Llandovery microfossils and microfacies of the Hýskov section, Prague Basin

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Abstract

The lower Silurian strata of the Prague Basin, as well as in many other regions, are primarily represented by black shales, with limited to no record of benthic life. In this paper, we describe an exceptional late Aeronian volcanic-carbonate succession from the Hýskov locality near Beroun, which contains a diverse and well-preserved fossil assemblage and specific microfacies features. The studied section is mostly represented by well-washed, poorly sorted skeletal grainstones, rudstones and floatstones along with volcaniclastic material. The environment is interpreted as agitated, above storm wave base, and with rapid sedimentation and burial. The collection of acid-resistant microfossils includes abundant scolecodonts, conodonts and chitinozoans, of which only the chitinozoans have previously been studied. The scolecodonts recovered represent at least 14 polychaete genera and 20 species. The fauna bears a great similarity to the early Silurian assemblages previously reported from Baltica, and some environmentally sensitive species allow constraining the assemblage to shallow-shelf settings. The recovered conodonts similarly show close affinities to Baltic faunas, and suggest a Rhuddanian – Aeronian age for the studied section. The chitinozoan assemblage, containing at least eight species, is dominated by Conochitina, and most likely belongs to the C. alargada Biozone.

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  • Beresi M. S. Aceñolaza G. Nieva S. (2006): Cambro-Ordovician sponges and spicule assemblages from Northwest Argentina: new data from the siliciclastic platforms of western Gondwana. – Neues Jahrbuch für Geologie und Paläontologie Monatshefte 2006(7): 403–420.

  • Bergman C. F. (1995): Symmetroprion spatiosus (Hinde) a jawed polychaete showing preference for reef environments in the Silurian of Gotland. – GFF 117: 143–150. https://doi.org/10.1080/11035899509546210

  • Botting J. P. (2005): Exceptionally-preserved Middle Ordovician sponges from the Llandegley Rocks Lagerstätte central Wales. – Palaeontology 48: 577–617. https://doi.org/10.1111/j.1475-4983.2005.00470.x

  • Bouček B. (1957): The dendroid graptolites of the Silurian of Bohemia. – Rozpravy Ústředního ústavu geolo-gického 23: 1–239.

  • Calner M. Jeppsson L. (2003): Carbonate platform evolution and conodont stratigraphy during the middle Silurian Mulde Event Gotland Sweden. – Geological Magazine 140: 173–203. https://doi.org/10.1017/S0016756802007070

  • Chlupáč I. Havlíček V. Kříž J. Kukal Z. Štorch P. (1998): Palaeozoic of the Barrandian (Cambrian to Devonian). – Czech Geological Survey Prague 183 pp.

  • da Costa N. M. M. (1971): Quitinozoários Silurianos do Igarapé da Rainha Estado do Pará [Silurian chitinozoans of Igarapé da Rainha Pará State Brasil]. – Ministério das Minas e Energia Divisão de Geologia e Mineralogia Boletin 255: 9–97. (in Portugese)

  • Dufka P. (1990): Acritarchs of the Monograptus sedgwickii Zone (Želkovice Formation Llandovery) from Hýskov Barrandian Bohemian Massif. – Acta Universitatis Carolinae Geologica 1990(1): 75–104.

  • Dufka P. (1992): Lower Silurian Chitinozoans of the Prague Basin (Barrandian Czechoslovakia) – preliminary results. – Revue de Micropaléontologie 35(2): 117–126.

  • Eriksson M. (1997): Lower Silurian polychaetaspid polychaetes from Gotland Sweden. – GFF 119(3): 213–230. https://doi.org/10.1080/11035899709546480

  • Eriksson M. (1998): Dubichaetaspis bergmani gen. et sp. n. a facies controlled polychaete from the Silurian of Gotland Sweden. – GFF 120: 21–25. https://doi.org/10.1080/11035899801201021

  • Eriksson M. E. (2006): The Silurian Ireviken Event and vagile benthic faunal turnovers (Polychaeta; Eunicida) on Gotland Sweden. – GFF 128: 91–95. https://doi.org/10.1080/11035890601282091

  • Eriksson M. E. Bergman C. F. Jeppsson L. (2004): Silurian scolecodonts. – Review of Palaeobotany and Palynology 131: 269–300. https://doi.org/10.1016/j.revpalbo.2004.04.001

  • Eriksson M. E. Hints O. Paxton H. Tonarová P. (2013): Ordovician and Silurian polychaete diversity and biogeography. – In: Harper D. A. T. Servais T. (eds) Early Palaeozoic Biogeography and Palaeogeography. Memoirs Geological Society London 38: 265–272. https://doi.org/10.1144/M38.18

  • Frýda J. Štorch P. (2014): Carbon isotope chemostratigraphy of the Llandovery in northern peri-Gondwana: new data from the Barrandian area Czech Republic. – Estonian Journal of Earth Sciences 63(4): 220–226. https://doi.org/10.3176/earth.2014.22

  • Havlíček V. (1977): Brachiopods of the Order Orthida in Czechoslovakia. – Rozpravy Ústředního ústavu geologického 44: 1–327.

  • Havlíček V. Kříž J. (1973): Svrchní llandover a spodní devon u Hýskova (Barrandien) [Upper Llandovery and Lower Devonian near Hýskov (Barrandien)]. – Věstník Ústředního ústavu geologického 48: 103–107. (in Czech with English Abstract)

  • Havlíček V. Štorch P. (1990): Silurian brachiopods and benthic communities in the Prague Basin (Czechoslovakia). – Rozpravy Ústředního ústavu geologického 48: 1–275.

  • Hints L. Hints O. Kaljo D. Kiipli T. Männik P. Nõlvak J. Pärnaste H. (2010): Hirnantian (latest Ordovician) bio- and chemostratigraphy of the Stirnas-18 core western Latvia. – Estonian Journal of Earth Sciences 59(1): 1–24. https://doi.org/10.3176/earth.2010.1.01

  • Hints O. (1998): Late Viruan (Caradoc) polychaete jaws from North Estonia and the St. Petersburg region. – Acta Palaeontologica Polonica 43: 471–516.

  • Hints O. (2000): Ordovician eunicid polychaetes of Estonia and surrounding areas: review of their distribution and diversification. – Review of Palaeobotany and Palynology 113: 41–55. https://doi.org/10.1016/S0034-6667(00)00051-8

  • Hints O. Eriksson M. E. (2007): Diversification and bio-geography of scolecodont-bearing polychaetes in the Ordovician. – Palaeogeography Palaeoclimatology Palaeoecology 254: 95–114. https://doi.org/10.1016/j.palaeo.2006.02.029

  • Hints O. Antonovitš L. Bauert G. Nestor V. Nõlvak J. Tammekänd M. (2018): CHITDB: a database for documenting and analysing diversification of Ordovician–Silurian chitinozoans in the Baltic region. – Lethaia 51: 218–227. https://doi.org/10.1111/let.12249

  • Hints O. Killing M. Männik P. Nestor V. (2006): Frequency patterns of chitinozoans scolecodonts and conodonts in the upper Llandovery and lower Wenlock of the Paatsalu core western Estonia. – Proceedings of the Estonian Academy of Sciences 55(2): 128–155.

  • Hints O. Paris F. Al-Hajri S. (2015): Late Ordovician scolecodonts from the Qusaiba-1 core hole central Saudi Arabia and their paleogeographical affinities. – Review of Palaeobotany and Palynology 212: 85–96. https://doi.org/10.1016/j.revpalbo.2014.08.013

  • Hints O. Tonarová P. Desrochers A. (2016): Late Ordovician jaw-bearing polychaetes from Anticosti Island eastern Canada and their biogeographic significance. – Canadian Journal of Earth Sciences 53(7): 731–738. https://doi.org/10.1139/cjes-2015-0222

  • Jell J. S. Talent J. A. (1989). Australia: the most instructive sections. – In: Holland C. H. Bassett M. G. (eds) A Global Standard for the Silurian System. National Museum of Wales Geological Series 9: 183–200.

  • Johnson M. E. (1996): Stable cratonic sequences and a standard for Silurian eustasy. – In: Witzke B. J. Ludvigson G. A. Day J. (eds) Paleozoic Sequence Stratigraphy: Views From the North American Craton. Geological Society of America Special Paper 306: 203–211. https://doi.org/10.1130/0-8137-2306-X.203

  • Kielan-Jaworowska Z. (1966): Polychaete jaw apparatuses from the Ordovician and Silurian of Poland and comparison with modern forms. – Palaeontologia Polonica 16: 1–152.

  • Kraft J. (1982): Dendroid graptolites of Llandoverian age from Hýskov near Beroun (Barrandian). – Sborník geologických věd Paleontologie 25: 83–95.

  • Kříž J. (1975): Revision of the Lower Silurian stratigraphy in Central Bohemia. – Věstník Ústředního ústavu geologického 50: 275–283.

  • Kříž J. (1991): The Silurian of the Prague Basin (Bohemia) – tectonic eustatic and volcanic controls on facies and faunal development. – In: Bassett M. G. Lane P. D. Edwards D. (eds) The Murchison Symposium: Proceedings of an International Conference on The Silurian System. Special Papers in Palaeontology 44: 179–203.

  • Loydell D. K. (1998): Early Silurian sea-level changes. – Geological Magazine 135(4): 447–471. https://doi.org/10.1017/S0016756898008917

  • Loydell D. K. Nestor V. Männik P. (2010): Integrated biostratigraphy of the lower Silurian of the Kolka-54 core Latvia. – Geological Magazine 147: 253–280. https://doi.org/10.1017/S0016756809990574

  • Männik P. (2003): Distribution of Ordovician and Silurian conodonts. – In: Põldvere A. (ed.) Ruhnu (500) drill core. Estonian Geological Sections 5: 17–23.

  • Männik P. (2008): Conodont dating of some Telychian (Silurian) sections in Estonia. – Estonian Journal of Earth Sciences 57(3): 156–169. https://doi.org/10.3176/earth.2008.3.04

  • Männik P. Loydell D. K. Nestor V. Nõlvak J. (2015): Integrated Upper Ordovician-lower Silurian biostratigraphy of the Grötlingbo-1 core section Sweden. – GFF 137: 226–244. https://doi.org/10.1080/11035897.2015.1042032

  • Männik P. Nestor V. (2014): Stop B5: Panga cliff. – In: Bauert H. Hints O. Meidla T. Männik P. (eds) Abstracts and Field Guide 4th Annual Meeting of IGCP 591 10th–19th June 2014 Estonia University of Tartu Tartu pp. 185–187.

  • Muir L. A. Botting J. P. Carrera M. G. Beresi M. (2013): Cambrian Ordovician and Silurian non-stromatoporoid Porifera. – In: Harper A. T. Servais T. (eds) Early Palaeozoic Biogeography and Palaeogeography. Memoirs Geological Society London 38: 81–95. https://doi.org/10.1144/M38.8

  • Murphy M. A. Valenzuela-Ríos J. I. Carls P. (2004): On classification of Pridoli (Silurian) – Lochkovian (Devonian) Spathognathodontidae (conodonts). – University of California Riverside Campus Museum Contribution 6: 1–25.

  • Nestor H. Einasto R. Männik P. Nestor V. (2003): Correlation of some lower-middle Llandovery reference sections in central and southern Estonia and sedimentation cycles of lime muds. – Proceedings of the Estonian Academy of Sciences Geology 52: 3–27.

  • Nestor V. (1994): Early Silurian chitinozoans of Estonia and North Latvia. – Estonian Academy Publishers Tallinn 163 pp.

  • Nestor V. (2012): A summary and revision of the East Baltic Silurian chitinozoan biozonation. – Estonian Journal of Earth Sciences 61(4): 242–260. https://doi.org/10.3176/earth.2012.4.05

  • Paluveer L. Nestor V. Hints O. (2014): Chitinozoan diversity in the East Baltic Silurian: first results of a quantitative stratigraphic approach with CONOP. – GFF 136(1): 198–202. https://doi.org/10.1080/11035897.2013.873987

  • Rexroad C. B. (1967). Stratigraphy and Conodont Paleontology of the Brassfield (Silurian) in the Cincinnati Arch Area. – Indiana Geological Survey Bulletin B36: 1–64.

  • Rhebergen F. Botting. J. P. (2014): A New Silurian (Llandovery Telychian) sponge assemblage from Gotland Sweden. – Fossils and Strata 60: 1–87. https://doi.org/10.1002/9781118906651.ch1

  • Šnajdr M. (1978): The Llandoverian trilobites from Hýskov (Barrandian area). – Journal of Geological Sciences Palaeontology 21: 7–47.

  • Štorch P. (1986): Ordovician-Silurian boundary in the Prague Basin (Barrandian area Bohemia) – Sborník geologických věd Geologie 41: 69–103.

  • Štorch P. (2001): Graptolites stratigraphy and depositional settings of the middle Llandovery (Silurian) volcanic-carbonate facies at Hýskov (Barrandian area Czech Republic). – Věstník Českého geologického ústavu 76(1): 55–76.

  • Szaniawski H. (1970): Jaw apparatuses of the Ordovician and Silurian polychaetes from the Mielnik borehole. – Acta Palaeontologica Polonica 15: 445–472.

  • Tonarová P. (2008): Revision of Kettnerites Žebera 1935 (Scolecodonta Silurian of the Barrandian area Czech Republic): preliminary results. – Acta Musei Nationalis Pragae Series B Historia Naturalis 64(2-4): 185–192.

  • Tonarová P. Eriksson M. E. Hints O. (2012): A jawed polychaete fauna from the late Ludlow Kozlowskii event interval in the Prague Basin (Czech Republic). – Bulletin of Geosciences 87(4): 713–732. https://doi.org/10.3140/bull.geosci.1317

  • Tonarová P. Hints O. Eriksson M. E. (2014): Impact of the Silurian Ireviken Event on polychaete faunas: new insights from the Viki drill core western Estonia. – GFF 136(1): 270–274. https://doi.org/10.1080/11035897.2013.862855

  • Uyeno T. T. Barnes C. R. (1983): Conodonts of the Jupiter and Chicotte Formations (Lower Silurian) Anticosti Island Quebec. – Geological Survey of Canada Bulletin 355: 1–49. https://doi.org/10.4095/109266

  • Verniers J. Nestor V. Paris F. Dufka P. Sutherland S. Van Grootel G. (1995): A global Chitinozoa biozonation for the Silurian. – Geological Magazine 132(6): 651–666. https://doi.org/10.1017/S0016756800018896

  • Wang C.-Y. Aldridge R. J. (2010): Silurian conodonts from the Yangtze Platform South China. – Special Papers in Palaeontology 83: 1–136.

  • Zhang S. Barnes C. R. (2002): A new Llandovery (Early Silurian) conodont biozonation and conodonts from the Becscie Merrimack and Gun River Formations Anticosti Island Québec. – Journal of Paleontology 76(S57): 1–46. https://doi.org/10.1666/0022-3360(2002)76[1:ANLESC]2.0.CO;2

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