UNITED STATES DEPARTMENT OF THE INTERIOR 

 GEOLOGICAL SURVEY 



UNIVERSIOAO NACIONAL AUTONOMA DE MEXICO 

 INSTITUTO DE GEOLOGIA, GEOFISICA Y GEODESIA 



Scdimantify rocks 



Sedimentary rocks 



OomtnantJy not metamorphosed 

 Oomlnantty metamorphosed 



Pre-Mesojotc rocks 



*H 



CSD 



Faults 



hactuirvd oa downtfvwo MM 



Volcanoes 

 Ve*> acova. oc * 



^ 



Structure contours 

 ( Wore or ta . 



IOOO /Ml. ;l 



( iMf'uii j peninsula 



Ifti.m iti l.\i;uui,r 

 Airiuf oJcW Mmozdjc ohm 



Fig. 28.1. Tectonic map of northern Mexico. Reproduced from P. B. King, 1942b. 



