MULTINODOSE SCAPHITID CEPHALOPODS FROM THE LOWER PART OF THE PIERRE SHALE AND EQUIVALENT ROCKS IN THE CONTERMINOUS UNITED STATES; CONTRIBUTIONS TO PALEONTOLOGY; GEOLOGICAL SURVEY PROFESSIONAL PAPER 483-E
Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1964. Soft cover. Three species of ammonites, assigned to the new genus Trachyscaphites, provide a means for the correlation of Upper Cretaceous strata between the Western Interior, the Gulf Coastal Plain, and Europe. 13 pages with tables and references, plus four photographic..... More