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GEOLOGIC MAP OF THE WITTS SPRINGS QUADRANGLE, SEARCY COUNTY, ARKANSAS
The map graphically summarizes the surface geology of the Witts Springs 7.5-minute quadrangle. In this area over 1240 feet of late Mississippian to early Pennsylvanian age carbonate and clastic sedimentary rocks are exposed. The area lies on the northern edge of the Boston Mountains Plateau, the highest plateau on the southern flank of the Ozark Mountain dome which is centered in southeast Missouri. The major drainages in this area are Bear Creek and Calf Creek which both flow north and eventually into the Buffalo River. The type section for the Witts Springs Formation is located in the headwaters of Calf Creek, with the chief reference section in a small tributary to Richland Creek on the western edge of the mapped area. The Imo formation that was proposed by Gordon, but subsequently abandoned by the U.S. Geological Survey Geologic Names Committee in 1963, had its type section in Sulphur Springs Hollow, a tributary to Bear Creek in the southeastern quadrant.
The geology of this quadrangle was mapped in 1965 by E.E. Glick and S.E. Frezon as part of the 15-minute Snowball quadrangle. This same 15-minute area was also mapped chiefly from aerial photography in 1972 by Boyd Haley for the Geologic Map of Arkansas. The current map is the first to be mapped on the ground at the 1:24,000 scale and builds on the previous work while using a revised stratigraphy and adding certain stratigraphic refinements and structural details. The contacts and structural features on the map were derived from direct field observations at numerous sites. Site locations were generated with the aid of a global positioning satellite receiver. Bedrock dipping at less than 2° was considered horizontal.
The map is accessible through the Arkansas Geological Surveys Website: http://www.state.ar.us/agc/wittsspring.pdf.