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  • 1
    Call number: 9/M 07.0421(532)
    In: Special publications / the Geological Society, London, Volume
    Description / Table of Contents: The Ordovician is one of the longest and geologically most active periods in Phanerozoic history. The unique Ordovician biodiversifications established modern marine ecosystems, whereas the first plants originated on land. The two volumes cover all key topics on Ordovician research and provide a review of Ordovician successions across the globe.
    Type of Medium: Monograph available for loan
    Pages: vi, 514 Seiten , Illustrationen, Karten
    ISBN: 9781786205889 , 978-1-78620-588-9
    Series Statement: Geological Society special publication 532
    Language: English
    Note: Title description Full Access10 May 2023 About this title - A Global Synthesis of the Ordovician System: Part 1 D. A. T. Harper, B. Lefebvre, I. G. Percival, and T. Servais https://doi.org/10.1144/SP532 Introduction Full Access10 March 2023 The Ordovician System: Key concepts, events and its distribution across Europe David A. T. Harper, Bertrand Lefebvre, Ian G. Percival, and Thomas Servais https://doi.org/10.1144/SP532-2023-8 Conceptualizing the Ordovician Period Open Access24 January 2023 A short history of the Ordovician System: from overlapping unit stratotypes to global stratotype sections and points David A. T. Harper, Tõnu Meidla, and Thomas Servais https://doi.org/10.1144/SP532-2022-285 Open Access15 December 2022 Ordovician biostratigraphy: index fossils, biozones and correlation Daniel Goldman, Stephen A. Leslie, Yan Liang, and Stig M. Bergström https://doi.org/10.1144/SP532-2022-49 Open Access9 January 2023 Ordovician cyclostratigraphy and astrochronology Matthias Sinnesael https://doi.org/10.1144/SP532-2022-31 Full Access3 March 2023 Ordovician tephra distribution, tephrochronology and geochronology Patrick I. McLaughlin, Leon Normore, Bryan K. Sell, and Jahandar Ramezani https://doi.org/10.1144/SP532-2022-267 Full Access28 February 2023 Ordovician plate tectonic and palaeogeographical maps Christopher R. Scotese https://doi.org/10.1144/SP532-2022-311 Full Access10 March 2023 Changing palaeobiogeography during the Ordovician Period Thomas Servais, David A. T. Harper, Björn Kröger, Christopher Scotese, Alycia L. Stigall, and Yong-Yi Zhen https://doi.org/10.1144/SP532-2022-168 Full Access20 January 2023 Seawater signatures of Ordovician climate and environment Seth A. Young, Cole T. Edwards, Leho Ainsaar, Anders Lindskog, and Matthew R. Saltzman https://doi.org/10.1144/SP532-2022-258 Full Access15 December 2022 The Ordovician ocean circulation: a modern synthesis based on data and models Alexandre Pohl, Elise Nardin, Thijs R. A. Vandenbroucke, and Yannick Donnadieu https://doi.org/10.1144/SP532-2022-1 Open Access10 November 2022 Terrestrialization in the Ordovician Charles H. Wellman, Borja Cascales-Miñana, and Thomas Servais https://doi.org/10.1144/SP532-2022-92 The Ordovician System in Europe Open Access8 February 2023 A synopsis of the Ordovician System in its birthplace – Britain and Ireland Stewart G. Molyneux, David A. T. Harper, Mark R. Cooper, Steven Philip Hollis, Robert J. Raine, Adrian W. A. Rushton, M. Paul Smith, Philip Stone, Mark Williams, ... https://doi.org/10.1144/SP532-2022-235 Open Access18 January 2023 The Ordovician of Scandinavia: a revised regional stage classification Arne Thorshøj Nielsen, Per Ahlberg, Jan Ove R. Ebbestad, Øyvind Hammer, David Alexander Taylor Harper, Anders Lindskog, Christian Mac Ørum Rasmussen, and Svend Stouge https://doi.org/10.1144/SP532-2022-157 Open Access18 November 2022 Ordovician of the Eastern Baltic palaeobasin and the Tornquist Sea margin of Baltica Tõnu Meidla, Leho Ainsaar, Olle Hints, and Sigitas Radzevičius https://doi.org/10.1144/SP532-2022-141 Full Access6 December 2022 Stratigraphy and Sedimentary Record of the Ordovician System in Poland: a Review Wiesław Trela https://doi.org/10.1144/SP532-2022-109 Full Access14 February 2023 The Ordovician of France and neighbouring areas of Belgium and Germany Bertrand Lefebvre, J. Javier Álvaro, Josep Maria Casas, Jean-François Ghienne, Alain Herbosch, Alfredo Loi, Eric Monceret, Jacques Verniers, Muriel Vidal, Daniel Vizcaïno, and Thomas Servais https://doi.org/10.1144/SP532-2022-268 Full Access24 November 2022 The Ordovician of Sardinia (Italy): from the ‘Sardic Phase’ to the end-Ordovician glaciation, palaeogeography and geodynamic context Alfredo Loi, Fabrizio Cocco, Giacomo Oggiano, Antonio Funedda, Muriel Vidal, Annalisa Ferretti, Francesco Leone, Sebastiano Barca, Stefano Naitza, Jean-François Ghienne, and Gian Luigi Pillola https://doi.org/10.1144/SP532-2022-121 Full Access8 February 2023 Ordovician of the Bohemian Massif Petr Kraft, Ulf Linnemann, Michal Mergl, Jana Bruthansová, Lukáš Laibl, and Gerd Geyer https://doi.org/10.1144/SP532-2022-191 Full Access16 January 2023 A global view on the Ordovician stratigraphy of southeastern Europe Annalisa Ferretti, Hans Peter Schönlaub, Valeri Sachanski, Gabriella Bagnoli, Enrico Serpagli, Gian Battista Vai, Slavcho Yanev, Miloš Radonjić, Constantin Balica, Luca Bianchini, ... https://doi.org/10.1144/SP532-2022-174
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  • 2
    Call number: 10.1144/SP532
    In: Special publications / the Geological Society, London, Volume 532
    Description / Table of Contents: The Ordovician is one of the longest and geologically most active periods in Phanerozoic history. The unique Ordovician biodiversifications established modern marine ecosystems, whereas the first plants originated on land. The two volumes cover all key topics on Ordovician research and provide a review of Ordovician successions across the globe.
    Type of Medium: 12
    Pages: 1 Online Ressource (vi, 514 Seiten) , Illustrationen, Karten
    ISBN: 9781786209733
    Series Statement: Geological Society special publication 532
    Language: English
    Note: Title description Full Access10 May 2023 About this title - A Global Synthesis of the Ordovician System: Part 1 D. A. T. Harper, B. Lefebvre, I. G. Percival, and T. Servais https://doi.org/10.1144/SP532 Introduction Full Access10 March 2023 The Ordovician System: Key concepts, events and its distribution across Europe David A. T. Harper, Bertrand Lefebvre, Ian G. Percival, and Thomas Servais https://doi.org/10.1144/SP532-2023-8 Conceptualizing the Ordovician Period Open Access24 January 2023 A short history of the Ordovician System: from overlapping unit stratotypes to global stratotype sections and points David A. T. Harper, Tõnu Meidla, and Thomas Servais https://doi.org/10.1144/SP532-2022-285 Open Access15 December 2022 Ordovician biostratigraphy: index fossils, biozones and correlation Daniel Goldman, Stephen A. Leslie, Yan Liang, and Stig M. Bergström https://doi.org/10.1144/SP532-2022-49 Open Access9 January 2023 Ordovician cyclostratigraphy and astrochronology Matthias Sinnesael https://doi.org/10.1144/SP532-2022-31 Full Access3 March 2023 Ordovician tephra distribution, tephrochronology and geochronology Patrick I. McLaughlin, Leon Normore, Bryan K. Sell, and Jahandar Ramezani https://doi.org/10.1144/SP532-2022-267 Full Access28 February 2023 Ordovician plate tectonic and palaeogeographical maps Christopher R. Scotese https://doi.org/10.1144/SP532-2022-311 Full Access10 March 2023 Changing palaeobiogeography during the Ordovician Period Thomas Servais, David A. T. Harper, Björn Kröger, Christopher Scotese, Alycia L. Stigall, and Yong-Yi Zhen https://doi.org/10.1144/SP532-2022-168 Full Access20 January 2023 Seawater signatures of Ordovician climate and environment Seth A. Young, Cole T. Edwards, Leho Ainsaar, Anders Lindskog, and Matthew R. Saltzman https://doi.org/10.1144/SP532-2022-258 Full Access15 December 2022 The Ordovician ocean circulation: a modern synthesis based on data and models Alexandre Pohl, Elise Nardin, Thijs R. A. Vandenbroucke, and Yannick Donnadieu https://doi.org/10.1144/SP532-2022-1 Open Access10 November 2022 Terrestrialization in the Ordovician Charles H. Wellman, Borja Cascales-Miñana, and Thomas Servais https://doi.org/10.1144/SP532-2022-92 The Ordovician System in Europe Open Access8 February 2023 A synopsis of the Ordovician System in its birthplace – Britain and Ireland Stewart G. Molyneux, David A. T. Harper, Mark R. Cooper, Steven Philip Hollis, Robert J. Raine, Adrian W. A. Rushton, M. Paul Smith, Philip Stone, Mark Williams, ... https://doi.org/10.1144/SP532-2022-235 Open Access18 January 2023 The Ordovician of Scandinavia: a revised regional stage classification Arne Thorshøj Nielsen, Per Ahlberg, Jan Ove R. Ebbestad, Øyvind Hammer, David Alexander Taylor Harper, Anders Lindskog, Christian Mac Ørum Rasmussen, and Svend Stouge https://doi.org/10.1144/SP532-2022-157 Open Access18 November 2022 Ordovician of the Eastern Baltic palaeobasin and the Tornquist Sea margin of Baltica Tõnu Meidla, Leho Ainsaar, Olle Hints, and Sigitas Radzevičius https://doi.org/10.1144/SP532-2022-141 Full Access6 December 2022 Stratigraphy and Sedimentary Record of the Ordovician System in Poland: a Review Wiesław Trela https://doi.org/10.1144/SP532-2022-109 Full Access14 February 2023 The Ordovician of France and neighbouring areas of Belgium and Germany Bertrand Lefebvre, J. Javier Álvaro, Josep Maria Casas, Jean-François Ghienne, Alain Herbosch, Alfredo Loi, Eric Monceret, Jacques Verniers, Muriel Vidal, Daniel Vizcaïno, and Thomas Servais https://doi.org/10.1144/SP532-2022-268 Full Access24 November 2022 The Ordovician of Sardinia (Italy): from the ‘Sardic Phase’ to the end-Ordovician glaciation, palaeogeography and geodynamic context Alfredo Loi, Fabrizio Cocco, Giacomo Oggiano, Antonio Funedda, Muriel Vidal, Annalisa Ferretti, Francesco Leone, Sebastiano Barca, Stefano Naitza, Jean-François Ghienne, and Gian Luigi Pillola https://doi.org/10.1144/SP532-2022-121 Full Access8 February 2023 Ordovician of the Bohemian Massif Petr Kraft, Ulf Linnemann, Michal Mergl, Jana Bruthansová, Lukáš Laibl, and Gerd Geyer https://doi.org/10.1144/SP532-2022-191 Full Access16 January 2023 A global view on the Ordovician stratigraphy of southeastern Europe Annalisa Ferretti, Hans Peter Schönlaub, Valeri Sachanski, Gabriella Bagnoli, Enrico Serpagli, Gian Battista Vai, Slavcho Yanev, Miloš Radonjić, Constantin Balica, Luca Bianchini, ... https://doi.org/10.1144/SP532-2022-174
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  • 3
    Call number: 9/M 07.0421(533)
    In: Special publications / the Geological Society, London, Volume 533
    Description / Table of Contents: The Ordovician is one of the longest and geologically most active periods in Phanerozoic history. The unique Ordovician biodiversifications established modern marine ecosystems, whereas the first plants originated on land. The two volumes cover all key topics on Ordovician research and provide a review of Ordovician successions across the globe.
    Type of Medium: Monograph available for loan
    Pages: vi, 618 Seiten , Illustrationen, Karten
    ISBN: 9781786209740 , 978-1-78620-589-6
    Series Statement: Special publications / the Geological Society, London 533
    Language: English
    Note: About this title - A Global Synthesis of the Ordovician System: Part 2 T. Servais, D. A. T. Harper, B. Lefebvre, and I. G. Percival https://doi.org/10.1144/SP533 Introduction Full Access16 March 2023 A journey through the Ordovician System around the world Thomas Servais, David A. T. Harper, Bertrand Lefebvre, and Ian G. Percival https://doi.org/10.1144/SP533-2023-23 Articles Full Access28 November 2022 Ordovician geology of Alaska Julie A. Dumoulin, Justin V. Strauss, and John E. Repetski https://doi.org/10.1144/SP533-2022-39 Full Access6 February 2023 The Ordovician System in Greenland Svend Stouge, Christian M. Ø. Rasmussen, and David A. T. Harper https://doi.org/10.1144/SP533-2022-193 Full Access20 January 2023 The Ordovician System of Canada: an extensive stratigraphic record of Laurentian shallow water platforms and deep marine basins André Desrochers, Jisuo Jin, and Keith Dewing https://doi.org/10.1144/SP533-2022-151 Full Access1 February 2023 Ordovician of the conterminous United States Patrick I. McLaughlin and Alycia L. Stigall https://doi.org/10.1144/SP533-2022-198 Full Access8 February 2023 Ordovician stratigraphy and biota of Mexico Francisco Javier Cuen-Romero, Blanca Estela Buitrón-Sánchez, Matilde S. Beresi, Juan J. Palafox-Reyes, and Rogelio Monreal https://doi.org/10.1144/SP533-2022-19 Full Access6 January 2023 The Ordovician of southern South America Beatriz G. Waisfeld, Juan Luis Benedetto, Blanca A. Toro, Gustavo G. Voldman, Claudia V. Rubinstein, Susana Heredia, Mario L. Assine, N. Emilio Vaccari, and Hans Niemeyer https://doi.org/10.1144/SP533-2022-95 Full Access6 February 2023 The Ordovician System of South Africa: a review C. R. Penn-Clarke, C. Browning, and D. A. T. Harper https://doi.org/10.1144/SP533-2022-23 Open Access10 February 2023 The Ordovician record of North and West Africa: unravelling sea-level variations, Gondwana tectonics, and the glacial impact Jean-François Ghienne, Hussein Abdallah, Rémy Deschamps, Michel Guiraud, Juan Carlos Gutiérrez-Marco, Moussa Konaté, Guido Meinhold,… https://doi.org/10.1144/SP533-2022-213 Full Access15 February 2023 The Ordovician System in the Levant region (Middle East) and southern Turkey: review of depositional facies, fauna and stratigraphy Olaf Elicki, Tim Meischner, Semih Gürsu, Jean-François Ghienne, Ahmad Masri, Khaled Ali Moumani, and Huriye Demircan https://doi.org/10.1144/SP533-2022-53 Full Access22 November 2022 The Ordovician of the Middle East (Iran, Afghanistan, Pakistan) Mansoureh Ghobadi Pour and Leonid E. Popov https://doi.org/10.1144/SP533-2022-149 Full Access19 December 2022 The Ordovician of Central Asia (Kyrgyzstan, Uzbekistan and Tajikistan) Mansoureh Ghobadi Pour, Leonid E. Popov, Aleksey I. Kim, Zoja M. Abduazimova, Alexander V. Mikolaichuk, Irina A. Kim, Narima Ospanova, Maya V. Erina,… https://doi.org/10.1144/SP533-2022-52 Full Access1 March 2023 Ordovician of Kazakhstan Leonid Popov, Aidarkhan Zhylkaidarov, Vyacheslav Zhemchuzhnikov, Wladimir Stepanets, Nina Mikhailovna Gridina, and Rostislav Mikhailovich Antonyuk https://doi.org/10.1144/SP533-2022-245 Full Access6 January 2023 Ordovician strata of the Indian subcontinent Paul M. Myrow, Nigel C. Hughes, and Birendra P. Singh https://doi.org/10.1144/SP533-2022-3 Full Access10 March 2023 Regional synthesis of the Ordovician geology and stratigraphy of China Yuandong Zhang, Renbin Zhan, Yong Yi Zhen, Wenhui Wang, Yan Liang, Xiang Fang, Rongchang Wu, Kui Yan, Junpeng Zhang, and Wenjie Li https://doi.org/10.1144/SP533-2022-128 Full Access5 December 2022 The Ordovician of the Korean Peninsula: a synthesis Jeong-Hyun Lee, Se Hyun Cho, Suk-Joo Choh, Jongsun Hong, Byung-Su Lee, Dong-Chan Lee, Dong-Jin Lee, Seung-Bae Lee, Jino Park, and Jusun Woo https://doi.org/10.1144/SP533-2022-48 Full Access6 February 2023 Ordovician Japan: geotectonic setting and palaeogeography Yukio Isozaki https://doi.org/10.1144/SP533-2022-80 Full Access2 March 2023 Ordovician geology of the Sibumasu Block, SE Asia Sachiko Agematsu and Thura Oo https://doi.org/10.1144/SP533-2022-200 Full Access8 March 2023 Current knowledge of the Ordovician System in Antarctica Ian G. Percival, Richard A. Glen, and Yong Yi Zhen https://doi.org/10.1144/SP533-2022-116 Full Access16 March 2023 The Ordovician System in Australia and New Zealand Ian G. Percival, Yong Yi Zhen, and Leon Normore https://doi.org/10.1144/SP533-2022-265
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  • 4
    Call number: 10.1144/SP533
    In: Special publications / the Geological Society, London, Volume 533
    Description / Table of Contents: The Ordovician is one of the longest and geologically most active periods in Phanerozoic history. The unique Ordovician biodiversifications established modern marine ecosystems, whereas the first plants originated on land. The two volumes cover all key topics on Ordovician research and provide a review of Ordovician successions across the globe.
    Type of Medium: 12
    Pages: 1 Online Ressource (vi, 618 Seiten) , Illustrationen, Karten
    ISBN: 9781786209740 , 978-1-78620-589-6
    Series Statement: Special publications / the Geological Society, London 533
    Language: English
    Note: About this title - A Global Synthesis of the Ordovician System: Part 2 T. Servais, D. A. T. Harper, B. Lefebvre, and I. G. Percival https://doi.org/10.1144/SP533 Introduction Full Access16 March 2023 A journey through the Ordovician System around the world Thomas Servais, David A. T. Harper, Bertrand Lefebvre, and Ian G. Percival https://doi.org/10.1144/SP533-2023-23 Articles Full Access28 November 2022 Ordovician geology of Alaska Julie A. Dumoulin, Justin V. Strauss, and John E. Repetski https://doi.org/10.1144/SP533-2022-39 Full Access6 February 2023 The Ordovician System in Greenland Svend Stouge, Christian M. Ø. Rasmussen, and David A. T. Harper https://doi.org/10.1144/SP533-2022-193 Full Access20 January 2023 The Ordovician System of Canada: an extensive stratigraphic record of Laurentian shallow water platforms and deep marine basins André Desrochers, Jisuo Jin, and Keith Dewing https://doi.org/10.1144/SP533-2022-151 Full Access1 February 2023 Ordovician of the conterminous United States Patrick I. McLaughlin and Alycia L. Stigall https://doi.org/10.1144/SP533-2022-198 Full Access8 February 2023 Ordovician stratigraphy and biota of Mexico Francisco Javier Cuen-Romero, Blanca Estela Buitrón-Sánchez, Matilde S. Beresi, Juan J. Palafox-Reyes, and Rogelio Monreal https://doi.org/10.1144/SP533-2022-19 Full Access6 January 2023 The Ordovician of southern South America Beatriz G. Waisfeld, Juan Luis Benedetto, Blanca A. Toro, Gustavo G. Voldman, Claudia V. Rubinstein, Susana Heredia, Mario L. Assine, N. Emilio Vaccari, and Hans Niemeyer https://doi.org/10.1144/SP533-2022-95 Full Access6 February 2023 The Ordovician System of South Africa: a review C. R. Penn-Clarke, C. Browning, and D. A. T. Harper https://doi.org/10.1144/SP533-2022-23 Open Access10 February 2023 The Ordovician record of North and West Africa: unravelling sea-level variations, Gondwana tectonics, and the glacial impact Jean-François Ghienne, Hussein Abdallah, Rémy Deschamps, Michel Guiraud, Juan Carlos Gutiérrez-Marco, Moussa Konaté, Guido Meinhold,… https://doi.org/10.1144/SP533-2022-213 Full Access15 February 2023 The Ordovician System in the Levant region (Middle East) and southern Turkey: review of depositional facies, fauna and stratigraphy Olaf Elicki, Tim Meischner, Semih Gürsu, Jean-François Ghienne, Ahmad Masri, Khaled Ali Moumani, and Huriye Demircan https://doi.org/10.1144/SP533-2022-53 Full Access22 November 2022 The Ordovician of the Middle East (Iran, Afghanistan, Pakistan) Mansoureh Ghobadi Pour and Leonid E. Popov https://doi.org/10.1144/SP533-2022-149 Full Access19 December 2022 The Ordovician of Central Asia (Kyrgyzstan, Uzbekistan and Tajikistan) Mansoureh Ghobadi Pour, Leonid E. Popov, Aleksey I. Kim, Zoja M. Abduazimova, Alexander V. Mikolaichuk, Irina A. Kim, Narima Ospanova, Maya V. Erina,… https://doi.org/10.1144/SP533-2022-52 Full Access1 March 2023 Ordovician of Kazakhstan Leonid Popov, Aidarkhan Zhylkaidarov, Vyacheslav Zhemchuzhnikov, Wladimir Stepanets, Nina Mikhailovna Gridina, and Rostislav Mikhailovich Antonyuk https://doi.org/10.1144/SP533-2022-245 Full Access6 January 2023 Ordovician strata of the Indian subcontinent Paul M. Myrow, Nigel C. Hughes, and Birendra P. Singh https://doi.org/10.1144/SP533-2022-3 Full Access10 March 2023 Regional synthesis of the Ordovician geology and stratigraphy of China Yuandong Zhang, Renbin Zhan, Yong Yi Zhen, Wenhui Wang, Yan Liang, Xiang Fang, Rongchang Wu, Kui Yan, Junpeng Zhang, and Wenjie Li https://doi.org/10.1144/SP533-2022-128 Full Access5 December 2022 The Ordovician of the Korean Peninsula: a synthesis Jeong-Hyun Lee, Se Hyun Cho, Suk-Joo Choh, Jongsun Hong, Byung-Su Lee, Dong-Chan Lee, Dong-Jin Lee, Seung-Bae Lee, Jino Park, and Jusun Woo https://doi.org/10.1144/SP533-2022-48 Full Access6 February 2023 Ordovician Japan: geotectonic setting and palaeogeography Yukio Isozaki https://doi.org/10.1144/SP533-2022-80 Full Access2 March 2023 Ordovician geology of the Sibumasu Block, SE Asia Sachiko Agematsu and Thura Oo https://doi.org/10.1144/SP533-2022-200 Full Access8 March 2023 Current knowledge of the Ordovician System in Antarctica Ian G. Percival, Richard A. Glen, and Yong Yi Zhen https://doi.org/10.1144/SP533-2022-116 Full Access16 March 2023 The Ordovician System in Australia and New Zealand Ian G. Percival, Yong Yi Zhen, and Leon Normore https://doi.org/10.1144/SP533-2022-265
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  • 5
    Publication Date: 2021-04-25
    Description: The first starfish bed to be recognized from the Antilles is a lensoid body in the middle Miocene Grand Bay Formation of Carriacou, The Grenadines (West Indies). This unit was deposited in a turbidite basin in a region of active volcanism fed from one centre and preserves common deep-water taxa more typical of the Palaeozoic, such as crinoids and brachiopods. The starfish bed is a channel-fill deposit laid down in at least 150–200 m water depth, although the specimens may have been derived from shallower water. A goniasterid asteroid and an ophiacanthid ophiuroid have been recognized. The first articulated asteroid from the Antillean fossil record is Paragonaster(?) haldixoni sp. nov. In all skeletal features it appears close to the extant Atlantic species Paragonaster grandis H. L. Clark and P. subtilis (Perrier), but differs in having a single row of rectangular abactinal ossicles extending to the arm tip; these are longer than wide. The brittlestar, Ophiocamax ventosa sp. nov., is described on the basis of a fragmentary disc and arms from this deposit. The closest similarities are with the extant tropical western Atlantic species Ophiocamax hystrix Lyman and O. austera Verrill. However, the new species has thorns covering the entire surface of dorsal arm plates, while arm spines have a multitude of small thorns, loosely arranged in numerous rows and dorsal arm plate shape differs markedly. The occurrence of O. ventosa sp. nov. suggests that Ophiocamax has been a deep-sea taxon at least since the Miocene.
    Keywords: Asteroidea; Goniasteridae; Ophiuroidea; Ophiocanthidae; deep water ; 551
    Language: German
    Type: article , publishedVersion
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  • 6
    Publication Date: 2022-05-25
    Description: Author Posting. © Nature Publishing Group, 2007. This is the author's version of the work. It is posted here by permission of Nature Publishing Group for personal use, not for redistribution. The definitive version was published in Nature Geoscience 1 (2008): 49-53, doi:10.1038/ngeo.2007.37.
    Description: The rise and diversification of shelled invertebrate life in the early Phanerozoic took place in two major steps. During the Cambrian Explosion at ca. 540 Ma a large number of new phyla appeared over a short time interval. Biodiversity at the family, genus and species level, however, remained low until the Great Ordovician Biodiversification Event (GOBE) in the mid-Ordovician. This event represents the most intense phase of species radiation during the Paleozoic and the biological component of planet's seafloors was irreversibly changed. The causes of the GOBE remain elusive mainly because of a lack of detailed data relating faunal to environmental change. Here we show that the onset of the major phase of the GOBE coincides at ca. 470 Ma with the disruption in the asteroid belt of the L chondrite parent body, the largest documented asteroid breakup event during the last few billion years. The precise coincidence between an event in space and on Earth is established by bed-by-bed records of extraterrestrial chromite, osmium isotopes and invertebrate fossils in mid- Ordovician strata in Baltoscandia and China. We argue that frequent impacts on Earth of kilometer-sized asteroids accelerated the biodiversification. This is supported also by abundant mid-Ordovician fossil meteorites and impact craters.
    Description: This study was supported by funds to B.S. from the National Geographic Society, Swedish Research Council (VR) and Crafoord Foundation and to D.A.T.H. from the Carlsberg Foundation.
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
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  • 7
    Publication Date: 2022-05-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Schmitz, B., Farley, K. A., Goderis, S., Heck, P. R., Bergström, S. M., Boschi, S., Claeys, P., Debaille, V., Dronov, A., van Ginneken, M., Harper, D. A. T., Iqbal, F., Friberg, J., Liao, S., Martin, E., Meier, M. M. M., Peucker-Ehrenbrink, B., Soens, B., Wieler, R., & Terfelt, F. An extraterrestrial trigger for the mid-ordovician ice age: Dust from the breakup of the L-chondrite parent body. Science Advances, 5(9), (2019): eaax4184, doi:10.1126/sciadv.aax4184.
    Description: The breakup of the L-chondrite parent body in the asteroid belt 466 million years (Ma) ago still delivers almost a third of all meteorites falling on Earth. Our new extraterrestrial chromite and 3He data for Ordovician sediments show that the breakup took place just at the onset of a major, eustatic sea level fall previously attributed to an Ordovician ice age. Shortly after the breakup, the flux to Earth of the most fine-grained, extraterrestrial material increased by three to four orders of magnitude. In the present stratosphere, extraterrestrial dust represents 1% of all the dust and has no climatic significance. Extraordinary amounts of dust in the entire inner solar system during 〉2 Ma following the L-chondrite breakup cooled Earth and triggered Ordovician icehouse conditions, sea level fall, and major faunal turnovers related to the Great Ordovician Biodiversification Event.
    Description: B.Sc. was supported by the Swedish Research Council, the Knut and Alice Wallenberg Foundation, and an ERC-Advanced grant (ASTROGEOBIOSPHERE 213000). P.R.H. was supported by the Tawani Foundation. M.M.M.M. was supported by an Ambizione grant from the Swiss National Science Foundation. A.D. was supported by the Regional Governmental Program of Competitive Growth of Kazan Federal University and Russian Foundation for Basic Research (grant N19-05-00748). D.A.T.H. was supported by a fellowship from the Leverhulme Trust. S.G., P.C., M.v.G., and B.So. were supported by the Belgian Science Policy (Belspo), the FWO, and the VUB strategic program. V.D. was supported by the FRS-FNRS, Belspo, and the ERC-Starting Grant (ISoSyC 336718).
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 8
    Publication Date: 2009-12-16
    Description: During the early to mid-Ordovician, marine life experienced an unprecedented rise in diversity at the species, genus and family levels that firmly installed the suspension-feeding benthos as the main component of the Palaeozoic fauna. The earlier Ordovician was characterized by a wide dispersal of the continents together with a high frequency of microcontinents and volcanic arcs. Magmatic and tectonic activity was intense, climates were warm and sea levels were high. Central to the entire diversification is the role of gamma (inter-provincial) diversity and by implication the spread of the continents and frequency of island arcs and microcontinents. A disparate group of continental fragments and island arcs loosely assigned to the Celtic province contained distinctive shelly faunas that formed a testable biogeographical unit. The Celtic faunas are characterized by a large number of endemic brachiopod taxa, some cosmopolitan forms, and taxa at the beginning or end of their stratigraphical ranges. The associated trilobite faunas are composed largely of wide-ranging genera, a few genera at the start of their stratigraphical range and some recently evolved taxa extending their geographical range. The Celtic province helped provide a burst of gamma diversity during the early stages of the Ordovician Radiation whereas the timing and position of the archipelagos associated with the Celtic province may have provided a mechanism for the diachroneity associated with the diversification.
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  • 9
    Publication Date: 2002-01-01
    Description: During the Arenig-Llanvirn interval a series of radiations across all the major clades, established the Brachiopoda as a major component of the Palaeozoic benthos. Radiations on Baltica and Laurentia during the Arenig formed the basis for two distinct biogeographical provinces with contrasting articulated brachiopod faunas. These platform provinces were supplemented by the marginal Celtic and Toquima-Head provinces; the latter included both marginal and intra-ocean island sites. These marginal and intra-oceanic sites may have served as both cradles and museums' alternately providing sources for radiations on the platforms and refugia for otherwise relict taxa. Such terranes also partitioned oceanic circulation patterns within the Iapetus Ocean and provided mosaics of rapidly changing, nearshore unstable environments. In contrast to later Ordovician brachiopod faunas, many early Ordovician genera are reported from only one or two sites in the Iapetus region; narrow geographical ranges are characteristic of many taxa. The strong biogeographic differentiation at the generic level is less marked at the familial and higher levels suggesting a series of late Cambrian and early Ordovician migrations prior to the more regional development of the Arenig-Llanvirn brachiopod biofacies across the Iapetus terranes. However, the origination of many brachiopod taxa apparently occurred outside the Iapetus region suggesting that the initial stages of the Ordovician radiations here were first spiked by a series of immigrations.
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  • 10
    Publication Date: 2011-05-01
    Description: The enigmatic pentameride brachiopod NoetlingiaHall and Clarke, 1893 is revised and its stratigraphic range corrected. The type species Noetlingia tscheffkini occurs only within the upper Darriwilian (Ordovician) of the East Baltic and not in the Silurian as previously assumed. Thus, presently defined, the superfamily Porambonitoidea does not cross the boundary between the Ordovician and Silurian systems. Two other species occurring in the Lower to Middle Ordovician of South China and North America are assigned to Noetlingia.
    Print ISSN: 0022-3360
    Electronic ISSN: 1937-2337
    Topics: Geosciences
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