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.
Highlights
The paleoclimatic variations and the sea level oscillations modelled the coastal areas worldwide in the Quaternary, resulting in significant sedimentary changes on the Southern Coastal Plain of Brazil
This study presents the results of a palynological analysis performed from the 450 cmlong core PCSC-3 collected in the Coastal Plain of Santa Catarina
The lowermost level (430 cm) has the age 5390 cal yr BP, while the sample at 360 cm depth was dated at 3756 cal yr BP
Summary
The paleoclimatic variations and the sea level oscillations modelled the coastal areas worldwide in the Quaternary, resulting in significant sedimentary changes on the Southern Coastal Plain of Brazil. The record of certain marine palynomorphs and the analysis of their frequency and relative abundance in comparison with continental palynomorphs are commonly used as proxies for the delimitation of transgressive and regressive sea level events This has been done for Brazilian (e.g., Cordeiro and Lorscheitter 1994, Behling and Negrelle 2001, de Oliveira et al 2005, Meyer et al 2005a, b), Southern South American (e.g., Vilanova et al 2006, Borremei and Quattrocchio 2007, Quattrocchio et al 2008, Mourelle et al 2015) and other continents (e.g., de Vernal and Giroux 1991, de Vernal 2009, Mudie et al 2011, Richards et al 2014), in most cases integrated with other tools of analysis, such as the sedimentology and geochronological calibration
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
