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dc.contributor.authorallTremolada, F.; RPS Energyen
dc.contributor.authorallGuasti, E.; NTOen
dc.contributor.authorallScardia, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italiaen
dc.contributor.authorallCarcano, C.; Burren Resources Petroleumen
dc.contributor.authorallRogledi, ENI E&Pen
dc.contributor.authorallSciunnach, D.; Regione Lombardiaen
dc.description.abstractCalcareous nannofossil and foraminiferal analyses have been carried out on outcrops from the type-area of the Gonfolite Lombarda Group (Como, northern Italy). In these marine fine- to coarse-grained clastics, rapidly accumulating at the southern front of the uprising Alpine range during the Oligo-Miocene, a scarce, but reliable, sequence of calcareous nannofossil events has been observed, allowing to refine the previous age assignments. Planktonic foraminifera were found to be extremely rare and provided limited biostratigraphic information. The Villa Olmo Conglomerate and the Chiasso Formation contain the Last Occurrence (LO) of Sphenolithus distentus and the First Occurrence (FO) of Triquetrorhabdulus carinatus, which are characteristic of the nannofossil zones NP24 and NP25 (Chattian), respectively. The lower part of the Como Conglomerate was deposited during the zone NP25, whilst the upper part of the Como Conglomerate straddles the Chattian/Aquitanian boundary in zone NN1. The deposition of the Prestino Mudstones also occurred during zone NN1. However, the upper part of this formation has been dated as Burdigalian during nannofossil zone NN2. The deposition of the upper part of the Val Grande Sandstone has been assigned to the NN3 zone owing to the presence of the taxon Sphenolithus belemnos, which is restricted to NN3. The upper part of the investigated section is characterized by the deposition of the Lucino Conglomerate and its fine-grained members (Lucinasco and Lurate Caccivio Mudstones). The Lucinasco Mudstones have been dated as late Burdigalian corresponding to zone NN4, whilst the overlying Lurate Caccivio Mudstones were deposited during the Langhian part of the zone NN5, based on the presence of S. heteromorphus and the absence of H. ampliaperta. On the whole, the base and the top of the outcropping Gonfolite Lombarda Group result from our study to be younger than hitherto proposed, allowing to resolve certain previous conflicts with the few radiometric dates available for clasts from the Gonfolite Lombarda Group. The depth of deposition was upper bathyal during the Chattian and the Aquitanian and shallowed to neritic during the deposition of the Langhian Lurate Caccivio Mudstones.en
dc.publisher.nameDipartimento di Scienze della Terra "A. Desio" - Università di Milanoen
dc.relation.ispartofRivista Italiana di Paleontologia e Stratigrafiaen
dc.subjectGonfolite Lombarda Groupen
dc.subjectcalcareous nannofossilsen
dc.subjectSouthern Alpsen
dc.titleReassessing the biostratigraphy and the paleobathymetry of the Gonfolite Lombarda Group in the Como area (northern Italy)en
dc.description.statusIn pressen
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.02. Geochronologyen
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.04. Marine geologyen
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.08. Sediments: dating, processes, transporten
dc.subject.INGV04. Solid Earth::04.04. Geology::04.04.10. Stratigraphyen
dc.subject.INGV04. Solid Earth::04.07. Tectonophysics::04.07.07. Tectonicsen
dc.description.obiettivoSpecifico3.2. Tettonica attivaen
dc.description.journalTypeJCR Journalen
dc.contributor.authorTremolada, F.en
dc.contributor.authorGuasti, E.en
dc.contributor.authorScardia, G.en
dc.contributor.authorCarcano, C.en
dc.contributor.authorRogledi, ENI E&Pen
dc.contributor.authorSciunnach, D.en
dc.contributor.departmentRPS Energyen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italiaen
dc.contributor.departmentBurren Resources Petroleumen
dc.contributor.departmentRegione Lombardiaen
item.fulltextWith Fulltext-
item.cerifentitytypePublications- Nazionale di Geofisica e Vulcanologia (INGV), Sezione Milano, Milano, Italia- Oceanográfico, Universidade de São Paulo, São Paulo, Brazil- Resources Petroleum- Exploration and Production, San Donato Milanese (Milan), Italy- Lombardia- Nazionale di Geofisica e Vulcanologia-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
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