Space-time relations of Cenozoic silicic volcanism in the Great Basin of the western United States Armstrong, R. L. ; Ekren, E. B. ; McKee, E. H. ; Noble, D. C. Abstract Publication: American Journal of Science Pub Date: April 1969 DOI: 10.2475/ajs.267.4.478 Bibcode: 1969AmJS..267..478A