--> ABSTRACT: Fold-Thrust Deformation along Portions of the Arbuckle Thrust System and Frontal Wichitas, Southern Oklahoma, by C. P. Saxon; #91021 (2010)

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Fold-Thrust Deformation along Portions of the Arbuckle Thrust System and Frontal Wichitas, Southern Oklahoma

SAXON, CHRISTOPHER P.

The Arbuckle Anticline is a basement-involved foreland structure. Near its central portion, where the greatest shortening has occurred, the Arbuckle Anticline is a complex fault-bend fold. However, as it plunges to the southeast and northwest and progressively loses slip, the Arbuckle Anticline exhibits fold-thrust style deformation. Timing of the formation of synclinal crowd features is constrained by their relationship to preserved synorogenic sediments. Along the southeastern plunge, early stages of folding resulted in the formation of subsidiary structures up the steep flank and shallow flank of the fore-limb syncline. Thrusts along the steep flank created a paleo-topographic high which ponded synorogenic sediments of the Collings Ranch Conglomerate as they were being shed from the Arbuckle Anticline. Subsequent shortening occurred as slip along the Arbuckle Thrust and imbricates resulting in the gentle folding and dissection of the Collings Ranch basin. An apparent normal fault visible in surface exposure is an overturned thrust fault on the overturned fore-limb of the Arbuckle Anticline. Along the northwestern flank of the Arbuckle Anticline an overturned footwall syncline developed. Crowding from northeast-directed shortening along the Arbuckle Thrust and southwest-directed shortening along the oppositely verging Mill Creek Fault System created the Eola Anticline. Similar relationships between structural position and structural style are observed and documented in the frontal zone of the Wichita Uplift.

AAPG Search and Discovery Article #91021©1997 AAPG Annual Convention, Dallas, Texas.