Global ETD Search
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Showing 1 to 20 of 23 for “"paleoecologia"”.
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Palinoestratigrafia e paleoecologia da sequência lacustre do cretáceo inferior, em Serra Negra - PE, Bacia Sedimentar do Jatobá, NE do Brasil
O presente estudo baseou-se na análise palinológica de uma sondagem com 90,50 m, denominada 2 JSN-01-PE, na Serra Negra, Ibimirim, PE, realizada pelo Projeto Rede 07 - Caracterização Geológica e Geofísica de Campos Maduros – Fase 4, Convênio 01.07.0721.00 – FINEP/UFPE. Foram analisados 122 níveis …
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Análise estratigráfica dos sedimentos eo/mesodevonianos da porção ocidental da Bacia do Amazonas sob a ótica da estratigrafia de seqüências no interior cratônico
… da Paleogeografia, do Paleomagnetismo e da Paleoecologia, através do estudo da Tectônica e do Clima atuantes no Eo/mesodevoniano, no Supercontinente Gondwana, retratadas em reconstituições do mundo devoniano e apoiada em extensiva consulta bibliográfica e em correlação com os conteúdos …
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Dati geochimici ed ecologici di foraminiferi planctonici. Implicazioni paleoceanografiche in due aree chiave: Oceano Meridionale e Mare Mediterraneo.
La studio della distribuzione spaziale e temporale della associazioni a foraminiferi planctonici, campionati in zone con differente regime idrografico, ha permesso di comprendere che molte specie possono essere diagnostiche della presenza di diverse masse d’acqua superficiali e sottosuperficiali e …
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High-resolution stratigraphy of Central and Southern Adriatic Quaternary deposits of sub-Milankovian climate change on Mediterranean circulation
This volume is a collection of the work done in a three years-lasting PhD, focused in the analysis of Central and Southern Adriatic marine sediments, deriving from the collection of a borehole and many cores, achieved thanks to the good seismic-stratigraphic knowledge of the study area. The work …
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PCO2 EFFECTS ON THE PRODUCTION OF PELAGIC BIOGENIC CARBONATE AND OCEAN CHEMISTRY: A CASE HISTORY FROM THE CRETACEOUS.
In the early Aptian, ocean experienced a global phenomenon of widespread deposition of organic carbon-rich sediments under oxygen-poor conditions, named the Oceanic Anoxic Event 1a (OAE1a) (~120 Ma) which has its sedimentary expression in the Selli Level. OAE1a represents a profound perturbation of …
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BIOMINERALIZATION AND GLOBAL CHANGE: BIOTIC RESPONSE TO THE GONDWANAN GLACIATION AND SUBSEQUENT CLIMATE WARMING
The late Palaeozoic, a time-interval of roughly 100 million years comprising the Carboniferous and the Permian, has been the theatre of dramatic climate changes. Starting from greenhouse climatic conditions, this time-interval witnessed the transition to icehouse conditions in the late Visean, with …
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Hábitos de vida dos trilobitas das formações Maecuru e Ererê (Devoniano), Bacia do Amazonas
Fourteen species of trilobites were identified from the Maecuru Formation and one from Ererê Formation (Devonian, Amazon Basin), sampled at Pará State, Brazil. Seven species from the Maecuru Formation and the species from the Ererê Formation were submitted to the morph functional analysis, because …
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Taphonomy and Palaeoecology of multi-element skeleton invertebrates: a genetic model for exceptional preservation
The aim of the research is to improve the understanding on the origin of fossil accumulations by investigating their taphonomic and sedimentological features and by using stratigraphic data and the autecology of the organisms forming the shell beds. A number of highly different oligospecific high …
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Stratigraphy and Palaeontology of the Late Cretaceous Wapiti Formation, west-central Alberta, Canada
A complete stratigraphic assessment and revision of the middle Campanian to upper Maastrichtian Wapiti Formation in north-western Alberta and north-eastern British Columbia is the main aim of this research project. The study area encompasses an area of approximately 200X180 km in the Grande Prairie …
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NETWORK THEORY IN ICHNOLOGY: FROM BEHAVIOURAL TOPOLOGY TO THE DEPOSITIONAL ENVIRONMENT
This study aims to (1) develop quantitative approaches for the study of ichnological systems; (2) model, for the first time, ichnosites as networks; (3) analyze the response of ichnological systems to global dynamics, with particular regard to Late Paleozoic fluvial-influenced settings. In this …
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Evoluzione naturale ed impatto antropico sui sistemi costieri della Penisola del Sinis (Sardegna centro occidentale)
All over the world the coastal strip has suffered over the centuries the presence and the activities of the human beings: the historical needs of defending the countries from the invasions and to exploit natural resources for subsistence, have caused significant impacts on coastal environments, …
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