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Our planet experienced many intervals of climate deterioration due to terrestrial causes, such as intensified volcanism and a very active tectonic regime or extraterrestrial causes. The later includes major meteorite impacts and change in the exosphere, mostly linked to the modification of sunlight amount leading to glaciations. The most sensitive organisms to climate changes are the marine planktonic ones, especially the coccoliths and dinoflagellates. This paper describes modification in the marine planktonic wo...

The Moldavian Platform represents the south-west margin of the East European Platform. To the south, the Moldavian Platform is bordered by the Scythian Platform and to the west by the Carpathians. The Moldavian Platform encloses many geological and paleontological sites of high scientific value, being well known for the Middle Miocene wide exposures, represented by the Paratethys stage Sarmatian. In this study, we present the geological and paleontological heritage of 6 natural reserves from the Moldavian Platform...

The Southern Dobrogea is situated in SE Romania, being included, tectonic point of view, in the Moesian Platform. The Southern Romania is bordered by the Danube to the West and the Black Sea to the East. In the N, the Southern Dobrogea is bordered by the Capidava-Ovidiu subcrustal fault; towards south, it continues to the northern Bulgaria. In the Southern Dobrogea, a carbonate platform developed from Mesozoic (Upper Jurassic and Cretaceous), and continued through the Paleogene up to the Miocene. The Pliocene is m...

The paper presents well-preserved microfaunas (foraminifers and ostracods) enclosed in cuttings samples and cores recovered by 6 hydrocarbon wells drilled in the Moesian Platform, in Silistea area, S Romania. The lithological and micropaleontological obtained data improve the stratigraphic knowledge at regional level. The analyzed samples contain foraminifera that characterize biozones extending in the Sarmatian, as follows: the middle Volhynian Varidentella reussi, the late Volhynian Elphidium reginum, the early ...

Development of passive margin, due to thermal cooling of the stretch lithosphere, creates a large accommodation space subsequently filled with sediments brought from the emerging continent once the river system is established [1]. This combination of rapid subsidence and sedimentation generates an instable architecture with large shelf progradation on top of early post-rift sediments [5]. Given the typical fine grain lithology of these deposits, in most of the cases they become overpressure and an ideally zone for...

The structure of the Romanian Western Black Sea shelf has been studied before 1970 and described in publications that serve today as an important point of reference in the structural geology and geotectonic studies. After the year 2005, a new set of gravimetric data has been acquired by the Romanian National Institute of Marine Geology and Geoecology, that has been obtained by compiling over 13.400 km of profile measurements on the Romanian and Bulgarian offshore. By combining this newer data with an analysis on t...

The calcareous nannoplankton represents a group of major components of the oceanic phytoplankton, situated at the base of the trophic chain. The evolution pattern of these organisms is relevant in the past geological record and nowadays, for several research fields, such as: marine biology, marine geology, biogeochemistry, micropaleontology, biostratigraphy as well as paleogeographic and paleoclimatic reconstructions, including the paleoenvironmental ones. Taking into account that the calcareous nannoplankton spec...

The oldest Romanian research focused on the Romanian Black Sea continental shelf was published in the volume The Sulina Arm. An outlet to sea (Danube European Commission, 1856). At the beginning of the 20th Century, The Marine Map ? Romania?s coastline was elaborated by Catuneanu. Additionally, biologists, geographers and geologists, such as Grigore Antipa, Ion Borcea, Constantin Bratescu, and Radu Ciocardel, among many others, initiated significant studies within the Romanian continental shelf in the first decade...

The first isolation of the Paratethys from the Tethys Ocean (that included the Mediterranean region), at the beginning of the Oligocene Epoch, at around 33 My (million years) led to significant palaeobiogeographical changes in Europe. The present day Romanian territory belongs, since the Oligocene and up to the Middle Miocene, to the Central Paratethyan domain and afterwards was included in the Eastern Paratethys. The palaeogeographical isolation, produced in the Eastern Carpathians at the Eocene-Oligocene boundar...