Geography of Colombia
The Republic of Colombia is situated largely in the north-west of South America, with some territories falling within the boundaries of Central America. It is bordered to the north-west by Panama; to the east by Brazil and Venezuela; to the south by Ecuador and Peru; and it shares maritime limits with Costa Rica, Nicaragua, Honduras, Jamaica, the Dominican Republic, and Haiti.
Colombia has a land size of and it is the 25th largest nation in the world and the fourth-largest country in South America. Colombia's population is not evenly distributed, and most of the people live in the mountainous western portion of the country as well as along the northern coastline; the highest number live in or near the capital city of Bogotá. The southern and eastern portions of the country are sparsely inhabited, consisting of tropical rainforest, and inland tropical plains that contain large estates or large livestock farms, oil and gas production facilities, small farming communities, and indigenous tribes with their territories. Colombia has the 35th largest Exclusive Economic Zone of.
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Colombia usually classifies its geography into five natural regions, from the Andes mountain range, a region shared with Ecuador, Venezuela; the Pacific Ocean coastal region, shared with Panama and Ecuador; the Caribbean Sea coastal region, shared with Venezuela and Panama; the Llanos, shared with Venezuela; to the Amazon rainforest region shared with Venezuela, Brazil, Peru and Ecuador. Colombia is one of only two South American countries that have coastline on both the Atlantic and Pacific oceans, the other being Chile.The World Factbook does not differentiate between the Amazon region of Colombia and the Orinoquia region of Colombia. It suggests dividing the country into four geographic regions: the Andean highlands, consisting of the three Andean ranges and intervening valley lowlands; the Caribbean lowlands coastal region; the Pacific lowlands coastal region, separated from the Caribbean lowlands by swamps at the base of the Isthmus of Panama; and eastern Colombia, the great plain that lies to the east of the Andes Mountains.
The chief western mountain range, the Cordillera Occidental, is a moderately high range with peaks reaching up to about . The Cauca River Valley, an important agricultural region with several large cities on its borders, separates the Cordillera Occidental from the massive Cordillera Central. Several snow-clad volcanoes in the Cordillera Central have summits that rise above. The valley of the slow-flowing and muddy Magdalena River, a major transportation artery, separates the Cordillera Central from the main eastern range, the Cordillera Oriental. The peaks of the Cordillera Oriental are moderately high. This range differs from Colombia's other mountain ranges in that it contains several large basins. In the east, the sparsely populated, flat to gently rolling eastern lowlands called llanos cover almost 60 percent of the country's total land area.
This cross section of the republic does not include two of Colombia's regions: the Caribbean coastal lowlands and the Sierra Nevada de Santa Marta, both in the northern part of the country. The lowlands in the west are mostly swampy; the reed-filled marshes of the area are called ciénagas by the people of Colombia. The Guajira Peninsula in the east is semiarid and is occupied primarily by indigenous peoples. The Sierra Nevada de Santa Marta is a spectacular triangular snowcapped block of rock that towers over the eastern part of this lowland. Here can be found the highest peak of the country, named Pico Cristobal Colon.
Andean region
Near the Ecuadorian frontier, the Andes Mountains divide into three distinct, roughly parallel chains, called cordilleras, that extend northeastward almost to the Caribbean Sea. Altitudes reach more than, and mountain peaks are permanently covered with snow. The elevated basins and plateaus of these ranges have a moderate climate that provides pleasant living conditions and in many places enables farmers to harvest twice a year. Torrential rivers on the slopes of the mountains produce a large hydroelectric power potential and add their volume to the navigable rivers in the valleys. In the late 1980s, approximately 78 percent of the country's population lived in the Andean highlands.The Cordillera Occidental in the west, the Cordillera Central in the center, and the Cordillera Oriental in the east have different characteristics. Geologically, the Cordillera Occidental and the Cordillera Central form the western and eastern sides of a massive crystalline arch that extends from the Caribbean lowlands to the southern border of Ecuador. The Cordillera Oriental, however, is composed of folded stratified rocks overlying a crystalline core.
The Cordillera Occidental is relatively low and is the least populated of the three cordilleras. Summits are only about above sea level and do not have permanent snows. Few passes exist, although one that is about above sea level provides the major city of Cali with an outlet to the Pacific Ocean. The relatively low elevation of the cordillera permits dense vegetation, which on the western slopes is truly tropical.
The Cordillera Occidental is separated from the Cordillera Central by the deep rift of the Cauca Valley. The Río Cauca rises within of the border with Ecuador and flows through some of the best farmland in the country. After the two cordilleras converge, the Cauca Valley becomes a deep gorge reaching to the Caribbean lowlands.
The Cordillera Central is the loftiest of the mountain systems. Its crystalline rocks form a towering wall dotted with snow-covered volcanoes that is long. There are no plateaus in this range and no passes under. The highest peak in this range, the Nevado del Huila, reaches above sea level. The second highest peak is a volcano, Nevado del Ruiz, which erupted violently on November 13, 1985. Toward its northern end, this cordillera separates into several branches that descend toward the Caribbean coast.
Between the Cordillera Central and the Cordillera Oriental flows the Magdalena River. This river rises near a point some north of the border with Ecuador, where the Cordillera Oriental and the Cordillera Central diverge. Its spacious drainage area is fed by numerous mountain torrents originating high in the snowfields. The Magdalena River is generally navigable from the Caribbean Sea as far as the town of Neiva, deep in the interior, but it is interrupted midway by rapids. The valley floor is very deep; nearly from the river's mouth the elevation is no more than about.
In the Cordillera Oriental, at elevations between, three large fertile basins and a number of small ones provide suitable areas for settlement and intensive economic production. In the basin of Cundinamarca, where the Spanish encountered the regional Chibcha Indians, the European invaders established the town of Santa Fe de Bogotá at an elevation of above sea level.
To the north of Bogotá, in the densely populated basins of Chiquinquirá and Boyacá, are fertile fields, rich mines, and large industrial establishments that produce much of the national wealth. Still farther north, where the Cordillera Oriental makes an abrupt turn to the northwest near the border with Venezuela, the Sierra Nevada de Cocuy, the highest point of this range, rises to above sea level. In the department of Santander, the valleys on the western slopes are more spacious, and agriculture is intensive in the area around Bucaramanga. The northernmost region of the range around Cúcuta is so rugged that historically it has been easier for residents here to maintain communications and transportation with Venezuela than with the adjacent parts of Colombia.
The basic plantation of Colombia is grassy and is near the equator which allows many tropical-like plants.
Caribbean region
The Caribbean lowlands consist of all of Colombia north of an imaginary line extending northeastward from the Golfo de Urabá to the Venezuelan frontier at the northern extremity of the Cordillera Oriental. The semiarid Guajira Peninsula and Guajira–Barranquilla xeric scrub, in the extreme north, bear little resemblance to the rest of the region. In the southern part rises the Sierra Nevada de Santa Marta, an isolated mountain system with peaks reaching heights over and slopes generally too steep for cultivation.The Caribbean lowlands region is in roughly the shape of a triangle, the longest side of which is the coastline. Most of the country's commerce moves through the cities of Cartagena, Barranquilla, Santa Marta, and the other ports located along this important coast. Inland from these cities are swamps, hidden streams, and shallow lakes that support banana and cotton plantations for major commodity crops, countless small farms, and, in higher places, cattle ranches.
The city of Cartagena is a petrochemical, seaport, and tourist city. Santa Marta is also a seaport and tourist city but it is smaller scale city in comparison. Barranquilla is located some from the Caribbean coastline but it is a more developed city, with a greater number of industries and commercial places, widely known for its skilled workers in producing all forms of metalwork and accomplishing construction. Its inhabitants have the highest education level of the region. The city is famous as the starting point and focus of the region and the country's development: it was the first city in the nation to install and use telephones, public lighting, air mail, planes, and industrial works.
The Caribbean region merges next to and is connected with the Andean highlands through the two great river valleys. After the Andean highlands, it is the second-most important region in terms of economic activity. Approximately 17% of the country's population lived in this region in the late 1980s.
The region also includes the peninsular archipelago of San Andres Island and the Insular Territories of Colombia, which are disputed in part by Nicaragua. However, the Colombian Navy protects such territories with the use of force when necessary to avoid foreign invasion. The islands are fortified with two important bases for defense and custom controls. These were formerly used for research of classified projects with civilian assistance; the local universities often conduct research in the areas of oceanography and marine biology but also in the fields of biochemistry, genetics and immunology. Colombia is known for its advances in medical fields in experimental surgery, breast implant development, or prosthetics, and immunology. These facilities serve as containment and secure experimentation labs to complement those in Barranquilla and other undisclosed locations within the coast territories.
The Insular Region is considered by some as a geopolitical region of Colombia. It comprises the areas outside the continental territories of Colombia and includes the San Andrés y Providencia Department in the Caribbean Sea and the Malpelo and Gorgona islands in the Pacific Ocean. Its subregions include other groups of islands: