Embasamento (geologia)







Afloramento de gnaisse, rocha pertencente ao embasamento cristalino, Escócia.


Em geologia, Embasamento cristalino é o conjunto de rochas ígneas ou metamórficas que compõe a porção externa da crosta continental.[1] Estão abaixo da plataforma sedimentar ou cobertura. De maneira mais ampla o embasamento representa qualquer rocha abaixo de rochas sedimentares ou bacias sedimentares, que são ígneas ou metamórficas em origem.





Pão de Açucar, Rio de Janeiro. O Pão de Açúcar e os morros adjacentes são compostos por gneisses e granitos pertencentes ao embasamento cristalino.



Referências




  1. ↑ Duarte, O. O. (2003) Dicionário enciclopédico Inglês-Português de geofísica e geologia. 2ª ed. - Rio de Janeiro: SBGf, 2003. p. 352. ISBN 85-88690-07-1.



Ver também |




  • Cráton.


  • Crosta continental.


  • Escudo cristalino.



  • Portal da geologia




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