A Geomorfologia do Brasil
Autor: Blog do Pré-universitário | Publicado: 2011-05-20T12:47:00-07:00

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 <![endif]-->  As altitudes do relevo brasileiro são baixas devido a várias causas; umas de origem interna, outras de origem externa.Causas de origem interna:      ausência de dobramentos, desde o período devoniano da Era Paleozóica, e      também na ausência de vulcanismos durante o Quartenário;
Causas de origem      externa:&nbsp; merecem destaque especial as águas corrente, as águas do      mar e o clima.
&nbsp;A maior parte do território brasileiro (5/8) é constituída por planaltos, o restante(3/8) corresponde a terras baixas.

Aroldo de Azevedo: divisão do relevo brasileiro em planaltos e planícies.Planaltos- Em linhas gerais,      há no Brasil dois grandes planaltos; o primeiro chamado Planalto das      Guianas e o segundo de Planalto brasileiro;
Planícies- sedimentares, as      planícies nacionais são, na sua quase totalidade, formadas por terrenos cenozóicos.
Aziz Ab'Saber discípulo de Aroldo de AzevedoPlanalto- Área mais ou menos      plana em que a erosão é maior que a sedimentação;
Planície- Área mais ou menos      plana onde a sedimentação é maior que a erosão.
Jurandy Ross- "atual critério aceito"Planalto- altitudes      superiores a 300 metros;
Planícies- altitudes      inferiores a 100 metros;
Depressão- suaves      inclinações a altitudes entre 100 e 500 metros.
&nbsp;&nbsp;&nbsp; Formas De RelevoSerra- terremotos      acidentados com forte desnível;
Chapada- superfícies      horizontais e superiores a 600 metros;
Inselbergues ou Monólitos-      elevações ilhadas com predominância no semi-árido;
Planalto- extensão de      terrenos sedimentares mais ou menos planos situados em altitudes      variáveis. Diz-se que a superfície do planalto é muito regular;
Chapadão- termo regional      utilizado para uma série de chapadas ou planaltos de superfície regular;
Falésias- formas de relevo      litorâneo;
Cuesta - forma de relevo dissimétrica      que se inclinam numa direção, formando um declive suave no reverso e um      corte abrupto ou íngreme na chapada;
Depressão- denominação usada      por Bornhardt &nbsp;para as elevações      ilhadas que aparecem em regiões de clima árido.