Imlay, Ralph W.

JURASSIC (OXFORDIAN AND LATE CALLOVIAN) AMMONITES FROM THE WESTERN INTERIOR REGION OF THE UNITED STATES: PROFESSIONAL PAPER 1232

Washington, DC: United States Geological Survey/USGS/Government Printing Office/GPO, 1982. Soft cover. Item #46162

Marine Waters invaded Montana in late Callovian time, advanced southward across Wyoming in early Oxfordian time and persisted in Montana during late Oxfordian time. 44 pages with map, tables, references and index, plus the twenty-six plates bound in the rear. Bound in original tan stiff paper covers with printing in dark brown. New Mexico Bureau of Mines stamp on the front cover. A near fine copy.

Price: $20.00