This map is the third, in a series of three, that depicts the surface geology of the north Arkansas zinc and lead region. The region is divided into two major focus areas: the north-central district and the Northeast district. The larger north-central district is further split into two focus areas: western part and eastern part. The eastern part of the north-central district comprises portions of four 7.5-minute series topographic quadrangles including the Cotter, Cotter NW, Cotter SW, and Peel. The eastern part of the north-central district spans the Springfield and Salem Plateaus of the Ozark Plateaus Province. Approximately 800 feet of Lower Ordovician to Upper Mississippian carbonate and clastic rocks are exposed in this area.

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