Essays about: "Paleozoikum"
Found 5 essays containing the word Paleozoikum.
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1. Geobiological Impacts of PalaeozoicLand Plant Evolution
University essay from Uppsala universitet/PaleobiologiAbstract : For two centuries, questions about the origin of terrestrial plants and their impacts on the Earth systemhave occupied palaeobotanists. This essay attempts to synthesise the state of research to date, and outlineareas where major questions remain. READ MORE
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2. Cr-spinels in the Franklinian Mobile Belt : a geochemical record of Paleozoic tectonics
University essay from Stockholms universitet/Institutionen för geologiska vetenskaperAbstract : The chemical compositions of Cr-spinel extracted from mafic and ultramafic rocks collected on Ellesmere Island in the Arctic Canadian Archipelago were obtained through electron microprobe analyses. The extensively altered rocks are sampled from rock units in the Franklinian MobileBelt, which is representative of a Paleozoic tectonically active oceanic regime of which little is presently known. READ MORE
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3. A geophysical survey (TEM; ERT) of the Punata alluvial fan, Bolivia
University essay from Lunds universitet/Geologiska institutionenAbstract : The Punata alluvial fan, situated in central Bolivia (Valle Alto) between the Altiplano and the lowlands, is an important aquifer for the local rural population. Due to rapid development and population growth in the area, the demand for fresh water has increased in recent year. READ MORE
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4. Study of the Taxonomy and the Inter and Intra Specific Variability of Phacopidae from the Lower Devonian of Algeria: Morphometric Approach and Meaning.
University essay from Uppsala universitet/Institutionen för geovetenskaperAbstract : An Algerian Phacopid fauna, described by Lemaître in 1952, is reexamined here. Species arereevaluated in order to be in agreement with modern taxonomy. To characterize the size and shape of our specimens, as well as inter- and intraspecific variations, a morphometric analysis was performed. Only holaspids were analyzed. READ MORE
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5. Linguliform Brachiopods from the terminal Cambrain to lower Ordovician Tiñu section, Mexico
University essay from Uppsala universitet/Paleobiologi; Uppsala universitet/UniversitetsbiblioteketAbstract : Tiñuformationen i Oaxaca, Mexiko är den enda fossilförande enheten från undre paleozoikum mellan den Laurentiska plattformen i nordvästra Mexiko och de Gondwanska lagerföljderna i Sydamerika. Det har nyligen visats att Tiñusektionen är en koncentrerad passiv kantlagerföljd med Gondwanakaraktär. READ MORE