The foraminiferal genus Orbitolina in North America Douglass, Raymond C. (Raymond Charles) creator author. Geological Survey (U.S.) issuing body. text bibliography dcu 1960 monographic eng remote 1 online resource (52 unnumbered pages, 14 pages of plates) : illustrations, maps + 3 plates. by Raymond C. Douglass. Title from title screen (viewed September 26, 2014). "A study of the genus Orbitolina, its type species, morphology, and stratigraphic and geographic distribution in North America." Includes bibliographical references (pages 45-50) and index. n------ Foraminifera, Fossil North America Paleontology Cretaceous Cretaceous Geologic Period Foraminifera, Fossil Paleontology North America From 65 to 140 million years ago fast I 19.16:333 I 19.16:333 Foraminiferal genus Orbitolina in North America Douglass, Raymond C. (Raymond Charles). (DLC)gs 60000206 (OCoLC)3863488 Geological Survey professional paper ; 333 https://purl.fdlp.gov/GPO/gpo85578 COP 140929 20211120182624.0 in00003903011 eng