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PALINOFÁCIES E PROCESSOS DEPOSICIONAIS EM SEDIMENTOS DE FUNDO DA LAGOA DOS QUADROS, PLANÍCIE COSTEIRA DO RIO GRANDE DO SUL, BRASIL

2006; Sociedade Brasileira de Geologia; Volume: 36; Issue: 4 Linguagem: Inglês

10.5327/rbg.v36i4.1245

2317-4889

Karin Elise Bohns Meyer, Paulo A. Souza, Mário Ricardo Cwik, Taíssa Rêgo Menezes, Francisco Sekiguchi Buchmann,

Geography and Environmental Studies

This study is based on the qualitative and quantitative characterization of particulate organic matter (palynomorphs, opaque phytoclasts, non-opaque phytoclasts and amorphous organic matter-AOM) and statistic methods of analysis from bottom sediments of Quadros Lake, of Rio Grande do Sul Coastal Plain. These data provided the identification of five palynofacies, with paleoenvironmental significance. Palynofacies A, with equivalent particulate organic matter among the four groups is associated to processes of gradational suspension; Palynofacies B and C represent fluvial influx control, with percentual differences between the groups; Palynofacies D, predominantly comprised of AOM and opaque phytoclasts is correlated to suspension and traction processes; suspension processes are attributed to Palynofacies E, with AOM and palynomorphs predominance. The results have shown the potential of palynofacies analysis through the interpretation and reconstitution of environments.