01744cam a22003011  4500001001300000003000400013005001700017008004100034010001700075040004800092043001200140050002400152051001600176110003200192245001400224260004800238300009400286500005000380505072300430650002301153650002801176650003801204650002801242700003601270700005701306700003801363700004101401gs 23000260 DLC20260227111327.0870529s1923    mduabf        000 0 eng c  ags 23000260   aU.S. Geol. Survey. Libr./ICUcICUdICUdDLC  an-us-md00aQE121b.A215 vol. 8  aQE661b.M352 aMaryland Geological Survey.10aSilurian.  aBaltimore,bThe Johns Hopkins press,c1923.  a794 p.billus., LXVII pl. (incl. fold. col. map; fold. col. diagr.) maps, tables.c26 cm.  aAt head of title: Maryland Geological survey.0 aGeologic relations and geographic distribution of the Silurian strata of Maryland, by C.K. Swartz.--Stratigraphic and paleontologic relations of the Silurian strata of Maryland, by C.K. Swartz.--Sections of the Rose Hill and McKenzie formations, by W.F. Prouty and C.K. Swartz.--Sections of the Wills Creek and Tonoloway formations, by C.K. Swartz.--Correlation of the Silurian formations of Maryland with those of other areas, by C.K. Swartz.--American Silurian formations, by E.O. Ulrich and R.S. Bassler.--Paleozoic ostracoda: their morphology, classification, and occurences, by E.O. Ulrich and R.S. Bassler.--Systematic paleontology of Silurian deposits, by C.K. Swartz, W.F. Prouty, E.O. Ulrich and R.S. Bassler. 0aGeologyzMaryland. 0aPaleontologyzMaryland. 0aGeology, StratigraphicySilurian. 0aPaleontologyySilurian.1 aSwartz, Charles Kephart,d1861-1 aProuty, William F.q(William Frederick),d1879-1949.1 aUlrich, Edward Oscar,d1857-1944.1 aBassler, Ray S.q(Ray Smith),d1878-