Thick sedimentary sequences of morrowan age in the ouachita region provide evidence of the northward thrusting of the ouachita belt, and by late morrowan time, the anadarko basin and the criner hills had undergone significant deformation. As part of our ongoing efforts to understand the structure and evolution of the ouachita orogenic belt, we have complied and integrated a wide variety of data to produce a set of crustal scale transects from the continental interior to the gulf coast region. The marathon fold and thrust belt shares many characteristics with the fold and thrust belt in the ouachita salient (figs This represents predominantly north to northwest contraction. The thrust belt is interpreted to have formed as a result of the progressive collision of the south american.
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