DOCSLIB.ORG

Sial Et Al..Fm

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Sial Et Al..Fm International Geology Review, Vol. 43, 2001, p. XXX–XXX. Copyright © 2001 by V. H. Winston & Son, Inc. All rights reserved. Carbon and Oxygen Isotope Compositions of Some Upper Cretaceous–Paleocene Sequences in Argentina and Chile A. N. SIAL,1 V. P. F ERREIRA, Department of Geology, NEG-LABISE, UFPE, P.O. Box 7852, Recife, PE, Brazil, 50732-970 A. J. TOSELLI, INSUGEO, National University of Tucuman, S.M. Tucuman, Argentina 4000 M. A. PARADA, Department of Geology, University of Chile, P.O. Box 13518, Santiago, Chile F. G. A CENOLAZA, INSUGEO, National University of Tucuman, S.M. Tucuman, Argentina 4000 M. M. PIMENTEL, Geosciences Institute, University of Brasilia, Brasilia, D.F., Brazil 70.910-970 AND R. N. ALONSO Department of Geology, National University of Salta, P.O. Box 362, Salta, Argentina, 4400 Abstract The Cretaceous–Paleocene (K–T) transition has been recorded in sedimentary carbonate rocks in northwestern Argentina and southern Chile. In the Yacoraite Basin, Argentina, this transition has been preserved in a 2 m thick marly layer, at the base of the Tunal Formation, which overlies lacus- trine/marine carbonates of the Yacoraite Formation (Cabra Corral dam). The K–T transition is also preserved at Maimara, where Tertiary sandstones overlie a 50 m thick limestone bed of the Yacoraite Formation. In the Magellan Basin, Chile, glauconitic sandstones with calcitic cement and limestone concretions of the Maastrichtian Punta Rocallosa Formation are overlain by sandstones, claystones, and limestones of the Chorillo Chico Formation. The K–T transition is preserved in the lower portion of the Chorillo Chico Formation. δ13 Carbonates of the Yacoraite Formation display bulk-rock C values from +1 to +2‰ PDB, with δ13 a negative incursion (–4‰ PDB) at the K–T transition. C values in the Tunal Formation marls vary δ13 from –3 to –1‰ PDB. At Rocallosa Point, C values in limestone strata, calcite cement, and lime- stone concretions vary from –4 to –33 ‰ PDB, and the lowest value in the Chorillo Chico Formation apparently marks the K–T transition. The δ18O fluctuations in the Yacoraite and Magellan carbonate rocks suggest a temperature drop at the K–T transition, followed by a temperature rise. High 87Sr/86Sr ratios (0.7140–0.7156) characterize the studied profiles of the Yacoraite Forma- tion, documenting an important 87Sr-enriched source of Sr to the water from which these carbonates precipitated. At the Magellan basin, 87Sr/86Sr ratios are closer to the expected values for the global Late Cretaceous–Paleocene ocean. Introduction the result of a meteoric impact, the consequence of which was the generation of a sun-blocking dust SEVERAL STUDIES HAVE FOCUSED on the Late Creta- cloud, cessation of photosynthesis, and disruption ceous-Paleocene (K–T) transition, a time of very of the food chain, causing prolonged ecological important worldwide massive faunal extinction. modification. Among the several hypotheses proposed, the one by In many basins where the K–T transition has Alvarez et al. (1980) advocates faunal extinction as been investigated using C and O isotopes, important environmental changes have been detected (e.g., 1Corresponding author; e-mail: [email protected]. Magaritz, 1989; Ferreira et al., 1994). Only in few 0020-6814/01/XXX/XXX-19 $10.00 1 2 SIAL ET AL. FIG. 1. Location of the five K–T transition sites examined in this study in Argentina and Chile. Location of the Pernambuco-Paraíba Coastal Basin is also indicated. places in continental South America, however, has Paraiba Coastal Basin (Albertão and Kotsoukos, this transition been demonstrated by stable-isotope 1994; Albertão et al., 1994; Ferreira et al., 1994). studies of carbonate rocks. C and O isotopes are Albertão and Kotsoukos (1994) described a sedi- important sensors for climatic changes, and such mentary section at the Poty quarry, in the Pernam- investigations should contribute to a better under- buco-Paraíba Coastal Basin, where a 1 cm thick standing of this transition in the Southern Hemi- clay layer between the Gramame and Maria Farinha sphere. Suitable targets for study include limestones exhibits distinctive features similar to sedimentary carbonate rocks of the Pernambuco- clays found at the K–T transition globally, such as Paraíba Coastal Basin, northeastern Brazil, the Yac- mass extinction, iridium and total organic C anoma- oraite and Neuquen basins, respectively in north- lies, deviations in the patterns of C and O isotopes, western and west-central Argentina, and the and exotic elements (shocked quartz grains and Navidad (Topocalma Point) and Magellan (Punta microspherules). This is, perhaps, the only locality Arenas) basins of Chile (Fig. 1). The Late Creta- in Brazil that contains the K–T transition, according ceous–Paleocene transition also has been recorded to Albertão and Kotsoukos (1994). Ferreira et al. in the Antarctic Peninsula (Souza et al., 1994), (1996) observed a sharp decrease in δ13C values based on sedimentological, biostratigraphic, and from +2‰ PDB to –5.5‰ PDB in the transition petrologic indicators, as well as O isotopes of calcite from the Gramame to the Maria Farinha limestone, cement and organic indicators (biomarkers and with a corresponding increase in δ18O from –6‰ vitrinite). PDB to –1‰ PDB that suggests a significant tem- C and O isotope data for carbonates from the K– perature drop at the transition, as typically observed T transition are available for the Pernambuco- worldwide (e.g., Magaritz, 1989). UPPER CRETACEOUS–PALEOCENE SEQUENCES 3 An important climatic change during the K–T According to Palma (1984), the Yacoraite Forma- transition was recognized by Ashrof and Stinnes- tion exhibits high-energy water facies (terrigeneous beck (1989) on the basis of the fossil record of the and intraclastic carbonate rocks) and quiet-water Gramame and Maria Farinha limestones. The cli- facies (claystones, mudstones, and wackestones). mate during the deposition of the Maastrichtian Gra- Carbonates include limestones, slightly magnesian mame limestone was tropical to subtropical and to dolomitic limestones, calcitic dolomites, and changed into subtropical to temperate during the dolomites. The fossil record encompasses gastro- deposition of the Paleocene Maria Farinha lime- pods, ostracods, pelecypods, and reptiles, as well as stone. wood fragments, karophytas, and stromatolites that Oxygen isotopes studies (Hsu and Wissert, 1980) indicate lacustrine sedimentation. Lack of strati- suggest that during the Late Maastrichtian, temper- graphic discontinuity between the Maastrichtian Yacoraite Formation and the Paleocene Olmedo atures in the South Atlantic Ocean were in the 18– Formation, led Palma (1984) to assume that 25°C range, with a cooling immediately before the the K–T transition was preserved in the Olmedo K–T transition. A gradual temperature decrease to Formation. values as low as 10°C during the Late Maastrichtian was observed by Huber et al. (1995) studying oxy- The deposition of the Salta Group during the gen isotopes in planktonic foraminifera from the Neocomian to Campanian was controlled by a rift environment, but there is no unique interpretation Deep Sea Drilling Project (DSDP) in the southern for the depositional environment of the Yacoraite Atlantic Ocean. sediments. Marquillas et al. (1999) proposed that In this study, we examine the behavior of C, O, the post-rift environment was marked by a deep and Sr isotopes and bulk chemistry (Si, Mg/Ca, Sr, Maastrichtian marine ingression that marked the Fe, and Mn) of sedimentary carbonates from the termination of an arid environment and led to a Yacoraite Formation (Maimara and Cabra Corral, carbonate system that persisted until the early northwestern Argentina), the Topocalma Formation Paleocene. (Topocalma Point and the village of Algarrobo), Dar- A lacustrine depositional environment for the win’s Navidad Basin (170 km southwest of Santi- Yacoraite Formation sediments was recognized by ago), and Magellanes Province in Chilean Patagonia Palma (1984) on the basis of observed dinosaur to evaluate evidence of a possible K–T transition. tracks and plant remains. Marquillas et al. (1999) The new isotopic data will contribute to the knowl- assumed that the Lower Cretaceous lacustrine depo- edge of the geochemistry of the global ocean during sitional environment graded into a marine one dur- the K–T transition event. ing the Maastrichtian, or a fluvial environment with saline mud flats with clastic and carbonate lacus- Geological Setting trine systems until the middle Eocene. Presence of some foraminifera and fish species in the Yacoraite K–T transition in northwestern Argentina Formation implies a marine influence. This is a plausible hypothesis regarding sea level rise during The K–T transition has been preserved in the the Late Cretaceous, and would imply that marine transition of the Maastrichtian Yacoraite Formation faunal elements could have undergone adaptation to to the Paleocene Olmedo Formation (Salta Group), continental conditions (Palma, 1984). Ammonites in northwestern Argentina. This group has an evolu- are found in Bolivia, demonstrating the existence of tionary history from Early Cretaceous to Middle an open sea up to that extension of the basin, and Paleocene and occupies a variety of sedimentary that, to the south, there was a connection with the environments with a cumulative thickness of depos- Atlantic Ocean, reflecting the fact that some units its of ~5,000 m (Salfity and Marquillas, 1994). The contain foraminifera. Yacoraite Formation lime- Salta Group is subdivided into the Balbuena (older) stones in some localities in Argentina contain and the Santa Barbara (younger) subgroups. The marine fish fossils (some were flying fish; e.g., Gas- Yacoraite Formation overlies the Lecho Formation teroclupea branisai at Tres Cruces) and, in Bolivia, and forms a part of the Balbuena Subgroup, and is these fossils were found together with ammonites. overlain by the Tunal Formation (same as the Near the top of the Yacoraite Formation in the sec- Olmedo Formation; Fig. 2) of the Santa Barbara tion at Tonco Valley (dinosaur track locality), a few Subgroup.
Load more

Recommended publications
  • Late Mesozoic to Paleogene Stratigraphy of the Salar De Atacama Basin, Antofagasta, Northern Chile: Implications for the Tectonic Evolution of the Central Andes
    Late Mesozoic to Paleogene stratigraphy of the Salar de Atacama Basin, Antofagasta, Northern Chile: Implications for the tectonic evolution of the Central Andes Constantino Mpodozisa,T,Ce´sar Arriagadab, Matilde Bassoc, Pierrick Roperchd, Peter Cobbolde, Martin Reichf aServicio Nacional de Geologı´a y Minerı´a, now at Sipetrol. SA, Santiago, Chile bDepartamento de Geologı´a, Universidad de Chile, Santiago, Chile cServicio Nacional de Geologı´a y Minerı´a, Santiago, Chile dIRD/Dep. de Geologı´a, Universidad de Chile, Santiago, Chile eGe´osciences-Rennes (UMR6118 du CNRS), France fDepartment of Geological Sciences University of Michigan, United States Abstract The Salar de Atacama basin, the largest bpre-AndeanQ basin in Northern Chile, was formed in the early Late Cretaceous as a consequence of the tectonic closure and inversion of the Jurassic–Early Cretaceous Tarapaca´ back arc basin. Inversion led to uplift of the Cordillera de Domeyko (CD), a thick-skinned basement range bounded by a system of reverse faults and blind thrusts with alternating vergence along strike. The almost 6000-m-thick, upper Cretaceous to lower Paleocene sequences (Purilactis Group) infilling the Salar de Atacama basin reflects rapid local subsidence to the east of the CD. Its oldest outcropping unit (Tonel Formation) comprises more than 1000 m of continental red sandstones and evaporites, which began to accumulate as syntectonic growth strata during the initial stages of CD uplift. Tonel strata are capped by almost 3000 m of sandstones and conglomerates of western provenance, representing the sedimentary response to renewed pulses of tectonic shortening, which were deposited in alluvial fan, fluvial and eolian settings together with minor lacustrine mudstone (Purilactis Formation).
    [Show full text]
  • Appendix A. Supplementary Material
    Appendix A. Supplementary material Comprehensive taxon sampling and vetted fossils help clarify the time tree of shorebirds (Aves, Charadriiformes) David Cernˇ y´ 1,* & Rossy Natale2 1Department of the Geophysical Sciences, University of Chicago, Chicago 60637, USA 2Department of Organismal Biology & Anatomy, University of Chicago, Chicago 60637, USA *Corresponding Author. Email: [email protected] Contents 1 Fossil Calibrations 2 1.1 Calibrations used . .2 1.2 Rejected calibrations . 22 2 Outgroup sequences 30 2.1 Neornithine outgroups . 33 2.2 Non-neornithine outgroups . 39 3 Supplementary Methods 72 4 Supplementary Figures and Tables 74 5 Image Credits 91 References 99 1 1 Fossil Calibrations 1.1 Calibrations used Calibration 1 Node calibrated. MRCA of Uria aalge and Uria lomvia. Fossil taxon. Uria lomvia (Linnaeus, 1758). Specimen. CASG 71892 (referred specimen; Olson, 2013), California Academy of Sciences, San Francisco, CA, USA. Lower bound. 2.58 Ma. Phylogenetic justification. As in Smith (2015). Age justification. The status of CASG 71892 as the oldest known record of either of the two spp. of Uria was recently confirmed by the review of Watanabe et al. (2016). The younger of the two marine transgressions at the Tolstoi Point corresponds to the Bigbendian transgression (Olson, 2013), which contains the Gauss-Matuyama magnetostratigraphic boundary (Kaufman and Brigham-Grette, 1993). Attempts to date this reversal have been recently reviewed by Ohno et al. (2012); Singer (2014), and Head (2019). In particular, Deino et al. (2006) were able to tightly bracket the age of the reversal using high-precision 40Ar/39Ar dating of two tuffs in normally and reversely magnetized lacustrine sediments from Kenya, obtaining a value of 2.589 ± 0.003 Ma.
    [Show full text]
  • Titanosaur Trackways from the Late Cretaceous El Molino Formation of Bolivia (Cal Orck’O, Sucre)
    Annales Societatis Geologorum Poloniae (2018), vol. 88: 223 – 241. doi: https://doi.org/10.14241/asgp.2018.014 TITANOSAUR TRACKWAYS FROM THE LATE CRETACEOUS EL MOLINO FORMATION OF BOLIVIA (CAL ORCK’O, SUCRE) Christian A. MEYER1, Daniel MARTY2 & Matteo BELVEDERE3 1 Department of Environmental Sciences, University of Basel, Bernoullistrasse 32, CH-4056 Basel, Switzerland; e-mail: [email protected] 2 Museum of Natural History Basel, Augustinergasse 2, CH- 4000 Basel, Switzerland; e-mail: [email protected] 3 Office de la culture, Paléontologie A16, Hôtel des Halles, P.O. Box 64, CH-2900 Porrentruy 2, Switzerland; e-mail: [email protected] Meyer, C. A., Marty, D. & Belvedere, M., 2018. Titanosaur trackways from the Late Cretaceous El Mo- lino Formation of Bolivia (Cal Orck’o, Sucre). Annales Societatis Geologorum Poloniae, 88: 223 – 241. Abstract: The Cal Orck’o tracksite is exposed in a quarry wall, approximately 4.4 km NW of Sucre (Department Chuquisaca, Bolivia) in the Altiplano/Cordillera Oriental, in the El Molino Formation (Middle Maastrichtian). Fossiliferous oolitic limestones, associated with large, freshwater stromatolites and nine levels of dinosaur tracks in the El Molino Formation document an open lacustrine environment. The main track-bearing level is almost vertical with a surface area of ~ 65,000 m2. The high-resolution mapping of the site from 1998 to 2015 revealed a total of 12,092 individual dinosaur tracks in 465 trackways. Nine different morphotypes of dinosaur tracks have been documented. Amongst them are several trackways of theropods, orni- thopods, ankylosaurs and sauropods, with the latter group accounting for 26% of the trackways.
    [Show full text]
  • 3.Nishida Riesco.Pmd
    11 PRELIMINARY REPORT ON PERMINERALIZED PLANT REMAINS POSSIBLY FROM THE PALEOCENE CHORRILLO CHICO FORMATION, MAGALLANES REGION, CHILE Harufumi Nishida1, Kazuhiko Uemura2, Kazuo Terada3, Toshihiro Yamada2, Miguel Rancusi Herrera4, and Luis Felipe Hinojosa5 1Faculty of Science and Engineering, Chuo University, Bunkyo, Tokyo 112-8551, Japan E-mail: [email protected] 2National Science Museum, Tokyo 169-0073, Japan 3Fukui Prefectural Dinosaur Museum, Fukui 911-8601, Japan 4Colegio Compania de Maria, Santiago, Chile 5Facultad de Ciencias, Universidad de Chile, Santiago, Chile Introduction New assemblages of well-preserved permineralized plant fossils were found in southern Patagonia on the southern shore of Riesco Island (Isla Riesco), northwest of Punta Arenas, in the Magallanes (XII) Region of Chile (Figs. 1, 2A, B). The fragments of plant organs and tissues in various sizes and degrees of preservation are present in calcium-carbonate concretions collected at the mouth of the Rio Boer river near Punta Sunshine (53°01.8’S, 71°55.6’W). The concretions are marine in origin, containing molluskcs that may help age determination and biostratigraphic correlation of their source beds. Thick Upper Cretaceous to Tertiary sediments with a NW-SE trend dipping NE are well exposed at Riesco Island. The concretions are probably derived from sediments in the Palaeocene Chorrillo Chico Formation exposed along the Rio Boer running south into the Otway Sound (Seno Otway), because no other formation is distributed in the river drainage area (Mapa geologico de Chile, Escala 1: 1,000,000, 2002). This assignation is further supported by evidence that the Chorrillo Chico Formation is characterized by lithofacies containing calcareous concretions reported by Charrier and Lahsen (1969).
    [Show full text]
  • Analysis of Titanopodus Tracks from the Late Cretaceous of Mendoza, Argentina
    “main” — 2011/1/12 — 13:08 — page 1 — #1 Anais da Academia Brasileira de Ciências (Annals of the Brazilian Academy of Sciences) Printed version ISSN 0001-3765 / Online version ISSN 1678-2690 www.scielo.br/aabc Speeds and stance of titanosaur sauropods: analysis of Titanopodus tracks from the Late Cretaceous of Mendoza, Argentina BERNARDO J. GONZÁLEZ RIGA Departamento de Paleontología, IANIGLA, CCT-CONICET-Mendoza, Avda. Ruiz Leal s/n, Parque Gral. San Martín (5500) Mendoza, Argentina/Instituto de Ciencias Básicas, Universidad Nacional de Cuyo Manuscript received on November 13, 2009; accepted for publication on June 21, 2010 ABSTRACT Speed estimations from trackways of Titanopodus mendozensis González Riga and Calvo provide information about the locomotion of titanosaurian sauropods that lived in South America during the Late Cretaceous. Titanopodus ichnites were found at Agua del Choique, a newly discovered track site in the Loncoche Formation, Late Campanian-Early Maastrichtian of Mendoza, Argentina. This speed study follows the hypothesis of dynamic similarity proposed by Alexander. As a refinement of this method, a complementary equation is presented here based on an articulated titanosaurian specimen collected in strata that are regarded as correlative to those that have yielded Titanopodus tracks (Allen Formation, Neuquén Basin). This analysis indicates that hip height can be estimated as 4.586 times the length of the pes track in derived titanosaurs. With an estimation of the hip height and the stride measurements, the speed is calculated. The study of two wide-gauge trackways indicates that Titanopodus ichnites were produced by medium- sized titanosaurs (hip height of 211-229 cm) that walked at 4.7-4.9 km/h towards the south and southwest, following, in part, a sinuous pathway.
    [Show full text]
  • O Regist Regi Tro Fós Esta Istro De Sil De C Ado Da a E
    UNIVERSIDADE FEDERAL DO RIO GRANDE DOO SUL INSTITUTO DE GEOCIÊNCIAS PROGRAMA DE PÓS-GRADUAÇÃO EM GEOCIÊNCIAS O REGISTRO FÓSSIL DE CROCODILIANOS NA AMÉRICA DO SUL: ESTADO DA ARTE, ANÁLISE CRÍTICAA E REGISTRO DE NOVOS MATERIAIS PARA O CENOZOICO DANIEL COSTA FORTIER Porto Alegre – 2011 UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL INSTITUTO DE GEOCIÊNCIAS PROGRAMA DE PÓS-GRADUAÇÃO EM GEOCIÊNCIAS O REGISTRO FÓSSIL DE CROCODILIANOS NA AMÉRICA DO SUL: ESTADO DA ARTE, ANÁLISE CRÍTICA E REGISTRO DE NOVOS MATERIAIS PARA O CENOZOICO DANIEL COSTA FORTIER Orientador: Dr. Cesar Leandro Schultz BANCA EXAMINADORA Profa. Dra. Annie Schmalz Hsiou – Departamento de Biologia, FFCLRP, USP Prof. Dr. Douglas Riff Gonçalves – Instituto de Biologia, UFU Profa. Dra. Marina Benton Soares – Depto. de Paleontologia e Estratigrafia, UFRGS Tese de Doutorado apresentada ao Programa de Pós-Graduação em Geociências como requisito parcial para a obtenção do Título de Doutor em Ciências. Porto Alegre – 2011 Fortier, Daniel Costa O Registro Fóssil de Crocodilianos na América Do Sul: Estado da Arte, Análise Crítica e Registro de Novos Materiais para o Cenozoico. / Daniel Costa Fortier. - Porto Alegre: IGEO/UFRGS, 2011. [360 f.] il. Tese (doutorado). - Universidade Federal do Rio Grande do Sul. Instituto de Geociências. Programa de Pós-Graduação em Geociências. Porto Alegre, RS - BR, 2011. 1. Crocodilianos. 2. Fósseis. 3. Cenozoico. 4. América do Sul. 5. Brasil. 6. Venezuela. I. Título. _____________________________ Catalogação na Publicação Biblioteca Geociências - UFRGS Luciane Scoto da Silva CRB 10/1833 ii Dedico este trabalho aos meus pais, André e Susana, aos meus irmãos, Cláudio, Diana e Sérgio, aos meus sobrinhos, Caio, Júlia, Letícia e e Luíza, à minha esposa Ana Emília, e aos crocodilianos, fósseis ou viventes, que tanto me fascinam.
    [Show full text]
  • Expedition in the Remote
    Fitz Roy expedition © 2010 Luis Bertea R. EXCLUSIVE EXPLORATION CRUISE, ESPECIALLY DEDICATED TO PHOTOGRAPHY AND WILDLIFE OBSERVATION IN THE REMOTE REGION OF TIERRA DEL FUEGO AND THE MAGELLAN STRAIT 2 www.expedicionfitzroy.com Cruceros de Expedición 3 Hyatt sound © 2010 Luis Bertea R. 4 www.expedicionfitzroy.com Dear friends... We’d like to invite you to join us on this exclusive Nature Expedition aboard the M/N Forrest, sailing through the fjords of Patagonia and visiting Francisco Coloane Marine Park in the Magellan Strait. This expedition, guided by photographers and nature experts, is designed for all those who have a love for photography and nature. We are committed to making your experience in Patagonia unique, an opportunity to explore pristine landscapes visited by very few. We look forward to having you with this adventure! Fitz Roy Expedition Cruceros de Expedición 5 © 2010 Luis Bertea R. 6 www.expedicionfitzroy.com Two companies, one concept Patagonia Photosafaris has formed an This alliance has allowed us to create an alliance with Expedición Fitz Roy, to offer exploration cruise in which we’ll embark on expedition cruises through the Magellan a search for the most fascinating nature Strait and Tierra del Fuego aboard the spots Patagonia has to offer. M/N Forrest, a tourism vessel especially equipped for sailing in this area. Join us on one of our adventure cruises and discover with us this wild geography This motorship was conceived as much in its purest state, just as it was 500 years more than just a vessel to carry out ago when Ferdinand Magellan became the regular itinerary daytrips to the spectacular first European to explore it.
    [Show full text]
  • Evaluating the Role of Tectonics, Eustasy, and Climate On
    This manuscript is a preprint and has been submitted to Basin Research for peer review. Please note that, this manuscript has to be formally accepted for publication. Subsequent versions may have slight differences in content according to the peer review process. If accepted, the final version of this manuscript will be available via the ‘Peer-reviewed Publication DOI’ link on the right information panel of this website. We welcome feedback on the content of this manuscript. Please feel free to contact any of the authors. EVALUATING THE ROLE OF TECTONICS, EUSTASY, AND CLIMATE ON THE MAASTRICHTIAN-DANIAN TRANSGRESSION IN THE MAGALLANES- AUSTRAL BASIN (CHILEAN PATAGONIA) Huber A. Rivera1, 2, *, Jacobus P. Le Roux1, Marcelo Farías1, Néstor M. Gutiérrez1, Alejandro Sánchez3, Sylvia Palma-Heldt4, Lissett Celle1 1Departamento de Geología, FCFM, Universidad de Chile, Plaza Ercilla 803, Santiago, Chile 2Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France 3Departamento de Ingeniería en Minas, Universidad de Santiago de Chile, Av. O'Higgins 3363, Estación Central, Santiago, Chile 4Departamento de Ciencias de la Tierra, Universidad de Concepción, Barrio Universitario S/N°, Concepción, Chile *Corresponding author: [email protected]; [email protected] Page 1 of 65 Basin Research 1 2 3 Evaluating the role of tectonics, eustasy, and climate on the Maastrichtian-Danian 4 5 6 transgression in the Magallanes-Austral Basin (Chilean Patagonia) 7 8 9 Huber A. Rivera1, 2, *, Jacobus P. Le Roux1, Marcelo Farías1, Néstor M. Gutiérrez1, 10 3 4 1 11 Alejandro Sánchez , Sylvia Palma-Heldt , Lissett Celle 12 13 1Departamento de Geología, FCFM, Universidad de Chile, Plaza Ercilla 803, Santiago, Chile 14 15 2Univ.
    [Show full text]
  • Speeds and Stance of Titanosaur Sauropods: Analysis of Titanopodus Tracks from the Late Cretaceous of Mendoza, Argentina
    “main” — 2011/2/10 — 16:13 — page 279 — #1 Anais da Academia Brasileira de Ciências (2011) 83(1): 279-290 (Annals of the Brazilian Academy of Sciences) Printed version ISSN 0001-3765 / Online version ISSN 1678-2690 www.scielo.br/aabc Speeds and stance of titanosaur sauropods: analysis of Titanopodus tracks from the Late Cretaceous of Mendoza, Argentina BERNARDO J. GONZÁLEZ RIGA Departamento de Paleontología, IANIGLA, CCT-CONICET-Mendoza, Avda. Ruiz Leal s/n, Parque Gral. San Martín (5500) Mendoza, Argentina/Instituto de Ciencias Básicas, Universidad Nacional de Cuyo Manuscript received on November 13, 2009; accepted for publication on June 21, 2010 ABSTRACT Speed estimations from trackways of Titanopodus mendozensis González Riga and Calvo provide information about the locomotion of titanosaurian sauropods that lived in South America during the Late Cretaceous. Titanopodus ichnites were found at Agua del Choique, a newly discovered track site in the Loncoche Formation, Late Campanian-Early Maastrichtian of Mendoza, Argentina. This speed study follows the hypothesis of dynamic similarity proposed by Alexander. As a refinement of this method, a complementary equation is presented here based on an articulated titanosaurian specimen collected in strata that are regarded as correlative to those that have yielded Titanopodus tracks (Allen Formation, Neuquén Basin). This analysis indicates that hip height can be estimated as 4.586 times the length of the pes track in derived titanosaurs. With an estimation of the hip height and the stride measurements, the speed is calculated. The study of two wide-gauge trackways indicates that Titanopodus ichnites were produced by medium- sized titanosaurs (hip height of 211-229 cm) that walked at 4.7-4.9 km/h towards the south and southwest, following, in part, a sinuous pathway.
    [Show full text]
  • Fauna Terrestre De Isla Riesco, Magallanes: Una Revisión Bibliográfica
    Anales Instituto Patagonia (Chile), 2019. Vol. 47(3):7-18 7 ARTÍCULO CIENTÍFICO Fauna terrestre de Isla Riesco, Magallanes: una revisión bibliográfica Terrestrial fauna of Riesco Island, Magallanes: a bibliographic review Javier A. Simonetti1, 2 & Gregor J. Stipicic2, 3 Resumen Casassa et al. 2002; Leppe et al. 2012; Betka et al. Se realizó una revisión de la literatura sobre la 2016). Actualmente, Isla Riesco es foco de estudio fauna terrestre reciente de Isla Riesco, Magallanes. tanto porque las actuales operaciones mineras De 60 publicaciones, que cubren los últimos 140 son consideradas un caso de injusticia ambiental años, extrajimos la información sobre los taxones, (Bustos et al. 2017), como por el significado social temas y lugares estudiados. y ambiental de la ampliación y transformación de la Reserva Nacional Alacalufes en el Parque Nacional Palabras clave: Kawésqar (Zorondo-Rodríguez et al. 2019). arácnidos, insectos, peces, anfibios, mamíferos, aves. Isla Riesco también ha sido objeto de estudios tanto de fauna actual como fósil (e.g., Abstract Markham, 1970; Hünicken et al. 1980), We performed a review of the literature on recent inspirando incluso poemas, como “Tuco tuco terrestrial fauna of Riesco Island, Magallanes. de la Isla Riesco” (Silva, 2002). Si bien existen Information regarding taxa studied, topics covered, publicaciones de difusión y generales sobre la biota and locality of study was retrieved from 60 de la región de Magallanes, incluyendo aquella publications spanning the last 140 years. de Isla Riesco (e.g. Martinic, 1957; Markham, 1971a; Venegas & Sielfeld, 1998), no existe a Key words: la fecha una síntesis de la misma. Con objeto de arachnids, insects, fish, amphibians, mammals, birds.
    [Show full text]
  • The Growth of the Central Andes, 22°S–26°S
    Downloaded from memoirs.gsapubs.org on January 15, 2015 The Geological Society of America Memoir 212 2015 The growth of the central Andes, 22°S–26°S J. Quade* M.P. Dettinger B. Carrapa P. DeCelles K.E. Murray Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA K.W. Huntington Department of Earth and Space Sciences, University of Washington, Seattle, Washington 98195-1310, USA A. Cartwright Mintec, Inc., 3544 East Fort Lowell Road, Tucson, Arizona 85716, USA R.R. Canavan Department of Geology, University of Wyoming, Laramie, Wyoming 82071, USA G. Gehrels Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA M. Clementz Department of Geology, University of Wyoming, Laramie, Wyoming 82071, USA ABSTRACT We synthesize geologic observations with new isotopic evidence for the timing and magnitude of uplift for the central Andes between 22°S and 26°S since the Paleocene. To estimate paleoelevations, we used the stable isotopic composition of carbonates and volcanic glass, combined with another paleoelevation indicator for the central Andes: the distribution of evaporites. Paleoelevation reconstruction using clumped isotope paleothermometry failed due to resetting during burial. The Andes at this latitude rose and broadened eastward in three stages during the Cenozoic. The fi rst, in what is broadly termed the “Incaic” orogeny, ended by the late Eocene, when magmatism and deformation had elevated to ≥4 km the bulk (~50%) of what is now the western and central Andes. The second stage witnessed the gradual building of the easternmost Puna and Eastern Cordillera, starting with deforma- tion as early as 38 Ma, to >3 km by no later than 15 Ma.
    [Show full text]
  • ABSTRACT BOOK a Cura Della Società Geologica Italiana
    https://doi.org/10.3301/ABSGI.2019.04 Milano, 2-5 July 2019 ABSTRACT BOOK a cura della Società Geologica Italiana 3rd International Congress on Stratigraphy GENERAL CHAIRS Marco Balini, Università di Milano, Italy Elisabetta Erba, Università di Milano, Italy - past President Società Geologica Italiana 2015-2017 SCIENTIFIC COMMITTEE Adele Bertini, Peter Brack, William Cavazza, Mauro Coltorti, Piero Di Stefano, Annalisa Ferretti, Stanley C. Finney, Fabio Florindo, Fabrizio Galluzzo, Piero Gianolla, David A.T. Harper, Martin J. Head, Thijs van Kolfschoten, Maria Marino, Simonetta Monechi, Giovanni Monegato, Maria Rose Petrizzo, Claudia Principe, Isabella Raffi, Lorenzo Rook ORGANIZING COMMITTEE The Organizing Committee is composed by members of the Department of Earth Sciences “Ardito Desio” and of the Società Geologica Italiana Lucia Angiolini, Cinzia Bottini, Bernardo Carmina, Domenico Cosentino, Fabrizio Felletti, Daniela Germani, Fabio M. Petti, Alessandro Zuccari FIELD TRIP COMMITTEE Fabrizio Berra, Mattia Marini, Maria Letizia Pampaloni, Marcello Tropeano ABSTRACT BOOK EDITORS Fabio M. Petti, Giulia Innamorati, Bernardo Carmina, Daniela Germani Papers, data, figures, maps and any other material published are covered by the copyright own by the Società Geologica Italiana. DISCLAIMER: The Società Geologica Italiana, the Editors are not responsible for the ideas, opinions, and contents of the papers published; the authors of each paper are responsible for the ideas opinions and con- tents published. La Società Geologica Italiana, i curatori scientifici non sono responsabili delle opinioni espresse e delle affermazioni pubblicate negli articoli: l’autore/i è/sono il/i solo/i responsabile/i. © Società Geologica Italiana, Roma 2019 STRATI 2019 ABSTRACT INDEX ST1.1 History of Stratigraphy in Italian environments (17th – 20th centuries) ........................................
    [Show full text]