Geology of volcanic and subvolcanic rocks of the Raton-Springer area, Colfax and Union counties, New Mexico /
Scott, Glenn Robert,1918-
Wilcox, Ray E.(Ray Everett),1912-
Mehnert, Harald H.
Washington : U.S. G.P.O.,
1990.
"Descriptions, chemical analyses, and ages for an alkalic sill complex and for mafic feldspathoidal and basaltic effusive rocks."
Includes bibliographical references (p. 57-58).
Volcanic ash, tuff, etc.
Volcanic ash, tuff, etc.
Potassium-argon dating.
Geology
Geology