BULL. GEOL. SOC. AM. 



RIO GRANDE 



Over/ym^S^^ 



5ho3/cn?e/f 



rm 



l/mes/ime. 



IH: 

















Ss^ 



_ Exogymrietinc 



? Ip;-??; 



^ Beafs. 



SsS 



•», 



5r^SS:r 



^ 





10 



- — 



3 forttVortfi 

 ^ ffec^s. 



*^ 



¥rT- 



§ Caonna 



''';?'{ 



% 



C^ Comanche 



/.•'•'-^ 



Jy PeaA 





^ 





^ 





^ 





^ Wa/nc/f 





X 





j>^ G/e/iffo^e. 





^ 







COLORADO 



BRAZOS. 



(iVaco 



TRINITY ..'-" (^oms^ 



't ■'DAKOTA. 



Cai'boniferoui 



UNDCRLY/N6 &'i"''«nl 

 rO/fMAT/ON. 



Carboniferous 



"ity. 



VARIATION OF THE COMANCHE 



SERIES BETWEEN T-;cj,(;hita 



EL PASO. 



VOL. 5, 1893, PL. 13, 



tucumcarT 



£\, Plain^ Tertiary 

 -^m Dakota 



AND TRANS-PECOS MOUNTAINS. 



