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A Holocene Sedimentary Record from Lake Silvana, SE Brazil - Evidence for Paleoclimatic Changes from Mineral, Trace-Metal and Pollen Data (Paperback)
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A Holocene Sedimentary Record from Lake Silvana, SE Brazil - Evidence for Paleoclimatic Changes from Mineral, Trace-Metal and Pollen Data (Paperback)
Series: Lecture Notes in Earth Sciences, 88
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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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