■D. S. GEOLOGICAL SURVEY 



MONOGRAPH 65 PLATE II 



A. OJO ALAMO, SAN JUAN COUNTY, N. MEX., LOOKING NORTH 

 Contadl (indicated by arrows) betw^een Ojo Alamo sanditone and clay of Puerco formation is observed dire(5tly back of the 



trading store 



EjJqc 



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;i. EXPOSURES OF PUERCO FORMATION EAST OF OJO ALAMO, N. MEX. 

 sfts on eroded surface of Ojo Alamo sandftones; contaiS: indicated by dotted line. The dark Stratum at top to the right is the lower 

 level i^£tocoyiu.s 2:one) of the Puerco formation 



CRETACEOUS AND BASAL EOCENE CONTACTS IN NEW MEXICO 



Photographs by W. J. Sinclair,'1913. (After Sinclair>nd Granger, 1914.1) 



