1,721,173 research outputs found
Biostratigrafia a nannofossili, biocronologia e cronostratigrafia della serie del Torrente Tiepido (Subappennino Emiliano - Provincia di Modena).
No full textCalcareous nannofossil biostratigraphy of DSDP Site 132 Leg 13 ( Tyrrhenian Sea - western Mediterranean).
No full textIt was possible to recognize 5 nannofossil biozones in the Pliocene and 3 biozones in the Pleistocene, defined by simple and widely spread forms. In the studied succession, characterized by good nannofossil contents and no reworking at all, it is possible to further subdivide these zones in a rather simple way, thus obtaining 7 biostratigraphic intervals (zones and subzones) in the Pliocene and 6 intervals in the Pleistocene. The adopted subdivision for the latter is practically superimposable on the recent zonation proposed by Gartner in oceanic sediments
Il limite Plio - Pleistocene nella serie del Torrente Crostolo - Torrente Vendina (Provincia di Reggio Emilia - Italia Settentrionale).
No full textNannoplancton calcareo del Pliocene Superiore - Pleistocene Inferiore della serie del Fiume Santerno.
No full textNuove osservazioni sulla distribuzione del nannoplancton calcareo nella serie di Le Castella (Calabria).
No full text
Coccolithus pelagicus (Wallich): a paleotemperature indicator in the Late Pliocene Mediterranean deep sea record.
No full textPLIOCENE-PLEISTOCENE CALCAREOUS NANNOFOSSIL DISTRIBUTION PATTERNS IN THE WESTERN MEDITERRANEAN
No full textThe distribution patterns of stratigraphically important calcareous nannofossils have been established in the Pliocene-
Pleistocene of Site 653 sequence (Tyrrhenian Sea, Western Mediterranean). Semiquantitative and quantitative
methods have been used to verify and improve biostratigraphic reliability of the nannofossil datums. Over twenty calcareous
nannofossil events are considered reliable'for biostratigraphic correlations based on the results of this study.
Many of these events are not used in the existing zonal schemes, which rely, for the early Pliocene, upon events not easily
detectable in the Mediterranean record. The need for a local zonal scheme is stressed for attaining a reproducible and
highly resolved biostratigraphic classification. The zonal scheme we suggest provides an average time resolution of
about 0.5 m.y. in the Pliocene and of about 0.2 m.y. in the Pleistocen
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