Map showing distribution, composition, and age of Late Cenozoic volcanic centers in Idaho, western Montana, west-central South Dakota, and northwestern Wyoming
|Main Author:||Luedke, Robert G.|
|Other Authors:||Smith, Robert L., 1920-|
Reston, Va. :
U.S. Geological Survey,
6 maps on 2 sheets : color ; 89 x 107 cm., or smaller, folded in envelope 30 x 24 cm.
Miscellaneous investigations series (Geological Survey (U.S.)) ;