1,721,017 research outputs found
Biostratigraphical characteristics of the Turonian-?Maastrichtian p.p. (Upper Cretaceous) deposits in the Simbruini-Ernici Mts. (central Apennines, Italy)
No full textThe biostratigraphical characteristics of three sequences outcropping in the Simbruini-Ernici Mts. are discussed in order to reconstruct the lithobiofacies evolution of the Central-Western Latium-Abruzzi carbonate platform during the Turonian-? Maastrichtian p.p.. For each section the macro- and microbiofacies are discussed, with the former characterized by the presence of rudists (Hippuritoida). The occurrence in the neighborhood of some fossiliferous beds of particular biostratigraphical value, us to make correlations with other areas. -Author
Analisi di facies del Cretacico dei Monti Simbruini-Ernici e delle aree limitrofe (Appennino centrale): considerazioni tettono-eustatiche
No full textLate Cretaceous rudist facies distribution in southern Apennines and in Apulia, Italy
No full textUpper Cretaceous carbonate sediments characterized by rudist bivalves are extensively distributed in southern Apennines and in Apulia (southern
Italy) and they may be roughly grouped into inner and outer carbonate platform deposits. The fossils, sparsely distributed within these shallow water
sediments, are more numerous and diversified in the outer platform settings where they consist predominantly of bivalves (mainly rudists) and,
subordinately, of gastropods (mainly nerineids), corals, and benthic microfossils. Locally, crustaceans (crabs), ammonites and planktic organisms
have also been found in some localities of Apulia. In this work, three main time intervals (Cenomanian-Turonian, Coniacian-Campanian p.p. and
Campanian p.p.-Maastrichtian.) have been investigated having in mind that taxonomic and sistematic questions regarding rudist palaeontology are
still unresolved. Each one is characterized by specific fossil associations and by peculiar sedimentary characters. These intervals correspond to the
main depositional systems recognized in the evolution of the peri-Tethyan carbonate platforms, whose development was controlled by tectonics
and/or eustasy
Il Senoniano a rudiste (Hippuritacea) del settore sudoccidentale della Piattaforma carbonatica laziale-abruzzese (Appennino centrale)
No full textGiacimenti fossiliferi a Hippuritidae e Radiolitidae (Hippuritacea) in Italia centro-meridionale
No full text
Paleobiogeographic distribution of Rudist bivalves (Hippuritida) in the Oxfordian-early Aptian (Late Jurassic–Early Cretaceous)
No full textIn the Late Jurassic and Cretaceous the warm shallow water seas were marked, within benthic marine organisms, by rudist bivalves, a peculiar group of mollusks that originated in the Late Jurassic and became extinct at the end of the Cretaceous. In this paper their global distribution in neritic carbonates is considered since their first appearance in the middle Oxfordian up to the first main extinction event at the end of the early Aptian. The information and data regarding global rudist occurrences throughout neo-Tethys and paleo-Pacific oceans are critically reprised from literature and organized in an Oxfordian-early Aptian Rudist database (OXAP_RDB) that encompasses 235 rudist-bearing localities all across the world, with 845 total rudist occurrences, 34 valid genera and 148 species. Actual rudist geographic distribution is investigated in order to contribute to the identification of the paleobiogeographic pattern of these benthic organisms in the paleoclimatic and paleogeographic setting of neo-Tethys and paleo-Pacific oceans, allowing to reconstruct dispersal patterns and to define four broad paleobiogeographic Provinces in the Barremian–early Aptian
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