LEADER 02314oam 2200625 450 001 9910709705603321 005 20180718085818.0 035 $a(CKB)5470000002473195 035 $a(OCoLC)896811399 035 $a(OCoLC)995470000002473195 035 $a(EXLCZ)995470000002473195 100 $a20141123d1987 ua 0 101 0 $aeng 135 $aurbn||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aSome Middle Cenomanian (Upper Cretaceous) Acanthoceratid Ammonites from the western interior of the United States /$fby William A. Cobban 210 1$aWashington :$cDepartment of the Interior, U.S. Geological Survey,$d1987. 215 $a1 online resource (iv, 28 pages) $cillustrations, maps 225 1 $aU.S. Geological Survey professional paper ;$v1445 300 $a"Ammonites of the genera Calycoceras, Acanthoceras, Plesiacanthoceras, and Protacanthoceras from the Frontier Formation and equivalent rocks are described and illustrated." 300 $aAlso available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/). 320 $aIncludes bibliographical references (pages 24-26) and index. 517 $aSome Middle Cenomanian 606 $aAcanthoceratidae$zFrontier Formation 606 $aAmmonoidea$zFrontier Formation 606 $aPaleontology$yCretaceous 606 $aPaleontology$zUnited States 606 $aAcanthoceratidae$2fast 606 $aCretaceous Geologic Period$2fast 606 $aPaleontology$2fast 607 $aUnited States$2fast 615 0$aAcanthoceratidae 615 0$aAmmonoidea 615 0$aPaleontology 615 0$aPaleontology 615 7$aAcanthoceratidae. 615 7$aCretaceous Geologic Period. 615 7$aPaleontology. 700 $aCobban$b William A.$f1916-2015,$01390881 712 02$aGeological Survey (U.S.), 801 0$bCOP 801 1$bCOP 801 2$bOCLCO 801 2$bOCLCF 801 2$bTRAAL 801 2$bCUS 801 2$bTRAAL 801 2$bOCLCA 801 2$bGPO 906 $aBOOK 912 $a9910709705603321 996 $aSome Middle Cenomanian (Upper Cretaceous) Acanthoceratid Ammonites from the western interior of the United States$93524964 997 $aUNINA