A Holocene Sedimentary Record from Lake Silvana, SE Brazil
Evidence for Paleoclimatic Changes from Mineral, Trace-Metal and Pollen Data
Seiten
1999
Springer Berlin (Verlag)
978-3-540-66205-1 (ISBN)
Springer Berlin (Verlag)
978-3-540-66205-1 (ISBN)
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.
Abstract.- Methods.- Results.- Discussion.- Conclusions.
| Erscheint lt. Verlag | 17.9.1999 |
|---|---|
| Reihe/Serie | Lecture Notes in Earth Sciences |
| Zusatzinfo | XII, 98 p. 51 illus. |
| Verlagsort | Berlin |
| Sprache | englisch |
| Maße | 155 x 235 mm |
| Gewicht | 258 g |
| Themenwelt | Naturwissenschaften ► Geowissenschaften ► Geologie |
| Naturwissenschaften ► Geowissenschaften ► Hydrologie / Ozeanografie | |
| Naturwissenschaften ► Geowissenschaften ► Meteorologie / Klimatologie | |
| Schlagworte | Brasilien • Brasilien; Geologie • Brazil • Climate • Erosion • Geochemistry • Holocene • Holozan • Holozän • Klima • Lake • Paläoklimatologie • Pollen • Pollenanalyse • pollen analysis • precipitation • Sediment • sediments • Sediment / Schwebstoffe • Seelandschaft • Seesedimente • Vegetation |
| ISBN-10 | 3-540-66205-7 / 3540662057 |
| ISBN-13 | 978-3-540-66205-1 / 9783540662051 |
| Zustand | Neuware |
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