Stratigraphic notes, 1994 - United States Geological Survey (Reston, Va. : Dept. of the Interior, U.S. Geological Survey ; Denver, Colo. : For sale by U.S. Geological Survey, Information Services)
Previously classed: I 19.3
Shipping list no.: 96-0055-P.
Issue: 1994.
Description based on: 1985-86.
Keywords: Geology, Stratigraphic -- Nomenclature; Geology, Stratigraphic -- Nomenclature -- United States