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BIBTEX RIS

CARACTERIZAÇÃO DO SUBSTRATO DE RECIFES DE CORAIS HOLOCÊNICOS A PARTIR DE DADOS DE SÍSMICA DE REFRAÇÃO E DE PERFURAÇÃO

1982; Sociedade Brasileira de Geologia; Volume: 12; Issue: 4 Linguagem: Inglês

10.25249/0375-7536.1982124531535

ISSN

2177-4382

Autores

Zelinda Margarida De A. N. Leão, Olivar A. L. de Lima,

Tópico(s)

Geological Modeling and Analysis

Resumo

Four seismic refraction profiles on the Coroa Vermelha Reef. Abrolhos Bank. revealed the presence of a wave-velocity disconformity. Diagenetic alteration observed on a drill core from the same site at about the depth of the disconformity indicates that such a surface, developed on a limestone reef. is due to processes related to subaerial exposure. This evidence of subaerial exposure correlated with the last Pleistocene low stand of sea level, plus the morphology of the subsurface sequence as well as its faunal composition indicate that the underlying substrate of the Holocene Coroa Vermelha Reef is a reef limestone of a probable Pleistocene age.

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