1. ⁴⁰Ar/³⁹Ar ages of some Challis Volcanic Group rocks and the initiation of Tertiary sedimentary basins in southwestern Montana Author/Creator: M'Gonigle, John W. Publication/Creation: Washington : U.S. G.P.O. ; Denver, CO : For sale by the U.S. Geological Survey, Information Services, 1996 Resource Type: Book Access & Availability: Loading
2. ⁴⁰Ar/³⁹Ar and K-Ar geochronology and tectonic significance of the Upper Cretaceous Adel Mountain volcanics and spatially associated Tertiary igneous rocks, northwestern Montana Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2005 Resource Type: Book Access & Availability: Loading
3. Abandonment of the name Hartford Hill rhyolite tuff and adoption of new formation names for middle Tertiary ash-flow tuffs in the Carson City - Silver City area, Nevada Author/Creator: Bingler, Edward C., author Publication/Creation: [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1978 Resource Type: Book Access & Availability: Loading
4. The Accotink schist, Lake Barcroft metasandstone, and Popes Head Formation--keys to an understanding of the tectonic evolution of the northern Virginia Piedmont Author/Creator: Drake, Avery Ala, 1927- Publication/Creation: For sale by the Branch of Distribution, U.S. Geological Survey Resource Type: Book Access & Availability: Loading
5. The Accotink schist, Lake Barcroft metasandstone, and Popes Head Formation--keys to an understanding of the tectonic evolution of the northern Virginia Piedmont Author/Creator: Drake, Avery Ala, 1927- author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1981 Resource Type: Book Access & Availability: Loading
6. Additions to the flora of the Wilcox group Author/Creator: Berry, Edward Wilber, 1875-1945, author Publication/Creation: [Washington] : [Department of the Interior, United States Geological Survey], [1923] Resource Type: Book Access & Availability: Loading
7. After a century : revised Paleogene coal stratigraphy, correlation, and deposition, Powder River Basin, Wyoming and Montana Publication/Creation: Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2010 Resource Type: Book Access & Availability: Loading
8. After the Australopithecines : stratigraphy, ecology, and culture change in the Middle Pleistocene Publication/Creation: The Hague : Mouton, [1975] Resource Type: Book Edition: Reprint 2011 Access & Availability: Loading
9. Age and correlation of California Paleogene benthic foraminiferal stages Author/Creator: Poore, Richard Z. Publication/Creation: Washington : U.S. Govt. Print. Off, 1980 Resource Type: Book Access & Availability: Loading
10. Age and correlation of California Paleogene benthic foraminiferal stages Author/Creator: Poore, Richard Z., author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1980 Resource Type: Book Access & Availability: Loading