Rivista Italiana Di Paleontologia E Stratigrafia最新文献

{"title":"LIVELLI CALCAREI CLASTICI DEL MIOCENE SUPERIORE E PLIOCENE NEL SOTTOSUOLO MOLISANO-PUGLIESE","authors":"R. Casnedi, A. Balduzzi","doi":"10.54103/2039-4942/13431","DOIUrl":"https://doi.org/10.54103/2039-4942/13431","url":null,"abstract":"The Molise and Apulia subsurface exploration has found clastic calcareous layers at the top of the Mesozoic—Miocene carbonate sequence and within the Middle Pliocene turbidites. The first are the result of Karst—fissures and crushing on the structural highs and mass flows at the base of fault slopes. Within the turbidites a biocalcarenitic horizon IS an electric good marker which proves an event of a shelf build up. It corresponds to the Middle Pliocene gap widely developed in the Apennines.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141206159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"BENTHIC FORAMINIFERAL BIOCOENOSES IN THE ESTUARINE REGIMES OF GOA","authors":"M. G. A. PADMANABHA SETTY","doi":"10.54103/2039-4942/13433","DOIUrl":"https://doi.org/10.54103/2039-4942/13433","url":null,"abstract":"Benthic Foraminifera are highly responsive to subtle changes in the estuarine environment. Keeping this in view, a qualitative analysis of living benthic Foraminifera was made of the samples collected from the Mandovi—Zuari estuaries and the connecting long and narrow Cumbarjua canal of Goa. The lower reaches of the rivers are paved with a substrate consisting mostly of sand while it is silty—sand in the upper estuarine zones and clayey in the canal zone. The living Foraminifera are abundant in the upper estuarine zones of the rivers and the Cumbarjua canal junction zones, and characterised by the Ammonia—Trochammina suite with Miliammina fusca; while the canal zone is enriched by agglutinated formes. The Ammonia—Elphidium suite dominates the lower estuarine zones indicating a typical marine environment. The high organic matter content particularly in the Canal Zone is due to the inflow of pollutan ts from the nearby pesticide factory and the constant contaminating discharge of navigating barges and other mechanised boats of the fishing industry. Ammonia sp. and its variants and other agglutinated species become dominant here. The decline in calcareous species and thinning of the dead tests leading to their eventual destruction may be attributed to their susceptibility to acidity in the waters.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141206153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FISH OTOLITHS FROM THE LATE MAASTRICHTIAN KEMP CLAY (TEXAS, USA) AND THE EARLY DANIAN CLAYTON FORMATION (ARKANSAS, USA) AND AN ASSESSMENT OF EXTINCTION AND SURVIVAL OF TELEOST LINEAGES ACROSS THE K-PG BOUNDARY BASED ON OTOLITHS","authors":"W. Schwarzhans, Gary L. Stringer","doi":"10.13130/2039-4942/13425","DOIUrl":"https://doi.org/10.13130/2039-4942/13425","url":null,"abstract":"Otolith assemblages have rarely been studied across the K-Pg boundary. The late Maastrichtian Kemp Clay of northeastern Texas and the Fox Hills Formation of North Dakota, and the early Danian Clayton Formation of Arkansas therefore offer new insights into how teleost fishes managed across the K-Pg boundary as reconstructed from their otoliths. The Kemp Clay contains 25 species, with 6 new species and 2 in open nomenclature and the Fox Hills Formation contains 4 species including 1 new species. The two otolith associations constitute the Western Interior Seaway (WIS) community. It contains the earliest unambiguous representatives of the Gadiformes (cods and hakes) and the Heterenchelyidae (mud eels). The WIS community differs significantly from other Maastrichtian otolith assemblages previously studied from Mississippi and Maryland, which constitute the Appalachian community, with only 4 shared species (similarity percentage of 7.3%) between both communities. The difference is interpreted to be related to cold-water influence in the WIS community, which may have still been connected to the Arctic Basin, and to the depostional environment (muddy bottom) in the Kemp Clay. \u0000            The Kemp Clay is unusually rich in taxa that survived the end-Cretaceous extinction event and are still present in the Danian of the Clayton Formation, or, as the case may be, in the Danian and Selandian of the boreal northern European community known from Denmark. Approximately 54% of all otolith-based teleost species identified from the Maastrichtian WIS community survived the K-Pg boundary event (versus 11-12% in other communities) and 73% of the genera (versus 40-50% in other communities). The early Danian Clayton Formation contains an impoverished inherited association with 14 species, of which 11 are survivors from late Maastrichtian times, 1 species is new, and 2 remain in open nomenclature. This compares to a significantly higher degree of newly evolved species in only slightly younger faunas from the middle to late Danian and Selandian of Europe indicating an initially slow pace of recovery. \u0000            The observed differences in survival and the composition of survived and extinct taxa are discussed in the light of the ongoing discussions concerning the consequences and effects that led to the end-Cretaceous extinction event commonly thought to have been caused by a large meteorite impact. In our assessment, an ‘impact winter’ could have had a major influence on the live cycle of tropical to subtropical fishes while perturbations in the pelagic food web or ocean surface acidification might have had a minor and more selective effect. Overall, teleost fishes were significantly affected by the end-Cretaceous mass extinction, but to a much lesser extent than in many other biota. This study provides more evidence of the importance of Late Cretaceous otolith assemblages in the USA for interpreting teleostean evolution. \u0000            The newly described taxa are: E","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47629950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"I CORALLI DEL CALCARE Dl ZU (TRIASSICO SUPERIORE) DELLA LOMBARDIA (ITALIA)","authors":"N. FANTINI SESTINI, E. Motta","doi":"10.54103/2039-4942/13384","DOIUrl":"https://doi.org/10.54103/2039-4942/13384","url":null,"abstract":"The present study deals with a detailed taxonomic study Of the Scleractinia from the middle and upper parts of the Calcare di Zu (Zu Limestone), a formation outcropping in the Central Lombardy and dated as Rhaetian (Late Triassic). \u0000The specimens examined belong to the Collections of the Natural History of the Cities of Bergamo  and Milano. Some specimens deposited at the Museum in Milano belong to the original collection of Stoppani (figured by this author in 1857 to 1865 papers). \u0000According the present revision, the genus Stylophyllopsis Frech, 1890 is a junior synonym of the genus Lepiconus Stoppani, 1857 and Retiophyllia paraclathrata Roniewicz, 1974 is a junior synonym of Retiophyllia langobardica (Stoppani, 1857). The fauna consists of 11 species, belonging to the genera: Cyathocoenia, Astraeomorpha, Pamiroseris, Palaeastraea, Lepiconus, Stylophyllum, Retiophyllia and «Thecosmilia». \u0000Some of the identified species are known only from Stoppani Collection. Someothers, instead, have a larger distribution and are recorded from the northern Side of the Alps, from the Tatra Mountains, Iran, Pamir, and from Northern America.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141209454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TESTIMONIANZE Dl ATTIVITA' TETTONICA TARDOTRIASSICA NELLE PREALPI VICENTINE","authors":"V. DE ZANCHE, P. Mietto","doi":"10.54103/2039-4942/13383","DOIUrl":"https://doi.org/10.54103/2039-4942/13383","url":null,"abstract":"In the Recoaro area (Northern Italy) a channelized breccia containing abundant metamorphic clasts of the crystalline basement is interbedded in the Iower part of the Dolomia Principale formation (Upper Triassic) The breccia is interpreted as a fluvial deposit, which momentarily interrupted the cyclic sedimentation of the Dolomia Principale. This event is connected with a local tectonic phase The instability rnay be related to a more important tectonic activity which involved a region located South of the Recoaro area.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141209478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PRESENZA Dl TREMADOCIANO AD ACRITARCHI IN UNITA' TETTONICHE ERCINICHE A SUD DEL LAGO Dl MULARGIA (SARDEGNA CENTRALE)","authors":"S. Barca, Myriam DEL RIO, N. Minzoni, Paola PITTAU DEMELIA","doi":"10.54103/2039-4942/13382","DOIUrl":"https://doi.org/10.54103/2039-4942/13382","url":null,"abstract":"The activity of the first Hercynian tectonic phase is documented in the Lake Mulargia area (central Sardinia) by the presence of numerous tectonic units. We have examined in particular the southern region of the lake, where one of the upper tectonic units (the Bruncu Maresusus Unit) outcrops. It has at its base a thick silicoclastic succession where we have found Tremadocian Acritarchs in its stratigraphically upper part. This formation is time—equivalent to the Solanas Formation and the Arenarie di San Vito Auct. Another tectonic unit, Bruncu Brevexilis, constitu ted from bottom to top of metavolcanities of probable middle Ordovician age and fossiliferous sediments of Caradocian, Silurian and Devonian age, is also present in the same area and lies under the Bruncu Maresusus Unit.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141209438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In search of the Palaeogene-Neogene Boundary Stratotype","authors":"R. Gelati, F. F. Steininger","doi":"10.54103/2039-4942/13346","DOIUrl":"https://doi.org/10.54103/2039-4942/13346","url":null,"abstract":"In publishing the first results of its research works (Giornale di Geologia, vol. XLIV, fasc. l-Il, 1981 ) the Palaeogene/Neogene Boundary Working Group, while not having defined any final object yet, has nonetheless enabled us to: a) recall attention to the existence of lithofacies (e. g. turbidites, volcanoclastic rocks) of great significance with respect to the geodynamical situation of the Mediterranean; b) to clarify the significance of some first class faunal markers, particularly as regards planktonic foraminfera. \u0000These results permitted to direct the course of subsequent research works carried out by the Group, m the way of giving to the International Commission on Stratigraphy. some objective data for a satisfactory solution of the problem.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141210606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IL ROSSO AMMONITICO INFERIORE (BAIOCIANO - CALLOVIANO) NEI MONTI LESSINI SETTENTRIONALI (VERONA)","authors":"P. Clari, P. Marini, M. Pastorini, G. Pavia","doi":"10.54103/2039-4942/13333","DOIUrl":"https://doi.org/10.54103/2039-4942/13333","url":null,"abstract":"The aim of this paper is the description, from both the biostratigraphical and sedimen• tological point of view, Of the lower member of the Rosso Ammonitico Veronese, one of the most known red, nodular, pelagic limestones of the mediterranean Jurassic. \u0000The R.A.V. is a condensed sequence Of red, mostly nodular, limestones, Often rich in internal molds Of ammonites, which is areally restricted to the \"Trento Ridge\", a structural high isolated in the early Jurassic by the rifting Of a Triassic, large epicontinental carbonate—platform. It spans in age from late Bajocian to Tithonian and is separated from the underlying shallow—water carbonates Of Liassic and Aalenian age by a sharp break in sedimentation, underlined by a mineralized hard ground, which lasted for all early and middle Bajocian. \u0000Two members may bc recognized in the R.A.V.: a lower (Rosso Ammonitico Inferiore) and an upper one (Rosso Ammonitico Superiore) separated by a stratigraphic gap. The lower member, ranging in age from late Bajocian to middle Callovian, is well developed only in the southern part of the 'Trento Ridge\" (i. e. in the Lessini Veronesi area) and has a variable thickness which reaches a maximum of 8 meters.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141211573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CATALOGO DEGLI OLOTIPI DEPOSITATI PRESSO IL MUSEO Dl PALEONTOLOGIA Dipartimento di Scienze della Terra Università degli Studi di Milano","authors":"L. RINETTI SCHIROLI","doi":"10.54103/2039-4942/13336","DOIUrl":"https://doi.org/10.54103/2039-4942/13336","url":null,"abstract":"\u0000 \u0000 \u0000  \u0000 \u0000 \u0000  \u0000  \u0000 \u0000 \u0000 \u0000Viene dato l'elenco degli \"Olotipi\" fino ad ora presenti nelle collezioni del Museo di Paleontologia — Dipartimento di Scienze della Terra — Universita degli Studi di Milano. \u0000Nel catalogo per ogni entità tassonomica sono indicati:  nome del genere secondo la designazione originale  nome della specie  nome dell'autore della specie  data di pubblicazione  citazione bibliografica completa del lavoro con riferimento alla descrizione e all'illustrazione originale dell'olotipo  eta  ubicazione geografica precisa  numero d'inventario ed indicazione della collezione originale.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141211547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"L'UNITA Dl BORGHETTO ED 1 SUOI LEGAMI CON QUELLA Dl MOGLIO—TESTICO (ALPI LIGURI): CONSEGUENZE PALEOGEOGRAFICHE","authors":"B. Galbiati","doi":"10.54103/2039-4942/13329","DOIUrl":"https://doi.org/10.54103/2039-4942/13329","url":null,"abstract":"The reasons for an early Cenozoic age of the basal part of the Borghetto succession, as an alternative to an upper Cretaceous age, are re—proposed. \u0000Moglio Pelites have been found at the stratigraphic base of the \"prepiemontese\" succession of Borghetto. This proves that the paleogeographical location of the above succession had to be contiguous with the one of the Moglio—Testico unit, which was therefore interposed between the Borghetto deposition area and the San Remo one. \u0000The olistostromes of Moglio Pelites retraceable inside and at the top of the mentioned Borghetto succession show that in the domains, which the western Liguria flysch come from, the tectogenesis started before the San Remo—M. Saccarello unit had been overthrust towards the external Brianzonese.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141211855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}