The Pacific Coastal Lowlands begin near Mexicali and the Colorado River delta

The pacific coastal lowlands begin near mexicali and

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The Pacific Coastal Lowlands begin near Mexicali and the Colorado River delta in the north and terminate near Tepic , some 900 miles (1,450 km) to the south. For most of that distance, they face the Gulf of California while traversing the states of Sonora , Sinaloa , and Nayarit . Bounded on the east by the steep-sided Sierra Madre Occidental, the lowlands are a series of coastal terraces, mesas, and small basins interspersed with riverine deltas and restricted coastal strips. Although the vast Sonoran Desert dominates their northern section, parts of the lowlands have been irrigated and transformed into highly productive farmland. The largest and most densely populated region is the inland Mexican Plateau , which is flanked by the Sierra Madre Occidental and Sierra Madre Oriental. The plateau consists of the vast Mesa del Norte (Northern Plateau) and the smaller but heavily populated Mesa Central (Mesa de Anáhuac). The Mesa del Norte begins near the U.S. border; covers great stretches of the states of Chihuahua , Coahuila , Durango , Zacatecas , Jalisco , and Aguascalientes ; and ends near San Luis Potosí city. From there the Mesa Central stretches to a
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10/3/19, 8)02 AM Mexico | History, Geography, Facts, & Points of Interest | Britannica.com Page 8 of 14 point just south of Mexico City. The plateau tilts gently upward from the north toward the south; at its northern end, the Mesa del Norte is about 4,000 feet (1,200 metres) above sea level. Throughout the region, relatively flat intermontane basins and bolsones (ephemeral interior drainage basins) are interrupted by mountainous outcrops. In the north the Chihuahuan Desert covers a section of the plateau that is more extensive than the U.S. state of California. The Sierra Madre. Encyclopædia Britannica, Inc. The Mesa Central covers large parts of Michoacán , Guanajuato , Querétaro , Hidalgo , and México states and the Federal District (Mexico City). Its southern end rises 7,000–9,000 feet (2,100–2,700 metres) in the vicinity of Mexico City. The Mesa Central, moister and generally flatter than the Mesa del Norte, is divided into a series of fairly level intermontane basins separated by eroded volcanic peaks. The largest valleys rarely exceed 100 square miles (260 square km) in area, and many others are quite small. Among the generally fertile basins is the Bajío (El Bajío, or the Basin of Guanajuato), the traditional breadbasket of the country, which is located in the northern part of )
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10/3/19, 8)02 AM Mexico | History, Geography, Facts, & Points of Interest | Britannica.com Page 9 of 14 the Mesa Central. Many of the basins were once sites of major lakes that were drained to facilitate European and mestizo settlement. Around Mexico City the weak, structurally unstable soils that remain have caused the colonial-era Metropolitan Cathedral and other buildings to shift on their foundations and, over many years, to list or sink unevenly into the ground.
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