Geochemistry and geochronology of Middle Tertiary volcanic rocks of the Central Chiricahua Mountains, Southeast Arizona /
Du Bray, E. A.
Snee, Lawrence W.
Pallister, John S.
Geological Survey (U.S.)
Reston, Va : U.S. Geological Survey ; Denver, CO : Information Services [distributor],
2004.
Includes bibliographical references (p. 54-57).
Volcanic ash, tuff, etc.
Geological time
Geochemistry