Lower Stanley Shale and Arkansas Novaculite, western Mazarn Basin and Caddo Gap, Ouachita Mountains, Arkansas
Jay Zimmerman, James Timothy Ford, 1988. "Lower Stanley Shale and Arkansas Novaculite, western Mazarn Basin and Caddo Gap, Ouachita Mountains, Arkansas", South-Central Section of the Geological Society of America, O. T. Hayward
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Elements of the sedimentology and structural geology of two of the most prominent lithologic units in the Arkansas Ouachitas, the Arkansas Novaculite (Devonian-Mississippian), and the Stanley Shale (Mississippian), are illustrated along a 6.1 mi (9.8 km) highway traverse between the village of Glenwood and Caddo Gap, Arkansas. The outcrops described below serve as an introduction to the two broad facies groups present in the Ouachita Mountains and to the structural style that dominates major parts of the range.