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

Abstract (English)

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 identi?cation of ?ve palynofacies, with paleoenvironmental signi?cance. Palynofacies A, with equivalent particulate organic matter among the four groups is associated to processes of gradational suspension; Palynofacies B and C represent ?uvial in?ux 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.