The Los Tuxtlas Volcanos are an aberration on Mexico´s Gulf Coastal Plain. The
volcanoes are separated from the nearest volcano in the belt running across the
spine of Mexico  to the west by about 230 km, and from the Central American
Volcanic Belt to the southeast by over 300 km.

The Tuxtlas have drawn attention because of this anomalous setting and because it
contains San Martin Tuxtla Volcano, one of Mexico´s historically active volcanoes.

The eruptions creating Los Tuxtlas apparently bridged  two geological ages, with
most of the Sierra de Santa Marta having been dated to the Pliocene (app. 5-2 million
years ago), with an overlay of the San Martin volcanoes having been dated to the
late Pleistocene, beginning app.  2 million years and lasting to the present.

The last certified volcanic eruption occured in 1793.

There are dozens of named volcanoes in Los Tuxtlas, best known are San Martin
Tuxtla, Cerro Santa Marta, San Martin Pajapan and El Vigia.

Their height seems to be an absolute puzzle. My last aeronautical chart shows San
Martin at 5701 feet, that´s 1737 meters,
INEGI says 1680m, CONANP 1650m,
PROFEPA 1764m &  IBUNAM 1700m. I´ll stick to my pilot settings.

More information on specific volcanoes are contained in the
Sierra de Los Tuxtlas
section, including San Martin Tuxtla, Santa Marta, S.M. Pajapan, etc.
Volcanoes of  Los Tuxtlas, Veracruz

Introduction to Los Tuxtlas Volcanoes