, 9:00 a.m. - 3:00 p.m.

Location: Core Research Center at J. J. Pickle Research Campus, 10100 Burnet Road Building 131; Austin, Texas 78758; (512) 475-9561

Presented by: The University of Texas at Austin, Bureau of Economic Geology, State of Texas Advanced Oil and Gas Resource Recovery (STARR) Program and the Department of Geosciences

Attendance limited to 40 participants (no registration fee) (Includes morning refreshments and lunch plus presentations on CD and handouts)

To register please contact: John Berry; sign up sheets will be at the next AGS meeting

This all-day workshop is an in-depth study of Wilcox Group stratigraphy and depositional systems in Texas based on detailed analysis of more than 1000 well logs and about 900 km2 of 3D seismic data. Attendees will receive a hands-on view of 5 key cores with an extensive review of depositional environments – fluvial, deltaic (wave, tidal and fluvial processes) and upper slope facies. Core descriptions, cross sections and lithofacies maps document temporal and spatial variations in shoreline processes from wave-modified and tide-influenced to wave-dominated deltas and indicate that significant volumes of sandstone were trapped on the outer shelf by contemporaneous growth faults. However, at times the Wilcox shelf margin prograded through mud accretion. Mud-rich shelf to slope transitions documented from cores and seismic data show that significant basin margin progradation can occur in the absence of coarse-grained sediment.

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