Submerged lithologies as indicators of relative sea-level oscillations in Rio Grande do Norte, NE Brazil

Viviane Testa, Daniel Bosence, M L Vianna

Research output: Contribution to conferencePaperpeer-review


Investigation of the Rio Grande do Norte inner shelf has revealed the occurrence of various submerged and emergent outcrops of lithified Quaternary sediments. These outcrops comprise a number of lithologies and are found forming low coastal cliffs and areas of lithified seafloor up to 30 km offshore. These rocks provide valuable information on the various depositional events and Quaternary evolution of the area. The rocks are described on the basis of their composition, diagenesis and 14C dating. Coastal lithologies are characterized by bioclastic grainstones-packstones, whilst offshore lithologies are characterized by bioclastic packstones and four types of carbonate cemented sandstones; the latter extending regionally from Ceará to the south Pernambuco shelf. Since the formation of these deposits and the present-day various high frequency sea-level changes have effected this coastal region.
Original languageEnglish
Number of pages6
Publication statusPublished - 1997
Event6º Congresso da ABEQUA e Reunião sobre o Quaternário da América do Sul - Curitiba, Brazil
Duration: 27 Jul 19973 Aug 1997


Conference6º Congresso da ABEQUA e Reunião sobre o Quaternário da América do Sul

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