Fig. 43.1. Tectonic map of southern Mexico and Central America. Compiled from Roberts and 



Irving (1957), de Cserna (1958), Terry (1956), and Geological Map of Mexico, I. G. C. (1956). 



,., For distribution of Tertiary volcanic rocks in southern Mexico see Fig. 32.8. Southern Guate- 



mala, El Salvador, southern Honduras, central and southern Nicaragua, Costa Rica, and Panama 

 are nearly all covered by Cenozoic volcanic rocks. B.H., British Honduras. 



