00980cam a22002651  4500001001300000003000400013005001700017008004100034010001700075035001900092040004400111042001200155050002200167082001100189100003200200245009100232260005300323300008200376490005200458500010900510650001900619650001000638700004900648999001700697gs 21000073 DLC20260227111325.0770426s1920    vauabf       s000 0 eng c  ags 21000073   a(OCoLC)2918117  aU.S. Geol. survey.  LibrarycNAlfCdDLC  apremarc00aQE173b.A2 no. 20  a557.551 aRies, Heinrich,d1871-1951.14aThe clays and shales of Virginia west of the Blue ridge,cby H. Ries and R. E. Somers.  aCharlottesville,bUniversity of Virginia,c1920.  avii, 3, 118 p.billus., XIV pl. (incl. map in pocket) tables, diagrs.c26 cm.0 aVirginia.  Geological survey.  Bulletinvno. 20  aAt head of title: Virginia Geological survey.  University of Virginia.  Thomas Leonard Watson, director. 0aClayzVirginia 0aShale1 aSomers, Ransom Evarts,d1885-ejoint author.  c26070d26070