A map, scale 1 in. to 15 mi., shows a structural interpretation of the Ouachita-Arbuckle junction in SE Oklahoma-NE Texas. Data from wells have made possible the mapping of the southeastern extent of the Arbuckle element. A major tectonic event involved large-scale tear faulting, wherein a deformed Ouachita prism was moved northwestward relative to the Arbuckle mass.

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