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Climatic Control of Arenites: an Example from the Carnian (Upper Triassic) of the Dolomites (Northern Italy) R
Geophysical Research Abstracts, Vol. 8, 08628, 2006 SRef-ID: 1607-7962/gra/EGU06-A-08628 © European Geosciences Union 2006 Climatic control of arenites: an example from the Carnian (Upper Triassic) of the Dolomites (northern Italy) R. Meneguolo (1), N. Preto (1), A. Breda (1) (1) Università degli Studi di Padova - Dip.to di Geologia, Paleontologia e Geofisica, Via Giotto, 1. 35137, Padova (Italy) Sedimentology and arenite composition have been investigated in the Upper Triassic of the Dolomites (Southern Alps, northern Italy). The siliciclastics of two superim- posed mixed terrigenous-carbonate, Carnian formations have been studied. The tran- sitional to shallow-marine Heiligkreuz Formation of the Dolomites records at least 8 high-frequency sedimentary cycles. The siliciclastic portions of each cycle are de- posited in a shallow-water subtidal setting, always including high-density flow de- posits in the lower part. Composition of arenites displays a short-term trend from lithic to quartzose. Mixed, high frequency cycles can be recognized also within the continental to transitional Travenanzes Formation. Arenites deposits are found in spo- radic, channelized bodies, and in their related overbank sheets, representing flooding events of ephemeral streams. Fluctuations in the composition of arenites can still be recognized, with a strong quartz enrichment in the upper part of each cycle. Siliciclastic constituents (quartz, feldspars and lithics of volcaniclastic origin) remain constant through time. Volcaniclastic grains may be either substantially unaltered or strongly altered, with altered volcaniclastic grains prevailing in the more quartzose facies. An upwards increase in quartz content is observed also through the whole suc- cession. An influence of tectonics and/or source area changes on the compositional variations of arenites can be excluded. -
Was a Global Carnian Pluvial Event Responsible for the Origin of the Dinosaurs?
Geophysical Research Abstracts Vol. 21, EGU2019-13185, 2019 EGU General Assembly 2019 © Author(s) 2019. CC Attribution 4.0 license. Was a global Carnian Pluvial Event responsible for the origin of the dinosaurs? Randall Irmis (1), Adriana Mancuso (2), Cecilia Benavente (2), Jessica Whiteside (3), and Roland Mundil (4) (1) Natural History Museum of Utah and Department of Geology & Geophysics, University of Utah, Salt Lake City, UT 84108-1214, USA ([email protected]), (2) Instituto Argentino de Nivología Glaciología y Ciencias Ambientales (IANIGLA), CONICET, Mendoza, 5500, Argentina, (3) Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Southampton, SO14 3ZH, United Kingdom, (4) Berkeley Geochronology Center, Berkeley, CA 94709, USA The Late Triassic Period was a pivotal time in Earth history during a hothouse world with high atmospheric CO2, and included the origin of many animal groups that dominated ecosystems for the rest of the Mesozoic. One sud- den climate event during this time that has received renewed attention is the Carnian Pluvial Event (CPE) (or Humid Phase/Wet Intermezzo), which some recent authors suggest was responsible for the origin and early di- versification of dinosaurs. The CPE began during the middle Julian (>231 Ma), and is associated with warming, increased precipitation, perturbation of the carbon cycle, enhanced weathering, and disruption of the carbonate factory. Most of this evidence comes from marine sections in the Tethys region, so the global extent of the CPE is poorly supported. Furthermore, precise and accurate absolute age constraints for key CPE sections are lacking. To help rectify this situation, we present new multiproxy paleoenvironmental evidence from Carnian lacustrine strata in Argentina (∼45◦S paleolatitude) calibrated by a new high-precision U-Pb CA-TIMS zircon age from an interbedded tuff. -
On the Causes of Mass Extinctions
ÔØ ÅÒÙ×Ö ÔØ On the causes of mass extinctions David P.G. Bond, Stephen E. Grasby PII: S0031-0182(16)30691-5 DOI: doi: 10.1016/j.palaeo.2016.11.005 Reference: PALAEO 8040 To appear in: Palaeogeography, Palaeoclimatology, Palaeoecology Received date: 16 August 2016 Revised date: 2 November 2016 Accepted date: 5 November 2016 Please cite this article as: Bond, David P.G., Grasby, Stephen E., On the causes of mass extinctions, Palaeogeography, Palaeoclimatology, Palaeoecology (2016), doi: 10.1016/j.palaeo.2016.11.005 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. ACCEPTED MANUSCRIPT On the causes of mass extinctions David P.G. Bond1* and Stephen E. Grasby2, 3 1School of Environmental Sciences, University of Hull, Hull, HU6 7RX, United Kingdom 2Geological Survey of Canada, 3303 33rd St. N.W. Calgary AB Canada, T2L 2A7. 3Department of Geoscience, University of Calgary, Calgary AB Canada. *Corresponding author. E-mail: [email protected] (D. Bond). ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT ABSTRACT The temporal link between large igneous province (LIP) eruptions and at least half of the major extinctions of the Phanerozoic implies that large scale volcanism is the main driver of mass extinction. -
Avvertenze Relative Alla Redazione Della Tesi Di
UNIVERSITA' DEGLI STUDI DI PADOVA Sede Amministrativa: Università degli Studi di Padova Dipartimento di GEOSCIENZE DOTTORATO DI RICERCA IN : SCIENZE DELLA TERRA CICLO XX TITOLO TESI STRATIGRAPHIC AND COMPOSITIONAL STUDY OF MIXED SHALLOW-WATER CARBONATE-SILICICLASTIC UNITS OF CARNIAN AGE (LATE TRIASSIC) IN DOLOMITES AND JULIAN ALPS (ITALY) STUDIO STRATIGRAFICO E COMPOSIZIONALE DELLE UNITÀ MISTE TERRIGENO- CARBONATICHE, DI BASSA PROFONDITÀ, DEL CARNICO (TRIASSICO SUPERIORE) DI DOLOMITI E ALPI GIULIE Coordinatore : Ch.mo Prof. Gilberto Artioli Supervisore :Ch.mo Prof. Nereo Preto Dottorando : Renata Meneguolo DATA CONSEGNA TESI 31 luglio 2008 AKNOWLEDGEMENTS Dr. Guido Roghi, CNR, Università di Padova, is gratefully appreciated for performing the palynological analyses All my family; and Tom and his family: no need to say why Piero, without you this wouldn’t have been possible!!! Betty and Valentina, the best friend one could desire. Chiara (“fashion stylist”) for her invaluable aesthetic advice KARSTEN for intermediation with Northern Norway (I kept my promise, here you are in capital letters!) Anna because she’s Anna Manuel because he’s Manuel (and for intermediation with Italy) Matteo (“software wizard”) for IT support; Lisa, Marco, Jacopo and the other PhD students from Padua for general support and friendship Stefano, Lorenzo, Nicola, Maui and the lab Stefano Furin, Rachele and other people from Ferrara SH INT GEX ENA LIB people (translated: my colleagues in Stavanger!) for support (and patience!) Donatella (and Adolfo) for precious -
Bituminous Soft Body Tissues in the Body Chamber of the Late Triassic Ceratitid Austrotrachyceras Fkom the Austrian Alps
Mitt. Geo1.-Palaont. Inst. Heft 88 S. 37-50 Hamburg, Oktober 2004 Univ. Hamburg Bituminous soft body tissues in the body chamber of the Late Triassic ceratitid Austrotrachyceras fkom the Austrian Alps LAIUSAA. DOGUZHAEVA,Moskau, HARRYMUTVEI, Stockholm, HERBERT SUMMESBERGER,Wien & ELENADUNCA, Stockholm *) With 5 figures Contents Abstract ............................................................................................................................ 37 Zusamrnenfassung ......................................................................................................... 3 8 I. Introduction .................................................................................................................. 38 11. Material and status of preservation ........................................................................... 39 111. Depositional environment ......................................................................................... 40 W. Methods of study ..................................................................................................... 4 1 V. Observations on the body chamber in Austmtrachyceras ........................................... 43 VI. Discussion ................................................................................................................. 45 Acknowledgements ........................................................................................................ 48 References .................................................................................................................. -
The Middle Triassic Scleractinia-Like Coral Furcophyllia from the Pamir Mountains
The Middle Triassic scleractinia−like coral Furcophyllia from the Pamir Mountains GALINA K. MELNIKOVA and EWA RONIEWICZ Melnikova, G.K. and Roniewicz, E. 2007. The Middle Triassic scleractinia−like coral Furcophyllia from the Pamir Mountains. Acta Palaeontologica Polonica 52 (2): 401–406. Furcophyllia is an unusual coral with septa regularly splitting into branching sets called septal brooms. This pattern of septal apparatus is so alien to scleractinians, that, despite a trabecular microstructure of septa resembling that of the Scleractinia, the genus was originally ascribed to a rare group of corals informally referred to as sleractiniamorphs, previ− ously known from the Ordovician and Permian. Genus Furcophyllia emerged together with corals of several groups, after the post−Permian crisis diversification of skeletonized anthozoans, some of them markedly differing in their skeletal fea− tures from typical Scleractinia. So far, the genus was represented by middle Carnian Furcophyllia septafindens from the Dolomites, in the Southern Alps. Here, we report Furcophyllia shaitanica sp. nov. from limestone boulders found in the volcano−clastic deposits of the upper Ladinian Šajtan suite of the South Eastern Pamirs. A new species of Furcophyllia signifies that the genus was a faunal element widely distributed in the Tethys. Key words: Anthozoa, scleractinia−like corals, Triassic, Pamirs, Alps, Republic of Tajikistan, Italy. Galina K. Melnikova [mgk−[email protected]], Geological Institute, Akademy of Sciences of the Republic of Tajikistan, Aini 267, 734063 Dushanbe, Republic of Tajikistan; Ewa Roniewicz [[email protected]], Institute of Paleobiology, Polish Academy of Sciences, ul. Twarda 51/55, PL−00−818 Warszawa, Poland. Introduction servation of another species, Furcophyllia shaitanica sp. -
Field Trip 2 Late Paleozoic and Mesozoic Terrestrial Environments in the Dolomites and Surrounding Areas 71-116 Geo.Alp, Vol
ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Geo.Alp Jahr/Year: 2016 Band/Volume: 013 Autor(en)/Author(s): Kustatscher Evelyn, Bernardi Massimo, Petti Fabio Massimo, Avanzini Marco, Tomasoni Riccardo Artikel/Article: Field trip 2 Late Paleozoic and Mesozoic terrestrial environments in the Dolomites and surrounding areas 71-116 Geo.Alp, Vol. 13 2016 71 - 116 Field trip 2 Late Paleozoic and Mesozoic terrestrial environments in the Dolomites and surrounding areas Evelyn Kustatscher1,2, Massimo Bernardi3,4, Fabio Massimo Petti3,5, Marco Avanzini3 & Riccardo Tomasoni3 1 Naturmuseum Südtirol, Bindergasse 1, 39100 Bozen/Bolzano, Italy; e-mail: [email protected]; 2 Department für Geo- und Umweltwissenschaften, Paläontologie und Geobiologie, Ludwig-Maximilians- Universität and Bayerische Staatssammlung für Paläontologie und Geologie, Richard-Wagner-Straße 10, 80333 München, Germany; 3 Museo delle Scienze di Trento, Corso del Lavoro e della Scienza 3, 38123 Trento, Italy; e-mail: [email protected], [email protected], [email protected], [email protected]; 4 School of Earth Sciences, University of Bristol, Bristol BS81RJ, UK; 5 PaleoFactory, Dipartimento di Scienze della Terra, Sapienza Università di Roma, P.le Aldo Moro 5, 00185, Roma, Italy. 1 Topics and highlights of the excursion Mojsisovics, 1879, 1882; Mojsisovics et al., 1895; Bittner, 1892; Brack et al., 2005, Mietto & Man- The Southern Alps represent -
Retallack 2011 Lagerstatten
This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier’s archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/copyright Author's personal copy Palaeogeography, Palaeoclimatology, Palaeoecology 307 (2011) 59–74 Contents lists available at ScienceDirect Palaeogeography, Palaeoclimatology, Palaeoecology journal homepage: www.elsevier.com/locate/palaeo Exceptional fossil preservation during CO2 greenhouse crises? Gregory J. Retallack Department of Geological Sciences, University of Oregon, Eugene, Oregon 97403, USA article info abstract Article history: Exceptional fossil preservation may require not only exceptional places, but exceptional times, as demonstrated Received 27 October 2010 here by two distinct types of analysis. First, irregular stratigraphic spacing of horizons yielding articulated Triassic Received in revised form 19 April 2011 fishes and Cambrian trilobites is highly correlated in sequences in different parts of the world, as if there were Accepted 21 April 2011 short temporal intervals of exceptional preservation globally. Second, compilations of ages of well-dated fossil Available online 30 April 2011 localities show spikes of abundance which coincide with stage boundaries, mass extinctions, oceanic anoxic events, carbon isotope anomalies, spikes of high atmospheric carbon dioxide, and transient warm-wet Keywords: Lagerstatten paleoclimates. -
A Late Triassic Major Negative Δ13c Spike Linked to Wrangellia LIP: The
716 Goldschmidt Conference Abstracts A Late Triassic major negative !13C Widespread evidence for spike linked to Wrangellia LIP: heterogeneous accretion of the The Carnian Pluvial Event revealed terrestrial planets and planetisimals J. DAL CORSO1*, P. MIETTO1, R.J. NEWTON2, C.W. DALE1*, K.W. BURTON2, D.G. PEARSON1,3, R.D. PANCOST3, N. PRETO1, G. ROGHI4 AND AND R. GREENWOOD4 2 P.B. WIGNALL 1 Dept. of Earth Sciences, Durham University, DH1 3LE, UK 1Dipartimento di Geoscienze, Università degli Studi di (correspondence: [email protected]) Padova, via Gradenigo 6, 35131, Padova, Italy 2Dept. of Earth Sciences, Oxford University, OX1 3PR, UK (*correspondence: [email protected]). 3Dept. for Earth & Atmos Sci, University of Alberta, 2School of Earth and Environments, University of Leeds, Edmonton, Canada Woodhouse Lane, LS2 1JT, Leeds, UK. 4PSSRI, Open University, Milton Keynes, UK 3Organic Geochemistry Unit, School of Chemistry, University of Bristol, BS8 1TS, Bristol, UK. The abundance and relative proportion of highly 4Istituto di Geoscienze e Georisorse, CNR, via Gradenigo 6, siderophile elements (HSEs) in Earth’s mantle deviate from 35131, Padova, Italy. those predicted by low-pressure equilibrium partitioning between metal and silicate during formation of the core. For During the Carnian (Late Triassic) a major climatic and many elements, high-pressure equilibration in a deep molten biotic change is known, namely the Carnian Pluvial Event silicate layer (or ‘magma ocean’) may account for this (CPE) [1]. This event is characterized by more humid discrepancy [1], but some highly siderophile element conditions testified by hygrophytic palynological assemblages abundances demand the late addition, a ‘late veneer’, of and palaeosols typical of humid climates; the crisis of rimmed extraterrestrial material (i.e. -
Dinosaur Diversification Linked with the Carnian Pluvial Episode
ARTICLE DOI: 10.1038/s41467-018-03996-1 OPEN Dinosaur diversification linked with the Carnian Pluvial Episode Massimo Bernardi 1,2, Piero Gianolla 3, Fabio Massimo Petti 1,4, Paolo Mietto5 & Michael J. Benton 2 Dinosaurs diversified in two steps during the Triassic. They originated about 245 Ma, during the recovery from the Permian-Triassic mass extinction, and then remained insignificant until they exploded in diversity and ecological importance during the Late Triassic. Hitherto, this 1234567890():,; Late Triassic explosion was poorly constrained and poorly dated. Here we provide evidence that it followed the Carnian Pluvial Episode (CPE), dated to 234–232 Ma, a time when climates switched from arid to humid and back to arid again. Our evidence comes from a combined analysis of skeletal evidence and footprint occurrences, and especially from the exquisitely dated ichnofaunas of the Italian Dolomites. These provide evidence of tetrapod faunal compositions through the Carnian and Norian, and show that dinosaur footprints appear exactly at the time of the CPE. We argue then that dinosaurs diversified explosively in the mid Carnian, at a time of major climate and floral change and the extinction of key herbivores, which the dinosaurs opportunistically replaced. 1 MUSE—Museo delle Scienze, Corso del Lavoro e della Scienza 3, 38122 Trento, Italy. 2 School of Earth Sciences, University of Bristol, Bristol BS8 1RJ, UK. 3 Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, via Saragat 1, 44100 Ferrara, Italy. 4 PaleoFactory, Dipartimento di Scienze della Terra, Sapienza Università di Roma, Piazzale Aldo Moro, 5, 00185 Rome, Italy. 5 Dipartimento di Geoscienze, Universitàdegli studi di Padova, via Gradenigo 6, I-35131 Padova, Italy. -
The Carnian Pluvial Episode (Late Triassic): New Insights Into This Important Time of Global Environmental and Biological Change
Downloaded from http://jgs.lyellcollection.org/ by guest on September 28, 2021 Thematic set: The Mid-Carnian Episode Journal of the Geological Society Published Online First https://doi.org/10.1144/jgs2018-185 The Carnian pluvial episode (Late Triassic): new insights into this important time of global environmental and biological change Jacopo Dal Corso1*, Alastair Ruffell2 & Nereo Preto3 1 School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK 2 School of the Natural, Built Environment, Queen’s University, Belfast BT7 1NN, UK 3 Department of Geosciences, University of Padova, via Gradenigo, 6, 35131 Padova, Italy J.D., 0000-0002-2500-4097 * Correspondence: [email protected]; [email protected] Abstract: In May 2017, in the delightful town of Delmenhorst (Lower Saxony, Germany), the first meeting on the Carnian Pluvial Episode (CPE) was hosted by the Hanse-Wissenschaftskolleg, Institute for Advanced Study. This was a milestone event. For the first time researchers from around the world met to discuss this still poorly known episode of early Late Triassic global environmental and biological change. This thematic set originates from discussions at this first meeting, and includes state-of-the-art research on the CPE, with the most recent discoveries on the complex phenomena that happened during this fascinating interval in Earth’s history. Received 10 October 2018; accepted 10 October 2018 The Carnian Pluvial Episode (CPE) is a global climate change that precipitation globally, and at all latitudes? Did the CPE have a occurred in the early Late Triassic, a time of major biological similar impact on all depositional environments and at different turnovers between two of the largest mass extinctions, at the end of latitudes? How do the phases of the CPE differ? What is the exact the Permian and at the end of the Triassic, respectively. -
Triassic–Jurassic Extinction Event
Triassic–Jurassic extinction event The Triassic–Jurassic extinction event marks the boundary between the Triassic and Jurassic % Marine extinction intensity during the Phanerozoic periods, 201.3 million years ago,[1] and is one of the major extinction events of the Phanerozoic P–Tr eon, profoundly affecting life on land and in the oceans. In the seas, a whole class (conodonts)[2] Cap K–Pg and 23–34% of marine genera disappeared.[3][4] O–S Tr–J Late D On land, all archosaurs other than (H) crocodylomorphs (Sphenosuchia and Crocodyliformes) and Avemetatarsalia (pterosaurs and dinosaurs), some remaining therapsids, and many of the large amphibians Millions of years ago became extinct. Statistical analysis of marine losses at this time suggests that the decrease in The blue graph shows the apparent percentage (not the absolute number) of marine animal genera becoming diversity was caused more by a decrease in extinct during any given time interval. It does not [5] speciation than by an increase in extinctions. represent all marine species, just those that are readily fossilized. The labels of the traditional "Big Five" extinction events and the more recently recognised End- Capitanian extinction event are clickable hyperlinks; see Contents Extinction event for more details. (source and image info) Effects Marine invertebrates Marine vertebrates Terrestrial vertebrates Current theories Gradual processes Extraterrestrial impact Volcanic eruptions References Literature External links Effects This event vacated terrestrial ecological niches, allowing the dinosaurs to assume the dominant roles in the Jurassic period. This event happened in less than 10,000 years and occurred just before Pangaea started to break apart.