Ancient Civilizations of Mexico and Central America

Plate I

In southern Mexico the plateau area enclosed between the principal sierras narrows perceptibly, because the shore line of the Pacific and the mountain range that parallels it swing more and more towards the east. At the Isthmus of Tehuantepec a low valley separates the highland area of Mexico from that of Central America. This second table-land is not so wide as the one we have just considered and is more deeply dissected by rivers. The mountains of Guatemala rise to a considerable altitude, the highest being Tacaná with 13,976 feet elevation. Active volcanoes are numerous and earthquakes frequent and often disastrous. The Volcan de Agua and the Volcan de Fuego (Volcano of Water and Volcano of Fire) look down upon Ciudad Vieja and Antigua Guatemala, the old Spanish capitals which each in turn destroyed. The cordillera still presents its most abrupt front to the Pacific and on the eastern side, in Guatemala and Honduras, there are high forest-bearing ridges between the river systems. The Cockscomb Mountains in British Honduras are a low outlying group. In southern Nicaragua the main chain is broken by a low broad valley that extends from ocean to ocean. In Costa Rica and Panama a single range stretches midway along the narrow strip of land, with peaks that rise above 11,000 feet.

The lowland strip on the Pacific side of our area is a narrow fringe. Like the central plateau it is for the most part arid, but irrigation makes it productive. The lowlands of the Atlantic side are generally wet and heavily forested. The greatest land mass of uniformly low elevation is the Peninsula of Yucatan. In eastern Honduras and Nicaragua there are extensive river valleys of low elevation.

The river systems of Mexico and Central America flow into the two bounding oceans or into lakes which have no outlets. Several closed basins occur on the Mexican table-land. The Rio Nazas and the Rio Nieves flow into salt marshes in the northern state of Coahuila. But the most important interior basin is the Valley of Mexico. In this mountain enclosed valley, whose general level is 7,500 feet above the sea, there are five lakes which in order from north to south are named Tzompanco, Xaltocan, Texcoco, Xochimilco, and Chalco. The last two contain fresh water, since they drain into Lake Texcoco, but the rest are more or less brackish. Lake Texcoco is by far the largest, although its area has been greatly reduced by natural and artificial causes since the coming of the Spaniards.

The largest river of Mexico is the Rio Lerma which takes the name Rio de Santiago during its deep and tortuous passage from Lake Chapala to the Pacific. Farther to the south is the Rio de las Balsas which likewise flows into the western ocean. The name means “River of the Rafts” and is given because of a peculiar floating apparatus made of gourds tied to a wooden framework that is used on this stream. Flowing into the Gulf of Mexico are several large streams, among which may be mentioned the Panuco, Papaloapan, Grijalva, and Usumacinta. The last is by far the greatest in volume of water, and with its maze of tributaries drains a large area of swamp and jungle in which are buried some of the most wonderful ruined cities of the New World.

In the northern part of Yucatan there are no rivers on the surface on account of the porous limestone. Instead there are great natural wells called cenotes where the roofs of subterranean rivers have fallen in. Many of the ancient cities were built near such natural wells.

Passing to the south the most important river of Guatemala is the Motagua, which has cut a fine valley through a region of lofty mountains. In Honduras there are several large rivers, including the Uloa, Patuca, and Segovia. The lake region of Nicaragua is drained by the San Juan River that flows into the Caribbean Sea. Nearly all the streams of Central America that flow into the Pacific are short and steep torrents. An important exception is the Lempa River that forms part of the interior boundary of Salvador.

Concerning lakes, mention has already been made of Chapala and Texcoco, the most important in Mexico. The former is about fifty miles in length. In the state of Michoacan there are a number of beautiful lakes intimately connected with the history and mythology of the Tarascan Indians. The most famous is called Patzcuaro. In southern Yucatan the shallow body of water known as Lake Peten also has a distinct historical interest. Several lakes in Guatemala are well known on account of the rare beauty of their situation. Lake Atitlan is surrounded by lofty mountains, and Lake Izabal, or Golfo Dulce, is famous for the luxuriance of the vegetation that screens its banks. Lakes Nicaragua and Managua are well known on account of their connection with the much-discussed canal projects. The Island of Ometepe in Lake Nicaragua bears an active volcano.

In regard to the geology it is only necessary to point out a few of the more important characters. The highlands which bear so many active and quiescent volcanoes naturally show great masses of eruptive rocks, some due to recent action and others much more ancient. Porous tufa is a common material for sculptures in many parts of Mexico and Central America. In other places there are great beds of softer and finer grained material also of volcanic origin. In these places, such as Copan in western Honduras and Mitla in southern Mexico, building in stone received its greatest development. The soft greenish stone of Copan seems to be a solidified mud flow permeated with volcanic ash rather than a true lava flow of melted rock. Limestones are also common and important in the economic development. In some regions there are beds of a hard, blue limestone going back to the Carboniferous epoch. This stone makes an excellent cement after burning. The Peninsula of Yucatan is a great plain of limestone of much more recent formation. Like our own Florida it was once a coral reef which was lifted above the sea by some natural agency. This limestone gets older and more solid as we approach the base of the peninsula but at best is rather porous and coarse-grained.

The fauna and flora present great variation. In the moist lowlands the monkeys play in the tree tops and the jaguar lies in wait for its prey. Alligators and crocodiles infest the rivers and swamps. Two small species of deer and the ocellated turkey are important items in the meat supply of Yucatan, that includes also the iguana, the peccary, and various large rodents. The tapir and manatee are the largest animals of the lowlands but neither seems to have been of great significance to the natives. Bats are frequently represented in the ancient art and a bat demon appears in several myths.

Upon the highlands of Mexico the Toltecan deer is still hunted, together with the wild turkey that is the parent of our domestic birds. The turkey was, in fact, domesticated by the Mexican tribes. It probably occurred southward over the Guatemalan highlands, but is now extinct in this latter region. In the southern part of Central America the place of the turkey as an item of diet is taken by the curassow, a yellow-crested bird with black plumage. The coppery-tailed trogon, the famous quetzal, was sacred in ancient times and is now the emblem of Guatemala. This beautiful bird occurs only in the cloud cap forest zone on the high mountains of southern Mexico and Guatemala. Blue macaws, parrots, paroquets, and humming birds contributed their gay plumage to adorn headdresses and feather-covered cloaks. These and many other birds doubtless flitted about in the aviary of Moctezuma. The black vulture, the king vulture, and the harpy eagle are other conspicuous birds often figured in the ancient art. The coyote, ocelot, and puma are the principal beasts of prey on the highlands.

Among the characteristic trees of the lowlands may be mentioned the palm, which occurs in great variety, the amate and ceiba, both of which attain to large size, as well as mahogany, Spanish cedar (which is not a cedar at all but a close relative of the mahogany), campeche, or logwood, rosewood, sapodilla, and other trees of commerce. Upon the higher mountain slopes are forests of long-leaf pine and of oak. In the desert stretches the cactus is often tree-like and there are many shrubs that in the brief spring become masses of highly-colored blossoms.

Some of the principal crops of Mexico and Central America have been introduced from the Old World, including coffee, sugar cane, and bananas. Other crops such as maize, beans, chili peppers, cocoa, etc., are indigenous. Among the native fruits may be mentioned the aguacate, or alligator pear, the mamey, the anona, or custard apple, the guanabina, jocote, and nance.