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| PEREIRA,NATAN S.; MANSO,VALDIR A.V.; MACEDO,RENÊ J.A.; DIAS,JOÃO M.A.; SILVA,ADRIANA M.C.. |
| Located 266 km offshore Brazilian coast, Rocas Reef complex is the only atoll in the South Atlantic. Two scientific expeditions carried out detailed sedimentological studies of the complex. Sand texture was dominant in the sedimentary environment, although other textures such as gravel, sandy gravel and gravelly sand, were also observed. Mean size ranged from fine sand to coarse sand (-1.23 to 2.34ø), with an average value of 0.69ø (sand fraction), which from a geological perspective represents a high-energy environment. The values of mean size varied in the different geomorphologic compartments, a response to variable hydrodynamics on the reef. Sorting ranged from very well sorted to poorly sorted, with a mean value of 0.97ø (moderately sorted). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biogenic particles; Carbonate sediments; Atoll reef; Sedimentological parameters. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100057 |
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