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Showing 1 to 17 of 17 for “"GEO/01 Paleontologia e paleoecologia"”.
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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
… climatic cyclicity (foraminifers’ assemblages), geochemistry (oxygen stable isotope, made out on planktic and benthic records), paleomagnetism, radiometric ages (14C AMS), teprhochronology, identification of sapropel-equivalent levels (Se). It’s worth to note the good consistency between the …
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PCO2 EFFECTS ON THE PRODUCTION OF PELAGIC BIOGENIC CARBONATE AND OCEAN CHEMISTRY: A CASE HISTORY FROM THE CRETACEOUS.
… (calcareous nannofossils) and geochemical (Re-Os isotopes, C and O stable isotopes) approach. Calcareous nannoplankton, responsible for primary productivity and effective producers of calcite, affect the C-cycle on both long- and short-term time scales. They are sensitive to …
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Stratigraphy and Palaeontology of the Late Cretaceous Wapiti Formation, west-central Alberta, Canada
… have been documented integrating several geological disciplines, including sequence stratigraphic methods, well-log signatures, facies analysis, and fossil associations. On the whole, particular attention has been given to 1) age and nature of both basal and upper contacts of the Wapiti …
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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)
… The first, primarily through a series of geomorphological, sedimentological and multi gave reliefs have allowed to determine the current status of the environments in study, both for the natural characteristics both for their direct interaction with the human activities. The latter mainly …
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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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MISSISSIPPIAN MUD MOUNDS OF DERBYSHIRE (ENGLAND, UK): FACIES ARCHITECTURE AND BIOTIC EVOLUTION
Mud mounds are carbonate buildups, part of the reef spectrum, consisting dominantly of carbonate mud, with no or minor skeletal framework. The carbonate mud commonly shows texture (clotted peloidal, homogeneous with primary cavities), indicative of an origin through in-situ precipitation by …
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Selected Famennian (Late Devonian) events (Condroz, Annulata, Hangenberg) in Sardinia and in the Carnic Alps: conodont biostratigraphy, magnetic susceptibility and geochemistry.
… magnetic susceptibility and the major elements geochemistry (Al, Si, K and Ti) have been investigated to study the evolution of the detrital input across the events. Six different section were studied in two different areas of North Gondwana where the Famennian rocks are well exposed. Two …