DOCSLIB.ORG

El Neógeno De Argentina

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
El Neógeno De Argentina ISSN 1514-4186 INSTITUTO SUPERIOR DE CORRELACIÓN GEOLÓGICA (INSUGEO) El Neógeno de Argentina Editores: F. G. Aceñolaza INSUGEO - Facultad de Ciencias Naturales e Instituto Miguel Lillo Universidad Nacional de Tucumán Miguel Lillo 205, 4000 Tucumán, Argentina y R. Herbst INSUGEO - Facultad de Ciencias Naturales e Instituto Miguel Lillo Universidad Nacional de Tucumán Miguel Lillo 205, 4000 Tucumán, Argentina Consejo Nacional de Investigaciones Científicas y Técnicas Facultad de Ciencias Naturales e Instituto Miguel Lillo Universidad Nacional de Tucumán 2000 4 CORRELACIÓN GEOLÓGICA Nº 14 Consejo Nacional de Investigaciones Científicas y Técnicas Universidad Nacional de Tucumán Instituto Superior de Correlación Geológica (INSUGEO) Director Dr. Florencio G. Aceñolaza Directores Alternos Dr. Alejandro Toselli Dr. Alfredo Tineo Consejo Editorial Dr. Florencio Aceñolaza Dr. Guillermo Aceñolaza Dr. Luis Buatois Dra. Susana Esteban Dr. Juan Carlos Gutiérrez Marco (España) Dr. Rafael Herbst Dr. Roberto Lech Dra. María Gabriela Mángano Dr. Hübert Miller (Alemania) Dra. Isabel Rábano (España) Dra. Juana Rossi de Toselli Dr. Julio Saavedra Alonso (España) Dr. Alcides N. Sial (Brasil) Dr. Alfredo Tinello Dr. Alejandro Toselli Dr. Franco Tortello Instituto Superior de Correlación Geológica Miguel Lillo 205 4000 - San Miguel de Tucumán REPÚBLICA ARGENTINA e-mail: [email protected] Tapa: Cartera Cristamine, Aldea Brasilera, Entre Ríos, afloramientos de Formación Paraná, donde se explo- tan niveles de arenas medanosas. CORRELACIÓN GEOLÓGICA Nº 14 5 Indice Prólogo ........................................................................................................................................ 7 Aceñolaza, F. G. La Formación Paraná (Mioceno Medio): estratigrafía, distribución regional y unidades equivalentes........................................................................ 9 Marengo, H. G. Rasgos micropaleontológicos de los depósitos de la transgresión Entrerriense-Paranense en la Cuenca Chaco-Paranense y Noroeste Argentino, República Argentina. ............................................................................................. 29 Sprechman, P., Fernando, L. A. y Martínez, S. Estado actual de los conocimientos sobre la Formación Camacho (Mioceno?-Superior?), Uruguay. ............ 47 Zucol, A. y Brea, M. Análisis fitolítico de la Formación Paraná en la Provincia de Entre Ríos. ........................................................................................................... 67 Del Río, C. Malacofauna de las formaciones Paraná y Puerto Madryn (Mioceno marino, Argentina): su origen, composición y .................................................... 77 significado bioestratigráfico. Barreda, V. y Palamarczuck, S. Estudio palinoestratigráfico del Oligoceno tardío-Mioceno en secciones de la costa patagónica y plataforma continental argentina. ................................................................................................................. 103 Fernández Garrasino, C. y Vrba, Ana. La Formación Paraná: aspectos estratigráficos y estructurales de la región chacoparanense. ............................................... 139 Lech, R., Aceñolaza, F. y Grizinik, M. Icnofacies Skolithos- Ophiomorpha en el Neogeno del Valle inferior del Río Chubut, provincia de Chubut, Argentina. ............................................................................................. 147 Alonso, R. El Terciario de la Puna en tiempos de la ingresión marina paranense. ....................................................................................................................... 163 Herbst, R. La Formación Ituzaingó (Plioceno). Estratigrafía y distribución. ................ 181 Cione, A. L., Azpelicueta, M. M., Bond, M., Carlini, A. A., Casciotta, J. R., Cozzuol, M. A., de la Fuente, M., Gasparini, Z., Goin, F. J., Noriega, J., Scillato-Yané, G. J., Zoibelzon, L., Tonni, E. P., Verzi, D. y Vucetich, M. G. Miocene vertebrates from Entre Ríos province, Argentine. .............................................. 191 Argañaraz, B. y Piña, C. Quelonios de la Formación Ituzaingó (Mioceno superior-Plioceno), en Villa Urquiza, Entre Ríos, Argentina. .......................... 239 6 CORRELACIÓN GEOLÓGICA Nº 14 Brea, M. y Zucol, A. Lignoflora del Cenozoico superior del Noroeste Argentino. ........................................................................................................... 245 Piña, C. y Argañaraz, B. Presencia del género Caiman (Crocodylia: Alligatoridae) en la Formación Ituzaingó (Mioceno Superior Plioceno), Entre Ríos, Argentina .......................................................... 255 Herbst, R., Anzótegui, L. M., Estéban, G. Mautino, L. R., Morton, S. y Nasif, N. Síntesis paleontológica del Mioceno de los valles Calchaquíes, noroeste argentino. .............................................................................................. 263 Instrucciones a los autores ........................................................................................................ 289 CORRELACIÓN GEOLÓGICA Nº 14 7 Prólogo Los depósitos del Neógeno tienen una muy amplia distitribución en el territorio argentino, pudiendo decirse que el debate de sus componentes desde una visión integradora regional re- cién está comenzando. Ocurre que quienes han abordado el estudio de esta parte de la columna geológica normalmente lo han hecho desde la óptica de cada especialidad motivo por el cual muchas veces se han brindado conceptos o interpretaciones distorsionadas. Con el objeto de iniciar un debate sobre este tema, en noviembre de 1999 llevamos adelante una reunión de expertos en el Centro de Investigaciones del CONICET radicado en la ciudad de Diamante (Entre Rios). Para ello se hizo adelante un análisis comparativo y de correlación geológica tomando en consideración los sedimentos marinos y continentales que afloran en la región mesopotámica y del Uruguay. A partir de allí ,con los trabajos expuestos más otros que fueron invitados, iniciamos la tarea de compilar una serie de artículos destinados a compatibilizar las ideas sobre esta temática. El resultado queda expuesto en la presente obra y, naturalmente, los lectores encontrarán muchos puntos de concordancia pero también de discrepancia entre los autores, situación que no nos alarma ya que interpretamos que ello servirá como punto de partida para nuevas discusiones y debates. Desde luego también, que los artículos aquí presentados de ninguna manera agotan ni los temas ni las opiniones. La obra comprende trabajos referidos a la geología regional, paleontología y paleoambientes sobre las formaciones Paraná e Ituzaingó, ambas objeto del debate mencionado. Como interesante ejemplo no queremos dejar pasar por alto la circunstancia que la International Stratigraphic Commission (ISC) y la International Union of Geological Sciences (IUGS), luego de varios años de debate, ambiciosamente definieron la Global Stratigraphic Section and Point (GSSP) en el metro 35 de la sección de Lemme-Carosio, en la provincia de Alexandría, cuenca del Pimonte en el norte de Italia. Allí no solo se fijaron las pautas bioestratigráficas sino que también las resultantes de la magnetoestratigrafía y geología isotópica (Steininger et al, 1997). Asimismo, entre los criterios están, por un lado, los que surgen de la información del nannoplacton y foraminíferos, sino que se los vincula con los que proporcio- nan los vertebrados terrestres, y estudios isotópicos. La precisión lograda en tan arduos debates permitieron lograr, para el continente europeo un alto grado de certidumbre que luego expan- dieron hacia Asia y Norteaérica. El ejemplo del Neógeno holártico, debería ser un desafío para comenzar una tarea similar en el hemisferio sur, que permita calibrar en un futuro no muy lejano nuestras secuencias sedimentarias junto a las de Antártida, Australia y Africa, con aquellas. Es nuestra esperanza que lo expuesto en esta obra sea un comienzo y sirva para potenciar el interés de los colegas para lograrlo. F. G. Aceñolaza y R. Herbst Editores En: Aceñolaza F. G. y Herbst R. (Eds.). INSUGEO, Serie Correlación Geológica, 14: 9-27 El Neógeno de Argentina Tucumán, 2000 - ISSN 1514-4186 La Formación Paraná (Mioceno medio) : estratigrafia, distribucion regional y unidades equivalentes. Florencio G. ACEÑOLAZA1 Abstract.- THE PARANÁ FORMATION (MIDDLE MIOCENE), STRATIGRAPHY AND REGIONAL DISTRIBUTION: A regional- stratigraphical analysis for the Paraná Formation (Middle Miocene) is presented. This is based on historical data in the type localitiy and some other new sections done on several localities of Argentina. The Paraná Formation was deposited during an important transgression over the pampean and patagonian regions, close to the end of the Lower to Middle Miocene. The transgression covered most of central to eastern Argentina, reaching as far as the Andean and Patagonian border. Lime- stones, sandy to argillaceous facies with abundant fossils (molluscs, echinoids, trace fossils, foraminifera, conchostraca, fish and others marine vertebrates etc.) were developed, along the Uruguayan border to the westwards Entre Rios province, in Argentina. In several localities (El Cerro and Paraná city, Molino Doll, etc) the limestone levels do have reef barrier type structure. Some others do present sandy barriers (Cristamine quarry). The fauna and sedimentological characters have been interpreted to be representative of temperate to warm waters and show correlation with outocrops in Patagonia . Key Words: Miocene.
Load more

Recommended publications
  • Pineda-Salgado, 2020 CD
    Universidad Nacional de La Plata Facultad de Ciencias Naturales y Museo Análisis de concentraciones fósiles en la Formación Monte León (Mioceno inferior), en la costa de la provincia de Santa Cruz Gabriela Pineda Salgado Tesis doctoral Directores: Miguel Griffin, Ana Parras 2020 A mi mamá, mi abuela y mi abuelichi A Señor Pantufla y Spock-Uhura, los félidos con más estilo Agradecimientos Al Posgrado de la Facultad de Ciencias Naturales y Museo de la Universidad Nacional de La Plata. A los doctores Miguel Griffin y Ana Parras por dirigirme, por todas las facilidades brindadas para la realización de este trabajo, así como por su ayuda en las labores de campo y por los apoyos obtenidos para exponer parte de los resultados del mismo en reuniones nacionales e internacionales. Al jurado conformado por los doctores Claudia del Río, Miguel Manceñido y Sven Nielsen. A la Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT) por la beca doctoral otorgada a través del Fondo para la Investigación Científica y Tecnológica (FONCyT), en el marco del Proyecto de Investigación Científica y Tecnológica PICT 2012-1726. Al Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) por la beca interna de finalización de doctorado otorgada durante el periodo 2017-2019. Al Instituto de Ciencias de la Tierra y Ambientales de La Pampa (INCITAP, CONICET- UNLPam) y a la Facultad de Ciencias Exactas y Naturales de la UNLPam por ceder el espacio institucional para el desarrollo de esta tesis. A la Administración de Parques Nacionales por autorizar la recolección de muestras en los límites del Parque Nacional Monte León.
    [Show full text]
  • Para Conhecer a Terra: Memórias E Notícias De Geociências No Espaço Lusófono Autor(Es): Lopes, F.C. (Coord.); Andrade, A. I
    Para conhecer a Terra: memórias e notícias de Geociências no espaço lusófono Lopes, F.C. (coord.); Andrade, A. I. (coord.); Henriques, M. H. (coord.); Autor(es): Quinta-Ferreira, M. (coord.); Reis, R. Pena dos (coord.); Barata, M. T. (coord.) Publicado por: Imprensa da Universidade de Coimbra URL persistente: URI:http://hdl.handle.net/10316.2/24406 DOI: DOI:http://dx.doi.org/10.14195/978-989-26-0534-0 Accessed : 11-Oct-2021 03:52:55 A navegação consulta e descarregamento dos títulos inseridos nas Bibliotecas Digitais UC Digitalis, UC Pombalina e UC Impactum, pressupõem a aceitação plena e sem reservas dos Termos e Condições de Uso destas Bibliotecas Digitais, disponíveis em https://digitalis.uc.pt/pt-pt/termos. Conforme exposto nos referidos Termos e Condições de Uso, o descarregamento de títulos de acesso restrito requer uma licença válida de autorização devendo o utilizador aceder ao(s) documento(s) a partir de um endereço de IP da instituição detentora da supramencionada licença. Ao utilizador é apenas permitido o descarregamento para uso pessoal, pelo que o emprego do(s) título(s) descarregado(s) para outro fim, designadamente comercial, carece de autorização do respetivo autor ou editor da obra. Na medida em que todas as obras da UC Digitalis se encontram protegidas pelo Código do Direito de Autor e Direitos Conexos e demais legislação aplicável, toda a cópia, parcial ou total, deste documento, nos casos em que é legalmente admitida, deverá conter ou fazer-se acompanhar por este aviso. pombalina.uc.pt digitalis.uc.pt 9 789892 605111 Série Documentos A presente obra reúne um conjunto de contribuições apresentadas no I Congresso Imprensa da Universidade de Coimbra Internacional de Geociências na CPLP, que decorreu de 14 a 16 de maio de 2012 no Coimbra University Press Auditório da Reitoria da Universidade de Coimbra.
    [Show full text]
  • Mioceno Tardío) De Entre Ríos, Argentina
    Rev. bras. paleontol. 18(3):521-546, Setembro/Dezembro 2015 © 2015 by the Sociedade Brasileira de Paleontologia doi: 10.4072/rbp.2015.3.14 ACTUALIZACIÓN SISTEMÁTICA Y FILOGENIA DE LOS PROTEROTHERIIDAE (MAMMALIA, LITOPTERNA) DEL “MESOPOTAMIENSE” (MIOCENO TARDÍO) DE ENTRE RÍOS, ARGENTINA GABRIELA INÉS SCHMIDT Laboratorio de Paleontología de Vertebrados, Centro de Investigaciones Científi cas y Transferencia de Tecnología a la Producción (CICYTTP-CONICET), Materi y España (E3105BWA), Diamante, Entre Ríos, Argentina. [email protected] ABSTRACT – SYSTEMATIC UPDATE AND PHYLOGENY OF THE PROTEROTHERIIDAE (MAMMALIA, LITOPTERNA) FROM THE “MESOPOTAMIENSE” (LATE MIOCENE) OF ENTRE RÍOS PROVINCE, ARGENTINA. A systematic update of the species of Proterotheriidae (Litopterna) from the “Mesopotamiense” of Entre Ríos Province (Argentina) is performed, and their phylogenetic relationships with other members of the family are tested. Brachytherium cuspidatum Ameghino is validated (considered nomen dubium hitherto) and a sexual dimorphism is proposed for this species. This idea is based on metric, but not morphological, differences among the specimens included in it, which is supported by a discriminant analysis. Neobrachytherium ameghinoi Soria and Proterotherium cervioides Ameghino are also valid, and Epitherium? eversus (Ameghino) is assigned to the genus Diadiaphorus. Detailed descriptions of the specimens are presented for each taxon, and their diagnosis are revised. Key words: Proterotheriidae, Ituzaingó Formation, Entre Ríos Province, systematics, phylogeny. RESUMO – Uma atualização sistemática, das espécies de Proterotheriidae (Litopterna) presentes no “Mesopotamiense” da Província de Entre Ríos, Argentina, é realizada, bem como são testadas as suas relações fi logenéticas com outros integrantes da família. Brachytherium cuspidatum (previamente considerada nomen dubium) é revalidada, e um dimorfi smo sexual é proposto para esta espécie.
    [Show full text]
  • Reveals That Glyptodonts Evolved from Eocene Armadillos
    Molecular Ecology (2016) 25, 3499–3508 doi: 10.1111/mec.13695 Ancient DNA from the extinct South American giant glyptodont Doedicurus sp. (Xenarthra: Glyptodontidae) reveals that glyptodonts evolved from Eocene armadillos KIEREN J. MITCHELL,* AGUSTIN SCANFERLA,† ESTEBAN SOIBELZON,‡ RICARDO BONINI,‡ JAVIER OCHOA§ and ALAN COOPER* *Australian Centre for Ancient DNA, School of Biological Sciences, University of Adelaide, Adelaide, SA 5005, Australia, †CONICET-Instituto de Bio y Geociencias del NOA (IBIGEO), 9 de Julio No 14 (A4405BBB), Rosario de Lerma, Salta, Argentina, ‡Division Paleontologıa de Vertebrados, Facultad de Ciencias Naturales y Museo (UNLP), CONICET, Museo de La Plata, Paseo del Bosque, La Plata, Buenos Aires 1900, Argentina, §Museo Arqueologico e Historico Regional ‘Florentino Ameghino’, Int De Buono y San Pedro, Rıo Tercero, Cordoba X5850, Argentina Abstract Glyptodonts were giant (some of them up to ~2400 kg), heavily armoured relatives of living armadillos, which became extinct during the Late Pleistocene/early Holocene alongside much of the South American megafauna. Although glyptodonts were an important component of Cenozoic South American faunas, their early evolution and phylogenetic affinities within the order Cingulata (armoured New World placental mammals) remain controversial. In this study, we used hybridization enrichment and high-throughput sequencing to obtain a partial mitochondrial genome from Doedicurus sp., the largest (1.5 m tall, and 4 m long) and one of the last surviving glyptodonts. Our molecular phylogenetic analyses revealed that glyptodonts fall within the diver- sity of living armadillos. Reanalysis of morphological data using a molecular ‘back- bone constraint’ revealed several morphological characters that supported a close relationship between glyptodonts and the tiny extant fairy armadillos (Chlamyphori- nae).
    [Show full text]
  • Reef Encounter Reef Encounter
    Volume 30, No. 2 September 2015 Number 42 REEF ENCOUNTER REEF ENCOUNTER United Nations Climate Change Conference Education about Reefs and Climate Change Climate Change: Reef Fish Ecology, Genetic Diversity and Coral Disease Society Honors and Referendum Digital Underwater Cameras Review The News Journal of the International Society for Reef Studies ISSN 0225-27987 REEF ENCOUNTER The News Journal of the International Society for Reef Studies ISRS Information REEF ENCOUNTER Reef Encounter is the magazine style news journal of the International Society for Reef Studies. It was first published in 1983. Following a short break in production it was re-launched in electronic (pdf) form. Contributions are welcome, especially from members. Please submit items directly to the relevant editor (see the back cover for author’s instructions). Coordinating Editor Rupert Ormond (email: [email protected]) Deputy Editor Caroline Rogers (email: [email protected]) Editor Reef Perspectives (Scientific Opinions) Rupert Ormond (email: [email protected]) Editor Reef Currents (General Articles) Caroline Rogers (email: [email protected]) Editors Reef Edge (Scientific Letters) Dennis Hubbard (email: [email protected]) Alastair Harborne (email: [email protected]) Edwin Hernandez-Delgado (email: [email protected]) Nicolas Pascal (email: [email protected]) Editor News & Announcements Sue Wells (email: [email protected]) Editor Book & Product Reviews Walt Jaap (email: [email protected]) INTERNATIONAL SOCIETY FOR REEF STUDIES The International Society for Reef Studies was founded in 1980 at a meeting in Cambridge, UK. Its aim under the constitution is to promote, for the benefit of the public, the production and dissemination of scientific knowledge and understanding concerning coral reefs, both living and fossil.
    [Show full text]
  • First Lizard Remains (Teiidae) from the Miocene of Brazil (Solimões Formation)
    Rev. bras. paleontol. 12(3):225-230, Setembro/Dezembro 2009 © 2009 by the Sociedade Brasileira de Paleontologia doi:10.4072/rbp.2009.3.05 FIRST LIZARD REMAINS (TEIIDAE) FROM THE MIOCENE OF BRAZIL (SOLIMÕES FORMATION) ANNIE SCHMALTZ HSIOU Seção de Paleontologia, Museu de Ciências Naturais, FZB-RS, Av. Salvador França, 1427, 90690-000, Porto Alegre, RS, Brasil. [email protected] ADRIANA MARIA ALBINO CONICET, Departamento de Biología, Universidad Nacional de Mar del Plata, Funes 3250, 7600 Mar del Plata, Argentina. [email protected] JORGE FERIGOLO Seção de Paleontologia, Museu de Ciências Naturais, FZB-RS, Av. Salvador França, 1427, 90690-000, Porto Alegre, RS, Brasil. [email protected] ABSTRACT – The South American Teiidae fossil record is restricted to the Cenozoic, and the most conspicuous remains were found in Early to Late Miocene of Argentina and Middle Miocene of Colombia and Peru, all represented by Tupinambinae lizards. Here, we describe a right fragmentary dentary and one dorsal vertebra collected in the Solimões Formation at the Talismã locality, situated on the Purus River, in the southwestern Brazilian Amazonia (Late Miocene). The material is tentatively conferred to the extinct genus Paradracaena. It represents the first record of lizards for the Neogene southwestern Brazilian Amazonia. Key words: Teiidae, Tupinambinae, Solimões Formation, Miocene, southwestern Brazilian Amazonia. RESUMO – O registro fóssil de Teiidae para a América do Sul é restrito ao Cenozóico. Os fósseis mais significantes são encontrados a partir do Mioceno inferior ao superior da Argentina e Mioceno médio da Colômbia e Peru, principalmente representados pelos Tupinambinae. Neste trabalho descreve-se um fragmento de dentário direito e uma vértebra dorsal coletados em sedimentos da Formação Solimões, na localidade Talismã, alto rio Purus, sudoeste da Amazônia brasileira.
    [Show full text]
  • Academy of Natural Sciences
    Academy of Natural Sciences The Neotropical Cascudinhos: Systematics and Biogeography of the Otocinclus Catfishes (Siluriformes: Loricariidae) Author(s): Scott A. Schaefer Source: Proceedings of the Academy of Natural Sciences of Philadelphia, Vol. 148 (Oct. 31, 1997), pp. 1-120 Published by: Academy of Natural Sciences Stable URL: http://www.jstor.org/stable/4065046 Accessed: 26-03-2015 15:15 UTC REFERENCES Linked references are available on JSTOR for this article: http://www.jstor.org/stable/4065046?seq=1&cid=pdf-reference#references_tab_contents You may need to log in to JSTOR to access the linked references. Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at http://www.jstor.org/page/info/about/policies/terms.jsp JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. Academy of Natural Sciences is collaborating with JSTOR to digitize, preserve and extend access to Proceedings of the Academy of Natural Sciences of Philadelphia. http://www.jstor.org This content downloaded from 192.134.151.170 on Thu, 26 Mar 2015 15:15:03 UTC All use subject to JSTOR Terms and Conditions PROCEEDINGS OF THE ACADEMY OF NATURAL SCIENCES OF PHILADELPIA 148: 1-120. 31 OCTOBER 1997 The Neotropical cascudinhos:Systematics and biogeography of the Otocinclus catfishes (Siluriformes:Loricariidae) SCOTT A. SCHAEFER Department of Ichthyology,American Museumof Natural History, Central Park Westat 79th Street,New York, NY 10024-5192, USA ABSTRACT - The genus OtocinclusCope (1872) of the siluriform family Loricariidaeis diagnosed as monophyletic on the basis of shared derived characters of the cranial and hyobranchial skeleton, dorsal gill arch musculature, and gut.
    [Show full text]
  • O ANNALS of CARNEGIE MUSEUM VOL
    o ANNALS OF CARNEGIE MUSEUM VOL. 74, NUMBER 3, PP. 151^188 30 SEPTEMBER 2005 MIOCENE FOSSIL DECAPODA (CRUSTACEA: BRACHYURA) FROM PATAGONIA, ARGENTINA, AND THEIR PALEOECOLOGICAL SETTING SILVIO CASADIO Universidad Nacional de La Pampa, Uruguay 151, 6300 Santa Rosa, La Pampa, Argentina ([email protected]) RODNEY M. FELDMANN Research Associate, Section of Invertebrate Paleontology; Department of Geology, Kent State University, Kent, Ohio, 44242 ([email protected]) ANA PARRAS Universidad Nacional de La Pampa, Uruguay 151, 6300 Santa Rosa, La Pampa, Argentina ([email protected]) CARRIE E. SCHWEITZER Research Associate, Section of Invertebrate Paleontology; Department of Geology, Kent State University Stark Campus, Canton, OH 44720 ([email protected]) ABSTRACT Five previously undescribed decapod taxa have been collected from lower upper Miocene rocks of the Puerto Madryn Formation, Peninsula Valdes region, Chubut Province, Patagonia, Argentina. New species include Osachila valdesensis, Rochinia boschii, Romaleon parspinosus, Panopeus piramidensis, and Ocypode vericoncava. Chaceon peruvianus and Proterocarcinus latus are also reported from the unit, in addition to two indeterminate xanthoid species. Assignment of fossil taxa to genera within the Panopeidae Ortmann, 1893, is difficult due to the marked similarity in dorsal carapace characters among several genera. Panopeus whittenensis Glaessner, 1980, is herein referred to Pakicarcinus Schweitzer et al., 2004. The Puerto Madryn Formation exposed near Puerto Piramide contains three distinct Facies Associations (1-3), each associated with specific paleoecological and paleoenvironmental conditions, and which recur throughout the section and represent trangressive systems tract (TST) deposits and highstand systems tract (HST) deposits. Within Facies Association 1, near the base of the section at Puerto Piramide, three paleosurfaces containing invertebrate fossils in life position are exposed and have been carefully mapped in plan view.
    [Show full text]
  • IV. Northern South America EIA/ARI World Shale Gas and Shale Oil Resource Assessment
    IV. Northern South America EIA/ARI World Shale Gas and Shale Oil Resource Assessment IV. NORTHERN SOUTH AMERICA SUMMARY Northern South America has prospective shale gas and shale oil potential within marine- deposited Cretaceous shale formations in three main basins: the Middle Magdalena Valley and Llanos basins of Colombia, and the Maracaibo/Catatumbo basins of Venezuela and Colombia, Figure IV-1. The organic-rich Cretaceous shales (La Luna, Capacho, and Gacheta) sourced much of the conventional gas and oil produced in Colombia and western Venezuela, and are similar in age to the Eagle Ford and Niobrara shale plays in the USA. Ecopetrol, ConocoPhillips, ExxonMobil, Shell, and others have initiated shale exploration in Colombia. Colombia’s petroleum fiscal regime is considered attractive to foreign investment. Figure IV-1: Prospective Shale Basins of Northern South America Source: ARI 2013 May 17, 2013 IV-1 IV. Northern South America EIA/ARI World Shale Gas and Shale Oil Resource Assessment For the current EIA/ARI assessment, the Maracaibo-Catatumbo Basin was re-evaluated while new shale resource assessments were undertaken on the Middle Magdalena Valley and Llanos basins. Technically recoverable resources (TRR) of shale gas and shale oil in northern South America are estimated at approximately 222 Tcf and 20.2 billion bbl, Tables IV-1 and IV- 2. Colombia accounts for 6.8 billion barrels and 55 Tcf of risked TRR, while western Venezuela has 13.4 billion barrels and 167 Tcf. Eastern Venezuela may have additional potential but was not assessed due to lack of data. Colombia’s first publicly disclosed shale well logged 230 ft of over-pressured La Luna shale with average 14% porosity.
    [Show full text]
  • Genus/Species Skull Ht Lt Wt Stage Range Abalosia U.Pliocene S America Abelmoschomys U.Miocene E USA A
    Genus/Species Skull Ht Lt Wt Stage Range Abalosia U.Pliocene S America Abelmoschomys U.Miocene E USA A. simpsoni U.Miocene Florida(US) Abra see Ochotona Abrana see Ochotona Abrocoma U.Miocene-Recent Peru A. oblativa 60 cm? U.Holocene Peru Abromys see Perognathus Abrosomys L.Eocene Asia Abrothrix U.Pleistocene-Recent Argentina A. illuteus living Mouse Lujanian-Recent Tucuman(ARG) Abudhabia U.Miocene Asia Acanthion see Hystrix A. brachyura see Hystrix brachyura Acanthomys see Acomys or Tokudaia or Rattus Acarechimys L-M.Miocene Argentina A. minutissimus Miocene Argentina Acaremys U.Oligocene-L.Miocene Argentina A. cf. Murinus Colhuehuapian Chubut(ARG) A. karaikensis Miocene? Argentina A. messor Miocene? Argentina A. minutissimus see Acarechimys minutissimus Argentina A. minutus Miocene? Argentina A. murinus Miocene? Argentina A. sp. L.Miocene Argentina A. tricarinatus Miocene? Argentina Acodon see Akodon A. angustidens see Akodon angustidens Pleistocene Brazil A. clivigenis see Akodon clivigenis Pleistocene Brazil A. internus see Akodon internus Pleistocene Argentina Acomys L.Pliocene-Recent Africa,Europe,W Asia,Crete A. cahirinus living Spiny Mouse U.Pleistocene-Recent Israel A. gaudryi U.Miocene? Greece Aconaemys see Pithanotomys A. fuscus Pliocene-Recent Argentina A. f. fossilis see Aconaemys fuscus Pliocene Argentina Acondemys see Pithanotomys Acritoparamys U.Paleocene-M.Eocene W USA,Asia A. atavus see Paramys atavus A. atwateri Wasatchian W USA A. cf. Francesi Clarkforkian Wyoming(US) A. francesi(francesci) Wasatchian-Bridgerian Wyoming(US) A. wyomingensis Bridgerian Wyoming(US) Acrorhizomys see Clethrionomys Actenomys L.Pliocene-L.Pleistocene Argentina A. maximus Pliocene Argentina Adelomyarion U.Oligocene France A. vireti U.Oligocene France Adelomys U.Eocene France A.
    [Show full text]
  • Short Review of Dental Microstructure and Dental Microwear in Xenarthran Teeth
    231 Short review of dental microstructure and dental microwear in xenarthran teeth Daniela C. Kalthoff Introduction Dentin is one of three tooth tissues occurring in mammals, Also using SEM technique, the most comprehensive and the other two being the hypermineralized tooth enamel detailed histological study to date is from Kalthoff (2011), and tooth cementum. In respect to volume, dentin usu- comprising teeth from about 50 xenarthran taxa dating ally makes up the largest part of the tooth. Interestingly, from late Eocene to Holocene. a number of mammal taxa have reduced the resistant Dental microwear analysis is the study of microscopic layer of tooth enamel during their evolutionary history, scars on the chewing surface of cheek teeth. Last consumed thus focusing on dentin as the main tooth building tissue. food items (and potentially also exogenous grit; Hoffman Enamelless teeth can be found in various extant and ex- et al. 2015) leave these scars, mainly different kinds of tinct taxa of odontocete whales (Odontoceti), aardvarks pits and scratches, during mastication and different food (Tubulidentata), armadillos, glyptodonts and pampatheres categories (leaves, grass, seeds, fruits, meat, insects, (Cingulata), sloths (Folivora), walruses (Odobenidae), sea etc.) produce different kinds of scars. Extant species with cows (Dugongidae), and elephants (Proboscidea). known diets are used to calibrate microwear scars. From This review will give an overview of recent results on the beginning of dental microwear analysis, the highly histology as well as dietary adaptations using the distinctly mineralized enamel had been the target tissue, and this built dentin teeth in armadillos and sloths and their fossil technique has been employed to various mammal clades relatives (in the following referred to with the informal term (e.
    [Show full text]
  • Fossils from India (Late Pliocene)
    RESEARCH ARTICLE The first darter (Aves: Anhingidae) fossils from India (late Pliocene) Thomas Stidham1*, Rajeev Patnaik2, Kewal Krishan3, Bahadur Singh3, Abhik Ghosh3, Ankita Singla2, Simran S. Kotla2 1 Key Laboratory of Vertebrate Evolution and Human Origins of the Chinese Academy of Sciences, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing, China, 2 Department of Geology, Panjab University, Chandigarh, India, 3 Department of Anthropology, Panjab University, Chandigarh, India a1111111111 * [email protected] a1111111111 a1111111111 a1111111111 a1111111111 Abstract New fossils from the latest Pliocene portion of the Tatrot Formation exposed in the Siwalik Hills of northern India represent the first fossil record of a darter (Anhingidae) from India. The darter fossils possibly represent a new species, but the limited information on the fossil OPEN ACCESS record of this group restricts their taxonomic allocation. The Pliocene darter has a deep pit Citation: Stidham T, Patnaik R, Krishan K, Singh B, on the distal face of metatarsal trochlea IV not reported in other anhingids, it has an open Ghosh A, Singla A, et al. (2017) The first darter groove for the m. flexor perforatus et perforans digiti II tendon on the hypotarsus unlike New (Aves: Anhingidae) fossils from India (late World anhingid taxa, and these darter specimens are the youngest of the handful of Neo- Pliocene). PLoS ONE 12(5): e0177129. https://doi. org/10.1371/journal.pone.0177129 gene records of the group from Asia. These fossil specimens begin to fill in a significant geo- graphic and temporal gap in the fossil record of this group that is largely known from other Editor: Thierry Smith, Royal Belgian Institute of Natural Sciences, BELGIUM continents and other time periods.
    [Show full text]