01319cam a2200313 4500 gs 64000357 DLC 20260227111415.0 700727s1962 aruab b 000 0 eng c gs 64000357 U.S. Geological Survey Library DLC DLC n-us-ar QE87 .A3 no. 22 TN490.U7 S95 Copy 2. 557.67/08 s Swanson, Vernon Emanuel, 1922- Geology of a uranium-bearing black shale of Late Devonian age in north-central Arkansas, by Vernon E. Swanson and Edwin R. Landis. [Little Rock] Arkansas Geological and Conservation Commission, 1962. v, 16 p. illus., map. 28 cm. Arkansas. Geological and Conservation Commission. Information circular no. 22 "Prepared by the U.S. Geological Survey in cooperation with the Arkansas Geological and Conservation Commission." Bibliography: p. 15-16. Geology, Stratigraphic Devonian. Black shales Arkansas Marion Co. Uranium Arkansas Marion Co. Landis, Edwin R. (Edwin Robert), 1926- joint author. Geological Survey (U.S.) Information circular (Arkansas Geological Commission) ; 22. 29917 29917