The outcrops along Interstate 35 here display the south flank of the Arbuckle anticline (rocks dip at about 40 degrees). Many types of Paleozoic fossils can be found from the weathering of the limestone including brachiopods, gatropods, crinoids, and trilobites.
References
Page 150 - Dicka, A. B., 2012, 101 American Geo-sites you've gotta see: Mountain Press Publishing Co., 250p.
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