We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Upper Pleistocene to Holocene peatland evolution in Southern Brazilian highlands as depicted by radar stratigraphy, sedimentology and palynology
- Authors
de Oliveira, Marcelo Accioly Teixeira; Porsani, Jorge Luis; de Lima, Gisele Leite; Jeske-Pieruschka, Vivian; Behling, Hermann
- Abstract
Abstract: Paleoenvironmental interpretation of proxy data derived from peatlands is largely based upon an evolutionary model for ombrotrophic bogs, in which peat accumulates in still environments. Reports on proxies obtained from minerotrophic fens, where hydrologic inputs are variable, are less common. In this study, a highland peatland in southern Brazil is presented through ground penetrating radar (GPR) and sedimentological, palynological and geochronologic data. The radar stratigraphic interpretation suggests a relatively complex history of erosion and deposition at the site since the beginning of Marine Isotope Stage 3 (MIS 3) interstadial period. In spite of this, radar stratigraphic and palynologic interpretations converge. Electromagnetic reflections tend to group in clusters that show lateral coherence and correlate with different sediment types, while pollen grains abound and are well preserved. As a result, the study of minerotrophic fens provides a source of proxies, suggesting that ombrotrophic bogs are not the only reliable source of data in wetlands for palynological analysis.
- Subjects
BRAZIL; PEATLANDS; PLEISTOCENE Epoch; UPLANDS; SEDIMENTOLOGY; PALYNOLOGY; GROUND penetrating radar
- Publication
Quaternary Research, 2012, Vol 77, Issue 3, p397
- ISSN
0033-5894
- Publication type
Article
- DOI
10.1016/j.yqres.2011.12.006