NO. 7 



EARLY CENOZOIC VERTEBRATES — FRIES ET AL 



erence being given to the Guanajuato area because of its relatively 

 large extent. 



The Instituto de Recursos Minerales provided the services of 

 Gustavo Ortiz as a geologic assistant to Edwards in the summer of 



Red conglomerote 

 locality 



f \ / kj J S A N \ '• 





, L U i S'^o 



■^.,v 



A. 



COLIMtf 



100 



-■^ .>oyaGS\ ; r 



~T''^pnEpiTEgC7p~o^'o"si ) ^ 



'> 

 .> 





500 Kilometers 

 I 



Approximote scole 



+ ) V-.' "^ V-j' 



Fig. I. — A few early Cenozoic red conglomerate localities in Mexico. 



1950. Major effort was directed to the red conglomerate outcrop area 

 in the Guanajuato district, with the principal objectives of learning 

 the depositional environment of the conglomerate and searching for 

 fossil reinains. This search was rewarded by the discovery of some 

 bone fragments in silty beds in the lower part of the conglomerate, 



