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3 produkter
Del 88 - Lecture Notes in Earth Sciences
Holocene Sedimentary Record from Lake Silvana, SE Brazil
Evidence for Paleoclimatic Changes from Mineral, Trace-Metal and Pollen Data
Häftad, Engelska, 1999
536 kr
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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, 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.
550 kr
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Umweltgeologie im weiteren Sinne hat sich inzwischen als Arbeitsgebiet jenseits fachlicher Zuordnungen etabliert. Arbeitsmethoden einer Vielzahl naturwissenschaftlicher Richtungen werden an Hochschulen, in Institutionen und Firmen erfolgreich eingesetzt, um Umweltprobleme vielfaltiger Art zu bearbeiten. Im vorliegenden Werk wird zum ersten Mal die Breite der Ansatze anhand konkreter Beispiele, die den hohen Stand der Forschung und deren Umsetzung dokumentieren, gezeigt. Globale und lokale Aspekte der Umweltgeowissenschaften werden mit Hilfe von Beitragen aus den Bereichen Boden- und Grundwasserschutz demonstriert. Somit bietet das Buch Studenten, Wissenschaftlern, aber auch Praktikern aktuelle Informationen zum Stand der Forschung sowie zu neuen Verfahren und Interpretationsmoglichkeiten.
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In the field of sedimentary research, ever increasing emphasis has been put on the investigations of carbonates and carbonate rocks during the past 30 years. It is thus quite natural that in Central Europe - where c1assical carbonate in vestigations have already been carried out 100 years ago - numerous scholars turned to the study of this sediment type. On the occasion of a visiting professorship of G. M. FRIEDMAN at the Labora torium für Sedimentforschung, Heidelberg University, a seminar on "Recent Developments of Carbonate Sedimentology in Central Europe" was held in July 1967. 90 persons involved in carbonate investigations participated, and 35 lectures were held. The present volume contains 30 papers summarizing the different subjects of the seminar. Of course these contributions only represent a small part of the work actually performed in the field of carbonate research in Central Europe. We believe, however, that they give a general survey of the work and the working methods employed in the different sectors of carbonate investigations. One of the purposes of the present symposium is to acquaint the English speaking countries with our recent results which usually - due to the language barrier - are not accessible to them.