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Tectono-Stratigraphic Evolution of the Southern Midcontinent Margin

T. A. (Mac) McGilvery

AAPG Midcontinent 2021

Wednesday-Friday, October 6th-8th

 Arkoma Basin, Upper Paleozoic Cross Section

First Announcement:

The tectonostratigraphic fill of the Arkansas Arkoma Basin, a 3-day 2-night trip led by T. A. (Mac) McGilvery, Univ. of Arkansas Geosciences.

Day 1: Will illustrate the Morrow and Lower Atoka along I-49 south of Fayetteville as a shallow marine succession deposited across the Northern Arkansas Structural Platform that predated the Arkoma Foreland Basin. The stratigraphic succession was highly influenced by eustatic sea-level change.

Day 2: Will illustrate the Middle Atoka as a complex shallow to deep marine fill of the early foreland basin phase dominated by subsidence with an elevated sediment supply. Day 3 will illustrate the Upper Atoka and Desmoinesian as the transition to axial, fluvial/deltaic fill of the late foreland basin dominated by sediment supply.

The trip is proposed as a post conference trip departing on the morning of Wednesday, Oct 6 and returning the late afternoon of Friday Oct. 8. An optional happy hour and introductory lecture is being considered for the Tuesday evening before. Accommodation for both nights will be arranged in the area of Russellville Arkansas. Maximum occupancy 20 participants.

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