A Holocene sedimentary record from Lake Silvana, SE Brazil : evidence for paleoclimatic changes from 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 sed...
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| Format: | eBook |
| Language: | English |
| Published: |
Berlin ; New York :
Springer,
[1999]
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| Series: | Lecture notes in earth sciences ;
88. |
| Subjects: | |
| Online Access: | Connect to the full text of this electronic book |
| Summary: | 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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| Item Description: | Electronic resource. |
| Physical Description: | 1 online resource (xii, 96 pages) : illustrations, maps. |
| Bibliography: | Includes bibliographical references (pages [75]-85). |
| ISBN: | 9783540486794 (electronic bk.) 3540486798 (electronic bk.) |
| ISSN: | 0930-0317 ; |