A Holocene Sedimentary Record from Lake Silvana, SE Brazil
Rodrigues-Filho, Saulo, Müller, German
Produktnummer:
18c1eedc5f55df40edbb1b5512bdaf3ee4
| Autor: | Müller, German Rodrigues-Filho, Saulo |
|---|---|
| Themengebiete: | Brasilien Brazil Erosion Holozan Klima Pollenanalyse Precipitation Seesedimente climate geochemistry |
| Veröffentlichungsdatum: | 17.09.1999 |
| EAN: | 9783540662051 |
| Sprache: | Englisch |
| Seitenzahl: | 98 |
| Produktart: | Kartoniert / Broschiert |
| Verlag: | Springer Berlin |
| Untertitel: | Evidence for Paleoclimatic Changes from Mineral, Trace-Metal and Pollen Data |
Produktinformationen "A Holocene Sedimentary Record from Lake Silvana, SE Brazil"
Mineralogical-sedimentological and geochemical investigations in combination with pollen data of a 12.7-m-long dated sediment core from Lake Silvana, SE Brazil, permit the reconstruction of the climatic history over the past 10,000 years. The lowermost section (I) reflects a coarse paleosol-type sediment with abundant plant debris and rootlets; pollen indicates grassland vegetation. Section II represents fine-grained lake sediments; pollen indicates a savanna-like vegetation. Section III represents a pollen-free, coarse-grained allogenic sediment deposited under high transportation energy (increased precipitation). Section IV, a greenish sequence with increasing C content towards the top, has a pollen spectrum of present-day vegetation (semideciduous forest). The different sediment sections show a connection with erosional phases in the catchment of the lake, based on mineralogy and geochemistry, which are a response to climate development.
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