| A Holocene Sedimentary Record from Lake Silvana, Se Brazil: Evidence for Paleoclimatic Changes from Mineral, Trace-Metal and Pollen Data Contributor(s): Rodrigues-Filho, Saulo (Author), Müller, German (Author) |
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ISBN: 3540662057 ISBN-13: 9783540662051 Publisher: Springer OUR PRICE: $52.24 Product Type: Paperback - Other Formats Published: October 1999 |
| Additional Information |
| BISAC Categories: - Nature | Weather - Medical - Science | Earth Sciences - Geology |
| Dewey: 551.698 |
| LCCN: 99040868 |
| Series: Lecture Notes in Earth Sciences |
| Physical Information: 0.23" H x 6.14" W x 9.21" (0.37 lbs) 98 pages |
| Descriptions, Reviews, Etc. |
| Publisher Description: 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. |