| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000417589 |
| ISSN: | 0001-3765 |
| Authors: | Kuhn, Lidia A1 Souza, Paulo A1 Cancelli, Rodrigo R1 Silva, Wagner G1 Macedo, Renato B1 |
| Institutions: | 1Universidade Federal do Rio Grande do Sul, Instituto de Geociencias, Porto Alegre, Rio Grande do Sul. Brasil |
| Year: | 2017 |
| Season: | Dic |
| Volumen: | 89 |
| Number: | 4 |
| Pages: | 2581-2596 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | This paper presents a paleoenvironmental reconstruction from palynological analyses of a sedimentary core of Holocene age, drilled at municipality of Garopaba (Santa Catarina), Southern Brazil. A total of 46 samples was collected for palynological analyses in the 450 cm-long core PCSC-3, as also three samples for radiocarbon dating and granulometric analyses. The palynological content includes 84 taxa related to pollen grains of angiosperms (38) and gimnosperm (3), spores of pteridophyta (16) and bryophyta (2), spores of fungi (8), algae (3), acritarchs (3), dinoflagellate cysts (2) and microforaminiferal linings (1). Three specimens of acritarchs are described and illustrated in detail. Three palynological phases were defined based on changes in assemblages: Phase I, Phase II and Phase III. The Phase I is characterized as a lagoonal paleoenvironment with marine influence from the beginning of the sedimentation (5390 cal yr BP), based on occurrences of acritarchs, dinoflagellate cysts and microforaminiferal linings. The Phase II (3032 yr BP until 858 cal yr BP) also is characterized by a lagoonal paleoenvironment, however, presented decrease in percentage of marine elements and increase in freshwater algae record, suggesting less marine influence in the lagoonal body. In Phase III (last 856 years), underwater sedimentation prevailed, under swamp-like conditions |
| Disciplines: | Geociencias, Biología |
| Keyword: | Paleontología, Paleoambiente, Análisis palinológico, Fisiografía, Planicie costera, Holoceno, Brasil |
| Keyword: | Paleontology, Paleoenvironments, Palynological analysis, Coastal plains, Physiography, Holocene, Brazil |
| Full text: | Texto completo (Ver HTML) |
