The Sierra Mixteca is a mountainous region located between the

states State may refer to: Arts, entertainment, and media Literature * '' State Magazine'', a monthly magazine published by the U.S. Department of State * ''The State'' (newspaper), a daily newspaper in Columbia, South Carolina, United States * ''Our ...

Puebla Puebla ( en, colony, settlement), officially Free and Sovereign State of Puebla ( es, Estado Libre y Soberano de Puebla), is one of the 32 states which comprise the Federal Entities of Mexico. It is divided into 217 municipalities and its cap ...

and

Oaxaca ) , population_note = , population_rank = 10th , timezone1 = CST , utc_offset1 = −6 , timezone1_DST = CDT , utc_offset1_DST = −5 , postal_code_type = Postal ...

in south-central

Mexico Mexico ( Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guate ...

, in the region known as

La Mixteca La Mixteca is a cultural, economic and political region in Western Oaxaca and neighboring portions of Puebla, Guerrero in south-central Mexico, which refers to the home of the Mixtec people. In their languages, the region is called either Ñuu Djau ...

. It is also known as the Nudo Mixteco or Escudo Mixteco (

Mixtec The Mixtecs (), or Mixtecos, are indigenous Mesoamerican peoples of Mexico inhabiting the region known as La Mixteca of Oaxaca and Puebla as well as La Montaña Region and Costa Chica Regions of the state of Guerrero. The Mixtec Cultur ...

Shield A shield is a piece of personal armour held in the hand, which may or may not be strapped to the wrist or forearm. Shields are used to intercept specific attacks, whether from close-ranged weaponry or projectiles such as arrows, by means of ...

) and, in

Nahuatl Nahuatl (; ), Aztec, or Mexicano is a language or, by some definitions, a group of languages of the Uto-Aztecan language family. Varieties of Nahuatl are spoken by about Nahua peoples, most of whom live mainly in Central Mexico and have small ...

, as Zempoaltépetl (meaning "twenty mountains"), which is also the name of the

Cerro Zempoaltépetl Cerro is Spanish for "hill" or "mountain". Toponyms ;Bolivia: * Cerro Rico, the "Rich Mountain" containing silver ore near Potosi, Bolivia ;Brazil: *Cerro Branco, a municipality of Rio Grande do Sul *Cerro Grande, Rio Grande do Sul, a municipa ...

, its highest peak (3400 m). In the

Mixtec language The Mixtec () languages belong to the Mixtecan group of the Oto-Manguean language family. Mixtec is spoken in Mexico and is closely related to Trique and Cuicatec. The varieties of Mixtec are spoken by over half a million people.2000 census; ...

it is called Ñuñume, the land of clouds. The Sierra Mixteca is one of the oldest geological regions in the territory of Mexico. It stands at the convergence of the

Sierra Madre Oriental The Sierra Madre Oriental () is a mountain range in northeastern Mexico. The Sierra Madre Oriental is part of the American Cordillera, a chain of mountain ranges (cordillera) that consists of an almost continuous sequence of mountain ranges that ...

, the Neo-Volcanic Axis, and the

Sierra Madre del Sur The Sierra Madre del Sur is a mountain range in southern Mexico, extending from southern Michoacán east through Guerrero, to the Isthmus of Tehuantepec in eastern Oaxaca. Geography The Sierra Madre del Sur joins with the Eje Volcánico Trans ...

. During the emergence of the two Sierra Madre ranges, the Mixtec Shield underwent intense

erosion Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is di ...

and

faulting In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectoni ...

, which caused changes in the upper courses of the Rivers Balsas, Lerma and

Papaloapan The Papaloapan River () is one of the main rivers of the Mexican state of Veracruz. Its name comes from the Nahuatl ''papaloapan'' meaning "river of the butterflies". In 1517, Juan de Grijalva's expedition spotted the river, naming it Río de Alv ...

. During that geological process, which also involved high levels of

volcanic activity Volcanism, vulcanism or volcanicity is the phenomenon of eruption of molten rock (magma) onto the surface of the Earth or a solid-surface planet or moon, where lava, pyroclastics, and volcanic gases erupt through a break in the surface called a ...

, the rivers rising in the Sierra Mixteca carved out many deep canyons, further complicating the relief of the region. One of the most important valleys created during this period is the Tehuacán Valley, located in south-east Puebla, an area of mineral springs. The Sierra Mixteca is one of the country's poorest regions in natural resources. Its inhabitants, who number some 200,00

are predominantly Indigenous peoples of the Americas, indigenous, mostly belonging to the

Mixtec people The Mixtecs (), or Mixtecos, are indigenous Mesoamerican peoples of Mexico inhabiting the region known as La Mixteca of Oaxaca and Puebla as well as La Montaña Region and Costa Chica Regions of the state of Guerrero. The Mixtec Culture wa ...

, who engage in

subsistence agriculture Subsistence agriculture occurs when farmers grow food crops to meet the needs of themselves and their families on smallholdings. Subsistence agriculturalists target farm output for survival and for mostly local requirements, with little or no s ...

. The region lacks any major population centres and communications with the rest of the country are deficient.

External links

Sierra Mixteca
{{coord missing, Puebla, Oaxaca

Mixteca The Mixtecs (), or Mixtecos, are indigenous Mesoamerican peoples of Mexico inhabiting the region known as La Mixteca of Oaxaca and Puebla as well as La Montaña Region and Costa Chica Regions of the state of Guerrero. The Mixtec Culture wa ...

Landforms of Puebla Landforms of Oaxaca Geography of Mesoamerica Mixtec