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Identifier uch.biology.msc//2002zidianakis
Title Η απολιθωμένη χλωρίδα της λεκάνης των Βρυσών - Συνεισφορά στη γνώση του παλαιοκλίματος και του παλαιοπεριβάλλοντος του άνω Μειόκαινου της δυτικής Κρήτης
Creator Zidianakis, John
Abstract In spite of great paleobotanical interest, the Neogene floras of Crete have nοt studied enough yet. Therefor a systematical investigation of Neogene sedimentary stones all over the island was undertaken in order to discover new assemblages of terrestrial plant macro-remains. Finally a rich late Miocene leaf flora was discovered near Vrysses village in the western part of Crete. The examination of the plant material allowed to yield a detailed picture of the Vrysses paleoflora and contributed to a better understanding of Neogene climate and vegetation in Crete and entire Eastern Mediterranean. The plant remains were contained in an alternation of marl and limestone layers which embedded in shallow marine plains 6-7 million years ago. The main part of the fossil material was collected during our excursions at the fossiliferous sites. After proper handle and careful cleaning the samples were studied and identified. About 50 different taxa of macroscopic plant remains (only impressions) have been identified. The majority of Vrysses paleoflora indicates a subtropical to warm temperate affinity and is considered as typical of the European Neogene. Most of the samples come from angiosperms where the deciduous taxa dominate on laurophyllous while a remarkable amount of sklerophyllous xeromorphic elements is identified. In order to estimate the basic parameters of paleoclimate two different methods have been applied? leaf margin analysis and nearest living relatives. The results indicate that Vrysses climate in the upper Miocene was warm and humid while arid phases weakly developed were periodically presented. Using the climatic classification of K?ppen Vrysses paleoclimate is arranged between Cfa and Csa climate. In addition considering the locality-specific characteristics of modern plant associations which are related to the fossil Vrysses flora, a regional vegetation model is developed. Vrysses plant assemblage indicated that the area was covered mainly by wood plant bioms (forests) and characterized by a floristic differentiation based on altitude and water efficiency. A comparison of published Neogene Greek floras indicates that the paleoflora of Vrysses is in matter of physiognomy and floristic composition very close to the Upper Miocene flora of Makrilia in Eastern Crete, although Makrilia flora is richer with more tropical elements.
Issue date 2002-07-01
Date available 2002-10-18
Collection   School/Department--School of Sciences and Engineering--Department of Biology--Post-graduate theses
  Type of Work--Post-graduate theses
Permanent Link https://elocus.lib.uoc.gr//dlib/0/3/2/metadata-dlib-2002zidianakis.tkl Bookmark and Share
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