The Late Cretaceous Ammonites Scaphites Leei Reeside and Scaphites Hippocrepis (DeKay) in the Western Interior of the United States

Characteristic Marine Molluscan Fossils from the Dakota Sandstone and Intertongued Mancos Shale, West-central New Mexico

New and Little-known Ammonites from the Upper Cretaceous (Cenomanian and Turonian) of the Western Interior of the United States

Tarrantoceras Stephenson and Related Ammonoid Genera from Cenomanian (Upper Cretaceous) Rocks in Texas and the Western Interior of the United States: Issue 1473

Ammonites and Some Characteristic Bivalves from the Upper Cretaceous Frontier Formation, Natrona County, Wyoming

Stratigraphy of the Niobrara Formation at Pueblo, Colorado

The Upper Cretaceous Dimorphic Pachydiscid Ammonite Menuites in the Western Interior of the United States: Issue 1533

Ammonites from the Navesink Formation at Atlantic Highlands, New Jersey

Stratigraphic Significance and Petrology of Phosphate Nodules at Base of Niobrara Formation, East Flank of Black Hills, South Dakota

The Ammonite Metengonoceras Hyatt, 1903, from the Mowry Shale (Cretaceous) of Montana and Wyoming: Issue 1787

The Red Bird Section of the Upper Cretaceous Pierre Shale in Wyoming

Stratigraphy and Geologic History of the Montana Group and Equivalent Rocks, Montana, Wyoming, and North and South Dakota

Middle Cretaceous Stratigraphy on the South and East Sides of the Uinta Basin, Northeastern Utah and Northwestern Colorado: Issue 1787

Stratigraphy and Nomenclature of Some Upper Cretaceous and Lower Tertiary Rocks in South-central Wyoming

Stratigraphy and Regional Relationships of a Reference Section for the Juana Lopez Member, Mancos Shale, in the San Juan Basin, New Mexico: The Lithology and Faunal Zonation of a Well-exposed Surface Section are Described, and the Section is Compared with the Abnormally Thin Section at the Type Locality

Stratigraphic Divisions and Geologic History of the Laney Member of the Green River Formation in the Washakie Basin in Southwestern Wyoming: 1972-1973

U.S. Geological Survey Bulletin