Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"Oligocene-Miocene"”.
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Sequence Stratigraphy and Depositional Controls on Oligocene-Miocene Caribbean Carbonate-Dominated Systems, Puerto Rico and the Dominican Republic
… on 87Sr/86Sr-derived mean ages for selected Oligocene-Miocene carbonate and siliciclastic units in Puerto Rico and the Dominican Republic. Results indicate ages of middle-late Oligocene to late Miocene (ca. 29.78–5.88 Ma) and show some significant modifications to previous chronostratigraphic …
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Subsurface mapping and 3D flexural modeling of the Putumayo foreland basin, Colombia
… of older, Jurassic half-grabens during the late Miocene; 2) the 45-Km-wide, Central structural zone characterized by moderately-inverted Jurassic half-grabens; and 3) the 120-Km-wide, Eastern zone characterized by the 90-Km-wide, N-S trending Caquetá arch with a few slightly inverted normal …
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Using 3D geodynamic slab models in tectonic reconstruction
… Indian continent, around the time of the Oligocene-Miocene boundary. Rapid rollback of the Pamir slab ahead of the advancing Indian continent explains current available evidence for extension and exhumation during an episode of large-scale collisional tectonics in the Miocene.
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Using 3D geodynamic slab models in tectonic reconstruction
… Indian continent, around the time of the Oligocene-Miocene boundary. Rapid rollback of the Pamir slab ahead of the advancing Indian continent explains current available evidence for extension and exhumation during an episode of large-scale collisional tectonics in the Miocene.
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On the phylogeny and diversity of the microsoroid ferns (Polypodiaceae)
… of new geographic regions during the Oligocene-Miocene periods.
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Geochemical Insights into Crustal Melting in the Bhutan Himalaya
… tectonic evolution. In the Himalaya, multiple Oligocene-Miocene leucogranite bodies intrude the Greater Himalayan Series (GHS), a lithotectonic package of high-grade metamorphosed sediments. This package is underthrust by a chemically distinct metasedimentary package, the Lesser Himalayan …
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Structural settings inferred from gravity, magnetic and seismic data for Durban Basin, east coast offshore of South Africa
… thickness, pick horizons (basement, 1AT1, 17AT1, Oligocene/Miocene and seafloor), the followings were applied to gravity, magnetic and seismic 2D data to improve data interpretation: 1) Filters were applied to gravity and magnetic data i.e. reduced to the pole (RTP), 1st order horizontal …
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Nature and Potential Origins of the Low-Rate Tectonics of the Hauraki Rift and North-Western New Zealand: A Geophysical Investigation
… Lord Howe Island) is mechanically separated. A Oligocene-Miocene tectonic model detailing the westward collision of the Loyalty-Three Kings arc and subsequent opening of the Norfolk Basin is presented. This model proposes that the relative motion between the Australian and "East Australian" …
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Advanced methods for analysing and modelling multivariate palaeoclimatic time series
… data sets clearly correlates with the Oligocene/Miocene transition about 24 million years before present as well as regional deglaciation events. Grain-size distributions in sediments give information about the predominance of different transportation as well as deposition mechanisms. …
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The mio-eugeosynclinal thrust interface and related petroleum implications in the Sason-Baykan Area, Southeast Turkey
… rocks are not Upper Cretaceous-Paleocene but of Oligocene-Miocene age. Radioactive age determination of two spilite samples from this series confirmed this result. These facts suggest that eugeosynclinal conditions and submarine basic volcanic activity persisted until the end of Miocene in the …
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Individuazione di eventi climatici globali nella successione Oligo-Miocenica del Settore Occidentale dell’Avampaese Ibleo (Sicilia SE) attraverso uno studio di stratigrafia integrata
… recente ridefinizione dei GSSPs dei piani del Miocene, ed è stato possibile vincolare temporalmente le numerose discontinuità che affliggono la successione, tutt’altro che continua, nonchè di stimare la durata degli hiatus ad esse associati. Il principale risultato del lavoro effettuato …
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Patterns and processes in animal evolution : molecular phylogenetics of Southern Hemisphere fauna : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Genetics
… proposed marine inundation of New Zealand in the Oligocene, the asteroid impact at the K – Pg boundary, and the continental breakup of Gondwana. It investigates what impact these events had on species diversification by studying the phylogenetic relationships of two groups of taxa – the family …