Abstract

The present article has as objective to analyse the interrelations between the relief, the lithology, the hydrography and the conspicuous evidence of tectonics on the area covered by the Araçaji 1: 25.000 chart, State of Paraíba, Northeast Brazil. The results showed the existence of anomalies in the study area, such as altimetry with disproportionate dimensions to the regional average, strong channel inflections, rectilinear channels and modified patterns in the drainage network influenced mainly by the local geological framework and possibly the Cenozoic tectonics. Allied to this qualitative analysis, morphometric indices were applied, for which the values obtained corroborate the tectonic influence in the area. The methodology used in this article requires a greater comparison to results obtained in other areas of the Atlantic continental border. Geomorfologia, morfometria e evidências de tectônica na Folha Araçaji, Borda Oriental da ParaíbaR E S U M OO presente artigo tem como objetivo analisar as interrelações existentes entre o relevo, a litologia, a hidrografia e a conspícua evidência tectônica da área da folha Araçaji na escala de 1:25.000, Estado da Paraíba, Nordeste do Brasil. Os resultados mostraram a existência de anomalias na área em questão, como altimetria com cotas desproporcionais à média da região, fortes inflexões na direção de canais, canais retilíneos e padrões modificados na rede de drenagem influenciados, principalmente, pelo arcabouço geológico local e, possivelmente, pela tectônica cenozoica. Aliados a essa análise qualitativa, foram aplicados índices morfométricos, nos quais os valores obtidos corroboram com a influência tectônica na área. A metodologia empregada neste artigo carece de maior comparação com resultados obtidos em outras áreas da borda continental atlântica.Palavras-chave: Geomorfologia Estrutural; Bacia Hidrográfica; Rio Mamanguape; Rede de drenagem.

Highlights

  • This article addresses the mutual relations of lithology, hydrography and tectonics in the configuration of relief in the Araçaji topographic chart, eastern border of the State of Paraíba

  • With the continuous separation of the South American Plate from the African Plate, there is a continuous adjustment of the lithology of the entire area, which is substantially reflected in the arrangement and morphology of the drainage network, showing patterns incompatible with a classic hydrographic evolution proclaimed in tectonically stable zones

  • The methodological structuring of this article is based on two investigative lines: a qualitative bias, which investigates the forms of relief and its interrelationships with hydrography and geology and a quantitative analysis, which studies the relationship between geomorphology/tectonics/hydrography through application of morphometric indices very widespread today

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Summary

Revista Brasileira de Geografia Física

Geomorphology, morphometry and evidence of tectonics in the Araçaji Chart, Eastern Edge of Paraíba. The results showed the existence of anomalies in the study area, such as altimetry with disproportionate dimensions to the regional average, strong channel inflections, rectilinear channels and modified patterns in the drainage network influenced mainly by the local geological framework and possibly the Cenozoic tectonics. Allied to this qualitative analysis, morphometric indices were applied, for which the values obtained corroborate the tectonic influence in the area. Geomorfologia, morfometria e evidências de tectônica na Folha Araçaji, Borda Oriental da Paraíba

RE S UMO
Introduction
Materials and methods
Qualitative analysis
Quantitative analyses
Asymmetric Factor Index
Final considerations
Geomorfologia e tectônica da Formação
Association of Petroleum Geologie Bulletim
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