Transverse Volcanic Axis

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Transverse Volcanic Axis

 

the southern edge of the Meseta Central in Mexico. It is 800 km long and from 50 to 100 km wide. Divided by faults, it has a ridge of volcanoes, of which the largest are the Pico de Orizaba (5,700 m) and Popocatépetl (5,452 m). Earthquakes are frequent. In the lower zone (to 1,000 m) there are tropical forests of sclerophyll oaks, myrtles, laurels, and arborescent ferns. Between 1,000 and 2,000 m there are mixed forests of deciduous oaks, lindens, and pines, and in the 2,000 to 4,000 m zone, pine and fir forests. At higher elevations there are subalpine and alpine meadows; the peaks of the largest volcanoes are covered with snow. Mexico City is situated at the foot of the Transverse Volcanic Axis.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.