mhorn | Дата: Thursday, 19.11.2009, 21:05 | Сообщение # 1 |
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| Chiocchini M., Chiocchini R.A., Didaskalou P., Potetti M. (2008) Microbiostratigrafia del Triassico superiore, Giurassico e Cretacico in facies di piattaforma carbonatica del Lazio centro-meridionale e Abruzzo: revisione finale // Mem. Descr. Carta Geol. d’It. LXXXIV. P.5-170., figg. 31, tabb.16, tavv. 52 Pdf text: http://www.apat.gov.it/site....fia.zip Pdf plates: http://www.apat.gov.it/site....ole.zip A revision of previous biostratigraphic schemes of the Upper Triassic, Jurassic and Cretaceous carbonate facies in the Central-Southern Latium and Abruzzi (CHIOCCHINI & MANCINELLI, 1977; 1978; CHIOCCHINI et alii, 1994) is proposed. These schemes have been used for the biostratigraphy of numerous sheets of the Geological map of Italy, 1:50.000 scale (389 “Anagni”, 359 “L’Aquila”, 360 “Torre dei Passeri”, 368 “Avezzano”, 369 “Sulmona”, 358 “Pescorocchiano”, 402 “Ceprano”, 349 “Gran Sasso d’Italia”). They allowed to propose correlations between carbonatic successions cropping out in the above mentioned areas. The revision has been necessary to rectify some imperfections, to define the boundaries and features of all biostratigraphic units and to correct some details of paleontological nomenclature of benthic foraminifera and calcareous algae. Micropaleontological studies allowed to recognize fiftytwo biozones and four subzones, which may be ascribed to well differentiated depositional paleoenvironments of the carbonate platform: “paleoplatform” (sensu CHIOCCHINI & MANCINELLI, 1977), inner - back edge, edge and slope of the Latium-Abruzzi platform. The above mentioned biostratigraphic units are formally described. The mean part of the biozones and subzones are described by 208 microfacies. Finally the relationships between biozonation criteria and mean advanced theories for the Mesozoic paleogeography and tectonic evolution of the central Mediterranean region ( TURCO et alii, 2007) have been highlited.
Middle Jurassic - Lower Cretaceous ammonites & aptychi
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