High-silica sandstone and conglomerate on Pine Mountain near Elkhorn City, Kentucky McGrain, Preston 1917- creator Crawford, Thomas J. joint author. text bibliography kyu Lexington 1959 monographic eng
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5 l. map, tables. 28 cm. [by] Preston McGrain and Thomas J. Crawford. Cover title. "Suggested references": leaf 5. n-us-ky Silica Sandstone Kentucky Pine Mountain Conglomerate QE115 .K417 no. 1, 1959 Information circular (Kentucky Geological Survey) ; Ser. X, 1 gs 59000101 //r942 U.S. Geol. Survey Lib. 770719 20260227111407.0 gs 59000101