Produção Nacional
Beachrock de Jaconé, Maricá e Saquarema - RJ: importância para a história da ciência e para o conhecimento geológico
2011; Sociedade Brasileira de Geologia; Volume: 41; Issue: 2 Linguagem: Inglês
10.25249/0375-7536.2011412290303
ISSN2177-4382
AutoresKátia Leite Mansur, Renato Rodríguez Cabral Ramos, José Marcus Godoy, Vitor Manuel Rodrigues do Nascimento,
Tópico(s)Geotourism and Geoheritage Conservation
ResumoThe Caminhos de Darwin Project aims to redeem the episodes experienced by Charles Darwin in the state of Rio de Janeiro and that they have had part in his scientific training aboard the Beagle. In the geological approach of this project, the outcrops described by Darwin in the State of Rio de Janeiro are being described with purposes of geoconservation. The beachrock of Jaconé was identified by the naturalist, at then 23 years old, on April 9, 1832. Over the years, archaeological researches conducted in the region discovered pebbles of beachrock in the middens of Beirada and Moa. This fact demonstrates that this rock was already known by prehistoric men for over 4000 years BP. The present study aimed to assess these outcrops as geological heritage and, at the same time, update the knowledge about its geology. Three lithofacies were identified and two of them were analyzed petrographically. The age of the shells was calculated at 8198- 7827 cal BP by the radiocarbon method. The occurrence is constituted as a geological heritage of the following typologies: geomorphological, sedimentary, paleoenvironmental, petrological, and archaeological and, also, contextualized in the science history. It has international significance and scientific, cultural, educational and ecological value.
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