A Holocene Sedimentary Record from Lake Silvana, SE Brazil - Evidence for Paleoclimatic Changes for Mineral, Trace-Metal and Pollen Data

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.

List of contents

Abstract.- Methods.- Results.- Discussion.- Conclusions.

Product details

• Authors: German Müller, Saul Rodrigues-Filho, Saulo Rodrigues-Filho
• Publisher: Springer, Berlin
• Languages: English
• Product format: Paperback / Softback
• Released: 01.01.1999
• EAN: 9783540662051
• ISBN: 978-3-540-66205-1
• No. of pages: 98
• Weight: 254 g
• Illustrations: XII, 98 p. 51 illus.
• Series: Lecture Notes in Earth Sciences; Lecture Notes in Earth Sciences
• Subject: Natural sciences, medicine, IT, technology > Geosciences > Geology