The Serra do Mar (, Portuguese for ''Sea's Ridge'' or ''Sea Ridge'') is a 1,500 km long system of

mountain range A mountain range or hill range is a series of mountains or hills arranged in a line and connected by high ground. A mountain system or mountain belt is a group of mountain ranges with similarity in form, structure, and alignment that have ari ...

s and

escarpment An escarpment is a steep slope or long cliff that forms as a result of faulting or erosion and separates two relatively level areas having different elevations. The terms ''scarp'' and ''scarp face'' are often used interchangeably with ''esca ...

s in Southeastern Brazil.

Geography

The Serra do Mar runs parallel to the

Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...

coast from the state of Espírito Santo to southern Santa Catarina,Angulo, R. J., G. C. Lessa, M. C. de Souza (2009). ''The Holocene Barrier Systems of Paranaguá and Northern Santa Catarina Coasts, Southern Brazil.'' Lecture Notes in Earth Sciences 107: 135-176. although some literature includes the

Serra Geral The Serra Geral (General Mountains) is a mountain range in southern Brazil, constituting the southern portion of the Serra do Mar system which runs along Brazil's southeastern coast. The Serra Geral runs parallel to the Atlantic coast in Sant ...

in the Serra do Mar, in which case the range would extend to northeastern

Rio Grande do Sul Rio Grande do Sul (, , ; "Great River of the South") is a state in the southern region of Brazil. It is the fifth-most-populous state and the ninth largest by area. Located in the southernmost part of the country, Rio Grande do Sul is border ...

. The main escarpment forms the boundary between the sea-level littoral and the inland

plateau In geology and physical geography, a plateau (; ; ), also called a high plain or a tableland, is an area of a highland consisting of flat terrain that is raised sharply above the surrounding area on at least one side. Often one or more sides ...

(''planalto''), which has a mean altitude of . This escarpment is part of the

Great Escarpment The Great Escarpment is a major topographical feature in Africa that consists of steep slopes from the high central Southern African plateauAtlas of Southern Africa. (1984). p. 13. Reader's Digest Association, Cape Town downward in the directio ...

that runs along much of the eastern coast of Brazil south from the city of

Salvador, Bahia Salvador (English: ''Savior'') is a Brazilian municipality and capital city of the state of Bahia. Situated in the Zona da Mata in the Northeast Region of Brazil, Salvador is recognized throughout the country and internationally for its cuisi ...

Mountain ranges

The mountain ranges are discontinuous in several places and are given individual names such as Serra de Bocaina, Serra de Paranapiacaba,

Serra Negra Serra Negra is a municipality in the state of São Paulo, Brazil. It belongs to the meso-region of Campinas. Population (2020) was 29,452 inhabitants. Total area: 203,5 km2, demographic density: 112 inhabitants/km2 Location The name of th ...

, Serra dos Órgãos, Serra do Indaiá, etc. The range also extends to some large islands near the coastline, such as Ilhabela and Ilha Anchieta. With an altitude of , Pico da Caledônia in Nova Friburgo is among the highest points in Serra do Mar. Geologically, the range belongs to the massive

crystalline rock A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macros ...

platform that forms Eastern

South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the sou ...

, and tectonically it is very stable. Most of the elevations of Serra do Mar were formed about 60 million years ago.

Natural history

At the time of the European discovery of Brazil (1500), the Serra do Mar supported a rich and highly diversified ecosystem, composed mainly of lush tropical rain forest, called ''

Atlantic Forest The Atlantic Forest ( pt, Mata Atlântica) is a South American forest that extends along the Atlantic coast of Brazil from Rio Grande do Norte state in the northeast to Rio Grande do Sul state in the south and inland as far as Paraguay and th ...

'' (''Mata Atlântica''). Due to

urbanization Urbanization (or urbanisation) refers to the population shift from rural to urban areas, the corresponding decrease in the proportion of people living in rural areas, and the ways in which societies adapt to this change. It is predominantly th ...

and

deforestation Deforestation or forest clearance is the removal of a forest or stand of trees from land that is then converted to non-forest use. Deforestation can involve conversion of forest land to farms, ranches, or urban use. The most concentrated ...

, however, most of the forest cover has been destroyed and what cover remains is almost exclusively on the steep escarpments facing the sea. A chain of national and

state park State parks are parks or other protected areas managed at the sub-national level within those nations which use "state" as a political subdivision. State parks are typically established by a state to preserve a location on account of its natural ...

s, ecological stations and biological reserves now protect the Mata Atlântica and its biological heritage, but

acid rain Acid rain is rain or any other form of precipitation that is unusually acidic, meaning that it has elevated levels of hydrogen ions (low pH). Most water, including drinking water, has a neutral pH that exists between 6.5 and 8.5, but ac ...

pollution Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, th ...

, poachers, clandestine loggers,

forest fire A wildfire, forest fire, bushfire, wildland fire or rural fire is an unplanned, uncontrolled and unpredictable fire in an area of combustible vegetation. Depending on the type of vegetation present, a wildfire may be more specifically identi ...

s and encroachment by urban areas and farms are still causing active destruction, particularly in the areas around cities. Several large metropolises, such as Vale do Itajaí,

Curitiba Curitiba () is the capital and largest city in the state of Paraná in Brazil. The city's population was 1,948,626 , making it the eighth most populous city in Brazil and the largest in Brazil's South Region. The Curitiba Metropolitan area ...

São Paulo São Paulo (, ; Portuguese for ' Saint Paul') is the most populous city in Brazil, and is the capital of the state of São Paulo, the most populous and wealthiest Brazilian state, located in the country's Southeast Region. Listed by the GaW ...

and

Rio de Janeiro Rio de Janeiro ( , , ; literally 'River of January'), or simply Rio, is the capital of the state of the same name, Brazil's third-most populous state, and the second-most populous city in Brazil, after São Paulo. Listed by the GaWC as a b ...

, are near the ''Serra do Mar''.

Reforestation Reforestation (occasionally, reafforestation) is the natural or intentional restocking of existing forests and woodlands ( forestation) that have been depleted, usually through deforestation, but also after clearcutting. Management A de ...

and recuperation of biological diversity are notoriously difficult to bring about in destroyed rain forest habitats.

References

{{DEFAULTSORT:Serra Do Mar Mar, Serra do Atlantic Forest Escarpments Landforms of Espírito Santo Landforms of Rio de Janeiro (state) Landforms of São Paulo (state) Landforms of Santa Catarina (state) World Heritage Sites in Brazil

Geography

Mountain ranges

Natural history

See also

References