01018cam a2200253 4500 gs 68000248 DLC 20260227111422.0 700508s1967 nmuab b 00010 eng c gs 68000248 //r90 U.S. Geological Survey Library DLC DLC QE672 .A67 551.7/51 Armstrong, Augustus K. Biostratigraphy and carbonate facies of the Mississippian Arroyo Peñasco Formation, north-central New Mexico, by Augustus K. Armstrong. Socorro, State Bureau of Mines and Mineral Resources, New Mexico Institute of Mining and Technology, 1967. 79 p. illus. (2 fold. in pocket), maps. 29 cm. 3.50 New Mexico. Bureau of Mines and Mineral Resources. Memoir 20 Bibliography: p. 78-79. Geology, Stratigraphic Mississippian. Geology New Mexico. Memoir (New Mexico. Bureau of Mines and Mineral Resources) ; 20. 30474 30474