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| Central Plateau (Brazil) | |
|---|---|
| Name | Central Plateau (Brazil) |
| Native name | Planalto Central |
| Settlement type | Plateau |
| Subdivision type | Country |
| Subdivision name | Brazil |
| Elevation m | 300–1600 |
Central Plateau (Brazil) The Central Plateau in Brazil is a vast upland region occupying much of the central and eastern portions of the Brazilian Highlands and forming the watershed between the Amazon Basin, the São Francisco River system, and the Paraná River basin. The plateau underpins the political geography of Goiás, Mato Grosso, Mato Grosso do Sul, Minas Gerais, Bahia, Distrito Federal, and Tocantins, and hosts major urban centers including Brasília, Goiânia, and Cuiabá. Its landscape, geology, and climate have shaped historical processes from the era of Portuguese colonization of Brazil through the development of Brasília and the expansion of agribusiness.
The Central Plateau spans portions of the Brazilian Highlands, bordered to the north by the Amazon Basin and to the south by the Paraná Basin, containing river systems such as the Tocantins River, the Araguaia River, the São Francisco River, and tributaries of the Tapajós River. Elevation ranges from roughly 300 m to over 1,600 m with notable geomorphologic features like the Chapada dos Veadeiros, the Chapada dos Guimarães, and the Serra da Canastra, while the Planalto Central includes outcrops of Cerrado plateaus and inselbergs associated with the Guiana Shield margin and the São Francisco Craton. Major transportation corridors cross the plateau connecting Belém–Brasília Highway, BR-050, and other federal highways that link to ports such as Port of Santos and river ports on the Amazon River.
The plateau rests largely on ancient Precambrian crystalline basement of the São Francisco Craton and Proterozoic to Paleozoic cover sequences altered during episodes related to the assembly of Gondwana and the breakup that formed the South Atlantic Ocean. Tectonic stability has produced extensive lateritic weathering profiles, ferruginous duricrusts, and quartzite mesas; minerals include iron ore deposits related to the Quadrilátero Ferrífero in Minas Gerais and banded iron formations akin to those exploited by companies such as Vale S.A.. Volcanic and sedimentary cover associated with the Paraná Basin and relict drainage systems shaped by Pleistocene climatic cycles played roles in sculpting the present topography and aquifers like the Guarani Aquifer interface at the plateau margins.
Climate on the Central Plateau is strongly seasonal with a pronounced wet season and dry season driven by the southward and northward migration of the Intertropical Convergence Zone and modulated by sea surface temperature anomalies associated with El Niño–Southern Oscillation and the Atlantic Multidecadal Oscillation. Much of the region falls within the tropical savanna climate classification (Aw) with annual rainfall varying from about 800 mm to over 1,600 mm depending on elevation and proximity to the Atlantic Ocean; higher elevations can feature subtropical highland conditions similar to those around Belo Horizonte and Brasília.
The plateau is the core of the Cerrado biome, one of the world's biodiversity hotspots, characterized by savanna-like vegetation, gallery forests along rivers, and endemic flora such as species of Caryocar, Magonia, and Qualea. Fauna includes emblematic species like the maned wolf, the giant anteater, the three-banded armadillo, and diverse bird assemblages including hyacinth macaw relatives in adjacent habitats. Ecological mosaics include patches of cerradão, campo sujo, and seasonal wetlands that intergrade with remnants of Atlantic Forest and Amazon rainforest in transition zones, supporting ecological research institutions such as the Embrapa network and conservation programs under the Brazilian Ministry of the Environment.
Human settlement of the plateau intensified during the 19th century with gold rushes in Minas Gerais and later with inland settlement promoted by the government, culminating in the 1950s construction of Brasília and initiatives like the March to the West. Land use is dominated by extensive soybean cultivation, cattle ranching, and mechanized agriculture associated with agribusiness firms and export logistics tied to ports and railways, while indigenous territories and quilombola communities maintain cultural landscapes recognized by agencies such as the Fundação Nacional do Índio. Urbanization around Goiânia, Brasília, and regional centers has driven infrastructure projects including dams, highways, and irrigation schemes linked to companies like Itaipu Binacional (as a model) and federal rural development policies.
The plateau supplies significant agricultural commodities—soy, corn, sugarcane, and beef—that feed international markets and multinationals, while mineral extraction yields iron ore, manganese, and gold in areas like the Quadrilátero Ferrífero and mining corridors operated by firms such as Vale S.A. and smaller producers. Hydroelectric potential on plateau rivers has supported reservoirs and plants connected to the National Interconnected System powering industrial growth; petroleum exploration in nearby basins and bioprospecting of Cerrado biodiversity provide additional economic vectors pursued by institutions like Petrobras and research centers at federal universities including the University of Brasília.
The Central Plateau faces high rates of native vegetation conversion, fragmentation, and biodiversity loss driven by deforestation, pasture expansion, and infrastructure development, raising conflicts over land tenure involving agribusiness, indigenous groups, and environmental NGOs like WWF Brazil and Greenpeace Brazil. Soil erosion, savanna burning practices, and water cycle alterations threaten headwaters of rivers such as the São Francisco River and Araguaia River, prompting policy instruments like the Forest Code (Brazil) and protected areas including Chapada dos Veadeiros National Park and Emas National Park. Conservation strategies combine protected-area management, payments for ecosystem services piloted by state governments, and scientific monitoring by institutions such as Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis and university research teams.
Category:Geography of Brazil Category:Plateaus of South America