. The earth and its inhabitants ... Geography. MOUNTAINS OF MEXICO. 21 extent, but exceed 6,600 feet in altitude ; even tlie Toluca basin, in the angle formed by the two diverging main ranges, stands at a mean height of 8,500 feet above the sea. Going northwards from Anahuac the continually diverging sierras give more space for elevated plains, and in the northern regions the vast expanses enclosed bj^ the encircling ranges present almost perfectly level surfaces, broken only by low ridges. As they stretch northwards these expanses fall in the direc- tion of the east, and the east sierra itsel
. The earth and its inhabitants ... Geography. MOUNTAINS OF MEXICO. 21 extent, but exceed 6,600 feet in altitude ; even tlie Toluca basin, in the angle formed by the two diverging main ranges, stands at a mean height of 8,500 feet above the sea. Going northwards from Anahuac the continually diverging sierras give more space for elevated plains, and in the northern regions the vast expanses enclosed bj^ the encircling ranges present almost perfectly level surfaces, broken only by low ridges. As they stretch northwards these expanses fall in the direc- tion of the east, and the east sierra itself is much narrower, its mean elevation being 6,500 feet, or about 1,600 feet less than that of the western escarpment. A third range, parallel with, but completely separated from, the two sierras Fig. 10.—Relief of Mexico. Scale 1 ; 30,000, ? 0 to Feet. 3,300 to 6,600 Feet. ITeights. 6,600 to 9,900 Feet. Depths. 9,9uO to 16,500 Feet. 16,500 Feet and upwards. 0 to 500 Fathoms. 500 to Fathoms. Fathoms and upwards. , 620 Miles. enclosing the Mexican tablelands, traverses the Californian peninsula at different elevations and with two interruptions. Isolated eminences, " lost mountains," as they are called, are dotted over the space comprised between the highlands of the American California and the range traversing the peninsula which belongs to Mexico, but which continues the axis of the Sierra Madre. The mountains of this peninsula, varying as they do in height and form, must therefore be regarded as forming an orographic system quite distinct from that of. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Reclus, Elisée, 1830-1905; Ravenstein, Ernest George, 1834-1913; Keane, A. H. (Augustus Henry), 1833-1912. New York, D. Appleton and company
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