This publication describes the geology of about 182 square miles in Johnson, Logan, and Franklin Counties in northwestern Arkansas. Also, information is provided pertinent to the exploitation of mineral resources in the study area, particularly coal, natural gas, building stone, crushed stone, sand and gravel, and clay.

It includes:

• Lithologic descriptions of the formations in the study area
• Stratigraphic chart displaying the formations
• Table describing wells in the study area
• Table of 190 shallow holes drilled by Gulf Oil Corp. in the study area
• Thickness of the Atoka Formation in the study area from selected wells
• An analysis of shale from the McAlester Formation
• Table of estimates of coal reserves in the study area
• Colored geologic map of the study area in pocket
• Correlation of stratigraphic sections and e-logs of wells in the study area in pocket
• Map showing structure contours, coal beds, and gas fields in the study area in pocket
• Four cross-sections in the study area in pocket

*Includes: 27 pages, 4 plates, 2 figures, 5 tables

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