Independence day of the Republic of Colombia
Colombia, officially Republic of Colombia, Spanish República de Colombia, country of northwestern South America. Its 1,000 miles (1,600 km) of coast to the north are bathed by the waters of the Caribbean Sea, and its 800 miles (1,300 km) of coast to the west are washed by the Pacific Ocean. The country is bordered by Panama, which divides the two bodies of water, on the northwest, Venezuela and Brazil on the east, and Peru and Ecuador on the south. It is more than twice the size of France and includes the San Andrés y Providencia archipelago, located off the Nicaraguan coast in the Caribbean, some 400 miles (650 km) northwest of the Colombian mainland. The population is largely concentrated in the mountainous interior, where Bogotá, the national capital, is situated on a high plateau in the northern Andes Mountains.
The only American nation that is named for Christopher Columbus, the “discoverer” of the New World, Colombia presents a remarkable study in contrasts, in both its geography and its society. The lofty snow-tipped peaks of the country’s interior cordilleras tower high above equatorial forests and savannas where surviving Indian groups still follow the lifeways and traditions of their ancestors. In the cooler mountains, at intermediate elevations, modern cities are juxtaposed with traditional rural landscapes where mestizo farmers cultivate their small plots of coffee, corn (maize), and other crops. The more accessible Atlantic lowlands, dominated by large livestock haciendas and a tri-ethnic population, have a distinctively different character.Colombia strongly reflects its history as a colony of Spain. It is often referred to as the most Roman Catholic of the South American countries, and most of its people are proud of the relative purity of their Spanish language. Its population is heavily mestizo (of mixed European and Indian descent) with substantial minorities of European and African ancestry. The economy is traditionally based on agriculture, particularly coffee and fruit production, but industries and services are increasing in importance. Colombia is the most populous nation of Spanish-speaking South America. More than one-third of its inhabitants live in the six largest metropolitan areas, of which Bogotá is the largest. The nation’s political instability has been historically tied to the unequal distribution of wealth, and the illicit trade in drugs (mainly cocaine) remains a major disruptive factor in Colombian life.
Land - Relief
Few countries boast such striking physical variety as does Colombia. Its broken, rugged topography, together with its location near the Equator, creates an extraordinary diversity of climates, vegetation, soils, and crops. The Andean cordillera, one of the world’s great mountain ranges, dominates the landscape of the western part of the country, where most of the people live. North of the border with Ecuador the cordillera flares out into three distinct parallel ranges. Two great river valleys, those of the Magdalena and the Cauca, separate them and provide avenues of penetration from the Atlantic coastal lowlands into the heart of the country. Volcanic activity in the geologic past blocked the middle course of the Cauca River to form a great lake that once filled the western inter-Andean trough for some 120 miles (190 km) south of Cartago. The river eventually broke through the dam to leave the level floor of the Cauca valley at some 3,000 feet (900 metres) above sea level; today it is one of the nation’s most productive agricultural areas.
The Colombian cordilleras belong to the northern portion of the great Andean mountain system, which extends along the Pacific coast of South America. The Andes are among the world’s most youthful mountain ranges and among the highest. The geologic history of this northern sector is less well understood than that of the central and southern parts. It is clear, however, that the entire cordillera has been thrust up through the subduction of the crumpled eastern margin of the Nazca Plate and, to the north, the Caribbean Plate under the more rigid but lighter South American Plate, which has been forced westward by the spreading Atlantic seafloor. These tectonic forces, similar to those found elsewhere around the Pacific Rim, continue to operate, as is evidenced by the high frequency of often destructive earthquakes. At the Pasto Massif, near the Ecuadoran border, the mountains divide into the Cordillera Occidental (“Western Range”), which runs parallel to the Pacific coast, and the Cordillera Central (“Central Range”), which, with its numerous volcanoes, forms the backbone of the system in Colombia and runs generally southwest to northeast. At the Great Colombian Massif of the Cordillera Central, near the San Agustín Archeological Park, the Cordillera Oriental (“Eastern Range”) branches off in a more decidedly northeasterly direction.Of the three ranges, the nonvolcanic Cordillera Occidental, which forms the barrier between the Cauca valley and the rain-drenched Pacific coast, is the lowest and least populated. Two passes at elevations less than 5,000 feet (1,500 metres) between Cali and Buenaventura on the Pacific coast mark the lowest depressions in the range. Elsewhere the crest is much higher, reaching 12,992 feet (3,960 metres) at Mount Paramillo in the department of Antioquia. From there the Cordillera Occidental fingers north into the three distinct serranías of Abibe, San Jerónimo, and Ayapel, forested ranges that drop gradually toward the piedmont plains of the Caribbean littoral. A lesser topographic feature on the Pacific coast is the Baudó Mountains, separated from the Cordillera Occidental by the valley of the Atrato River, which empties into the Caribbean Gulf of Urabá; the Baudó Mountains represent a southward extension of the Isthmus of Panama.
The Cordillera Central is the highest of the Andean ranges of Colombia, rising to an average height of 10,000 feet (3,000 metres). It is a continuation of the Ecuadoran volcanic structure. Crystalline rocks are exposed at several places on its flanks and are the foci of localized gold and silver deposits. Sandstones and shales of the Paleogene and Neogene periods (about 65 to 2.6 million years ago) are also a part of the older basement that has been capped by ash and lava derived from some 20 volcanoes of the Quaternary Period (the past 2.6 million years). Several of the latter reach well into the zone of permanent snow, above 15,000 feet (4,600 metres). The highest are Mount Huila (18,865 feet [5,750 metres]), southeast of Cali, and the Ruiz-Tolima complex (some 17,700 feet [5,400 metres]) between Manizales and Ibagué. The fertile ash from their eruptions has produced the high, cool plateaus of Nariño department and the often steep slopes to the north that support much of Colombia’s coffee production. In November 1985 Mount Ruíz erupted, melting the snow and ice that covered it and sending great mudflows downslope, destroying the city of Armero and killing more than 25,000 in one of the country’s greatest catastrophes.
North of Mount Ruíz, near Sonsón in the department of Antioquia, the volcanic Cordillera Central gives way to the deeply weathered, granitic Antioquia batholith (an exposed granitic intrusion), a tableland averaging some 8,000 feet (2,500 metres) above sea level. It is divided into two parts by the deep transverse cleft of the Porce River, which occupies the U-shaped valley in which is situated the expanding metropolis of Medellín, Colombia’s second city. The batholith contains gold-bearing quartz veins, which were the source of the placer gravels that gave rise to an active colonial mining economy. Beyond Antioquia the lower, remote San Lucas Mountains extend northward toward the confluence of the Magdalena and Cauca rivers.
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Score: https://www.britannica.com/place/Colombia
