00980cam a22002651 4500 gs 21000073 DLC 20260227111325.0 770426s1920 vauabf s000 0 eng c gs 21000073 (OCoLC)2918117 U.S. Geol. survey. Library NAlfC DLC premarc QE173 .A2 no. 20 557.55 Ries, Heinrich, 1871-1951. The clays and shales of Virginia west of the Blue ridge, by H. Ries and R. E. Somers. Charlottesville, University of Virginia, 1920. vii, 3, 118 p. illus., XIV pl. (incl. map in pocket) tables, diagrs. 26 cm. Virginia. Geological survey. Bulletin no. 20 At head of title: Virginia Geological survey. University of Virginia. Thomas Leonard Watson, director. Clay Virginia Shale Somers, Ransom Evarts, 1885- joint author. 26070 26070