Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-20T02:28:05.331Z Has data issue: false hasContentIssue false
  • English
  • Français

Graptolite and conodont biostratigraphy of the upper Telychian–lower Sheinwoodian (Llandovery–Wenlock) strata, Jabalón River section, Corral de Calatrava, central Spain

Published online by Cambridge University Press:  28 November 2008

D. K. LOYDELL ,
G. N. SARMIENTO ,
P. ŠTORCH  and
J. C. GUTIÉRREZ-MARCO
D. K. LOYDELL*
Affiliation:
School of Earth and Environmental Sciences, University of Portsmouth, Burnaby Road, Portsmouth, PO1 3QL, UK
G. N. SARMIENTO
Affiliation:
Departamento de Paleontología e Instituto de Geología Económica CSIC-UCM, José Antonio Novais 2, 28040 Madrid, Spain
P. ŠTORCH
Affiliation:
Institute of Geology, Academy of Sciences of the Czech Republic, Rozvojová 135, Praha 6, 16500, Czech Republic
J. C. GUTIÉRREZ-MARCO
Affiliation:
Departamento de Paleontología e Instituto de Geología Económica CSIC-UCM, José Antonio Novais 2, 28040 Madrid, Spain
*
*Author for correspondence: david.loydell@port.ac.uk
Get access Rights & Permissions [Opens in a new window]

Abstract

A graptolite biostratigraphy is erected for the upper Telychian (upper crenulata Biozone) to lower Sheinwoodian (riccartonensis or dubius Biozone) strata of the Jabalón River section, Spain. Two unconformities are recognized in the section: one between the lapworthi and murchisoni biozones; the other between the murchisoni and riccartonensis biozones. These unconformities coincide with intervals of lowered eustatic sea-level. Graptolite assemblages include both cosmopolitan taxa and some which have been recorded previously from Morocco and/or other Spanish sections. At some stratigraphical levels Pristiograptus or Euroclimacis species are abundant; Monoclimacis, Streptograptus and Mediograptus species are generally uncommon. Conodonts were examined from the upper spiralis through to lower murchisoni Biozone; the occurrences of Pterospathodus amorphognathoides are consistent with the species' known range elsewhere. Four new graptolite species are described: Euroclimacis jabalonensis, E. hamata, Monoclimacis flexa and Stimulograptus pradoi.

Keywords

graptolitesConodontaSilurianbiostratigraphyCentral Iberian ZoneSpain
Type
Original Article
Information
Geological Magazine , Volume 146 , Issue 2 , March 2009 , pp. 187 - 198
Copyright
Copyright © Cambridge University Press 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Armstrong, H. A. 1990. Conodonts from the Upper Ordovician–Lower Silurian carbonate platform of North Greenland. Grønlands Geologiske Undersøgelse Bulletin 159, 1–151.CrossRefGoogle Scholar
Bjerreskov, M. 1975. Llandoverian and Wenlockian graptolites from Bornholm. Fossils and Strata 8, 1–94.CrossRefGoogle Scholar
Bouček, B. 1953. Biostratigraphy, development and correlation of the Želkovice and Motol Beds of the Silurian of Bohemia. Sborník Ústředního Ústavu Geologického 20, 473–84.Google Scholar
Cortázar, D. 1880. Reseña física y geológica de la provincia de Ciudad Real. Boletín de la Comisión del Mapa Geológico de España 7, 289–330.Google Scholar
García Palacios, A., Gutiérrez-Marco, J. C. & Herranz Araújo, P. 1996. Edad y correlación de la «Cuarcita de Criadero» y otras unidades cuarcíticas del límite Ordovícico- Silúrico en la Zona Centroibérica meridional (España y Portugal). Geogaceta 20, 19–22.Google Scholar
García Palacios, A. & Rábano, I. 1996. Hallazgo de trilobites en pizarras negras graptolíticas del Silúrico inferior (Telychiense, Llandovery) de la Zona Centroibérica (España). Geogaceta 20, 239–41.Google Scholar
Howe, M. P. A. 1983. Measurement of thecal spacing in graptolites. Geological Magazine 120, 635–8.Google Scholar
Jeppsson, L. 1997. A new latest Telychian, Sheinwoodian and early Homerian (early Silurian) standard conodont zonation. Transactions of the Royal Society of Edinburgh: Earth Sciences 88, 91–114.Google Scholar
Loydell, D. K. 1998. Early Silurian sea-level changes. Geological Magazine 135, 447–71.CrossRefGoogle Scholar
Loydell, D. K. & Cave, R. 1993. The Telychian (Upper Llandovery) stratigraphy of Buttington Brick Pit, Wales. Newsletters on Stratigraphy 29, 91–103.Google Scholar
Loydell, D. K. & Cave, R. 1996. The Llandovery-Wenlock boundary and related stratigraphy in eastern mid-Wales with special reference to the Banwy River section. Newsletters on Stratigraphy 34, 39–64.Google Scholar
Loydell, D. K., Kaljo, D. & Männik, P. 1998. Integrated biostratigraphy of the lower Silurian of the Ohesaare core, Saaremaa, Estonia. Geological Magazine 135, 769–83.Google Scholar
Loydell, D. K., Männik, P. & Nestor, V. 2003. Integrated biostratigraphy of the lower Silurian of the Aizpute-41 core, Latvia. Geological Magazine 140, 205–29.CrossRefGoogle Scholar
Lüning, S., Loydell, D. K., Sutcliffe, O., Ait Salem, A., Zanella, E., Craig, J. & Harper, D. A. T. 2000. Silurian–Lower Devonian black shales in Morocco: which are the organically richest horizons? Journal of Petroleum Geology 23, 293–311.Google Scholar
Portero García, J. M., Ancochea, E., Gallardo, J. & Pérez-González, A. 1988. Memoria Explicativa de la Hoja n° 784 (Ciudad Real) del Mapa Geológico de España E. 1:50.000 (Segunda Serie). Madrid: Instituto Geológico y Minero de España, 101 pp.Google Scholar
Prado, C. de, Verneuil, E. de & Barrande, J. 1855. Mémoire sur la Géologie d'Almaden, d'une partie de la Sierra Morena et des Montagnes de Tolède (C. de Prado), suivi d'une description des fossiles qui s'y rencontrent (E. de Verneuil et J. Barrande). Bulletin de la Société Géologique de France 12 (2), 182–204, 964–1025.Google Scholar
Robardet, M. & Gutiérrez-Marco, J. C. 2002. Silurian. In The geology of Spain (eds Gibbons, W. & Moreno, T.), pp. 51–66. London: Geological Society.Google Scholar
Sarmiento, G. & García Palacios, A. 1996. Conodontos silúricos (Telychiense–Sheinwoodiense) en las facies sapropelíticas negras de Corral de Calatrava (Ciudad Real), España. In Comunicaciones XII Jornadas de Paleontología (eds Palacios, T. & Gozalo, R.), pp. 109–11. Badajoz.Google Scholar
Schauer, M. 1971. Biostratigraphie und Taxonomie der Graptolithen des tieferen Silurs unter besonderer Berücksichtigung der tektonischen Deformation. Freiberger Forschungshefte (C) Paläontologie 273, 1–185.Google Scholar
Štorch, P. 1994 a. Graptolite biostratigraphy of the Lower Silurian (Llandovery and Wenlock) of Bohemia. Geological Journal 29, 137–65.CrossRefGoogle Scholar
Štorch, P. 1994 b. Llandovery–Wenlock boundary beds in the graptolite-rich sequence of the Barrandian area (Bohemia). Journal of the Czech Geological Society 39, 163–82.Google Scholar
Štorch, P. 1998. New data on Telychian (Upper Llandovery, Silurian) graptolites from Spain. Journal of the Czech Geological Society 43, 113–41.Google Scholar
Štorch, P., Gutiérrez-Marco, J. C., Sarmiento, G. N. & Rábano, I. 1998. Upper Ordovician and Lower Silurian of Corral de Calatrava, southern part of the Central Iberian Zone. Temas Geológico-Mineros ITGE 23, 319–25.Google Scholar
Zhang, S., Barnes, C. R. & Jowett, D. M. S. 2006. The paradox of the global standard Late Ordovician–Early Silurian sea level curve: evidence from conodont community analysis from both Canadian Arctic and Appalachian margins. Palaeogeography, Palaeoclimatology, Palaeoecology 236, 246–71.Google Scholar