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• W2002074637 abstract "A palynostratigraphical investigation in the Buchenstein Group, the Wengen Group, the San Cassiano Formation and the Raibl Group of the western Dolomites has resulted in a palynological characterization of the Ladinian Stage and the Cordevolian Substage of the Karnian in the classic type-region for these units of Triassic chronostratigraphical subdivision. Seven characteristic phases in the compositional development of successive palynological assemblages can be recognized: the thiergartii—vicentinense phase (Upper Anisian, Illyrian Substage), the plurianulatus—novimundanus phase and the plurianulatus—secatus phase (Lower Ladinian, approximately Fassanian Substage), the secatus—dimorphus phase and the secatus—vigens phase (Upper Ladinian, approximately Longobardian Substage), the vigens—densus phase (Lower Karnian, Cordevolian Substage), and the densus maljawkinae phase (Middle Karnian, Julian Substage). A palynological concept of the Ladinian and Cordevolian is in reasonable agreement with the classic concepts of the units. Boundaries, however, do not coincide with lithostratigraphical boundaries. It remains difficult to correlate the palynological information with alternative concepts based on ammonoid zonation outside the type-region of the Ladinian. Palynostratigraphically it is unrealistic to consider the Cordevolian to be a synonym of the Julian. The results of quantitative analyses suggest arid climatic conditions. Local humid environments progressively increased during the Ladinian but gradually disappeared during the Cordevolian. These humid environments may explain the occurrence of southern (Gondwana) elements in the assemblages. The following new taxa and new combinations are formally introduced: Bocciaspora nov. gen., Sellaspora nov. gen., Gordonispora nov. gen., Lycopodiacidites kokenii nov. sp., Sellaspora rugoverrucata nov. sp., Sellaspora foveorugulata nov. sp., Krytomisporis ervii nov. sp., Bocciaspora blackstonensis (De Jersey) nov. comb., Gordonispora fossulata (Balme) nov. comb., Gordonispora lubrica (Orlowska-Zwolińska) nov. comb., Weylandites magmus (Bose et Kar) nov. comb., Partitisporites tenebrosus (Scheuring) nov. comb., Partitisporites maljawkinae (Klaus) nov. comb., and Partitisporites quadruplicis (Scheuring) nov. comb. The morphon concept is applied informally to unite morphologically closely related species within the group of the Circumpolles. L'indagine palinostratigrafica del Gruppo di Buchenstein, del Gruppo di Wengen, della Formazione di San Cassiano e del Gruppo di Raibl nelle Dolomiti Occidentali ha portato alla definizione delle caratteristiche palinologiche del Ladinico e del Cordevoliano (sottopiano del Carnico) nella classica area-tipo di queste unità cronostratigrafiche triassiche. Sulla base delle diverse associazioni palinologiche, si possono riconoscere sette fasi caratteristiche: fase thiergartii—vicentinense (Anisico superiore, sottopiano Illirico), fase plurianulatus—novimundanus e fase plurianulatus—secatus (Ladinico Inferiore, approssimativamente sottopiano Fassaniano), fase secatus—dimorphus e fase secatus—vigens (Ladinico superiore, approssimativamente sottopiano Longobardiano), fase vigens—densus (Carnico inferiore, sottopiano Cordevoliano), e fase densus—maljawkinae (Carnico medio, sottopiano Giuliano). La definizione palinologica del Ladinico e del Cordevoliano è ragionevolmente in accordo con i concetti classici di queste unità. I limiti palinologici tuttavia non coincidono con i limiti litostratigrafici. Rimangono delle difficoltà nel correlare i dati palinologici con i diversi dati basati sulle zone ad Ammoniti al di fuori dell'area-tipo del Ladinico. Sulla base dei dati palinologici non è realistico considerare il Cordevoliano come sinonimo del Giuliano. Le analisi quantitative indicano condizioni di clima arido. Locali situazioni di ambienti umidi si sviluppano progressivamente durante il Ladinico, ma regrediscono gradualmente e scompaiono durante il Cordevoliano. Le condizioni locali di ambiente umido potrebbero spiegare la presenza nelle associazioni di elementi meridionali (Gondwana). Sono formalmente descritti i seguenti nuovi taxa e le seguenti nuove combinazioni: Bocciaspora nov. gen., Sellaspora nov. gen., Gordonispora nov. gen., Lycopodiacidites kokenii nov. sp., Sellaspora rugoverrucata nov. sp., Sellaspora foveorugulata nov. sp., Kyrtomisporis ervii nov. sp., Bocciaspora blackstonensis (De Jersey) nov. comb., Gordonispora fossulata (Balme) nov. comb., Gordonispora lubrica (Orłowska-Zwolińska) nov. comb., Weylandites magmus (Bose et Kar) nov. comb., Partitisporites tenebrosus (Scheuring) nov. comb., Partitisporites maljawkinae (Klaus) nov. comb., e Partitisporites quadruplicis (Scheuring) nov. comb. Il concetto di “morfon” è applicato per riunire in modo informale specie morfologicamente molto simili nell'ambito del gruppo dei Circumpolles." @default.
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• W2002074637 date "1983-08-01" @default.
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• W2002074637 title "Aspects of middle and late triassic palynology. 6. Palynological investigations in the Ladinian and lower Karnian of the Western Dolomites, Italy" @default.
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