ANNULATA EVENT Z PROFILU V JÁMOVÉM LŮMKU U OCHOZI U BRNA – POZNÁMKY KE KONODONTOVÉ BIOSTRATIGRAFII (FAMEN, MORAVSKÝ KRAS)

Tomáš Weiner; Jiří Kalvoda

doi:10.5817/GVMS2013-1-2-141

Annulata event from a pit-quarry near Ochoz u Brna – remarks on conodont biostratigraphy (Famennian, Moravian Karst)

Vol.20,No.1-2(2013)

Tomáš Weiner Jiří Kalvoda

https://doi.org/10.5817/GVMS2013-1-2-141

PDF (Czech)

Abstract

About two meters thick section of the Famennian Křtiny Limestones (Líšeň Formation) was studied in a small pit-quarry near the road leading from Brno-Líšeň to Ochoz u Brna. Conodont samples were taken from seven diff erent stratigraphical levels. A richly fossiliferous interval (about 40 cm thick) can be distinguished in the higher part of the section. This interval is characterized by abundant occurence of clymenids, bivalves, orthocone nautiloids, trilobites and other groups. Black limestone lenses (maximal thickness about 10 cm) are developed in the lowermost part of the richly fossiliferous interval. A presence of Palmatolepis glabra lepta (late morphotype), Palmatolepis minuta minuta and Palmatolepis rugosa trachytera suggests these black limestones probably represent the Lower Annulata event (Upper Palmatolepis rugosa trachytera zone). Polygnathus styriacus indicating the base of the Palmatolepis perlobata postera zone enters within about 10 centimeters thick interval of dark grey biodetritic limestones which occur closely above the black limestone lenses. The Upper Annulata event and equivalents of „Wagnerbank“ or „Annulata limestone“ were not distinguished in the studied section. This might be caused by condensed sedimentation. Grey limestones and marly limestones belonging to the higher part of the richly fossiliferous interval are placed above the base of the Palmatolepis perlobata postera zone. The studied locality might correspond to the original fossil site described by Rzehak in 1910.

Keywords:
Moravian Karst; Famennian; Annulata event; Líšeň Formation; conodont biostratigraphy

References

Becker, R. T. – House, M. R. (2000): Devonian ammonoid zones and their correlation with established series and stage boundaries. - Courier Forschungsinstitut Senckenberg, 220, 113–151.

Clausen, C.-D. – Korn, D. (2008): Hoheres Mitteldevon und Oberdevon des nördlichen Rheinischen Schiefergebirges (mit Velberter Sattel und Kellerwald). – In: Deutsche Stratigraphische Kommision: Stratigraphie von Deutschland VIII. Devon. – Schrift enreihe der Deutschen Gesellschaft für Geowissenschaft en, 52, 439–481.

Dvořák, J. – Friáková, O. – Kullmann, J. (1988): Influence of Volcanism on Upper Devonian Black Limestone and Shale Deposition, Czechoslovakia. – In: McMillan, N. J. – Embry, A. F. – Glass, D. J. (eds): Devonian of the World. – Canadian Society of Petroleum Geologists, Memoir, 14, 2, 393–398.

Hartenfels, S. (2011): Die globalen Annulata-Events und die Dasberg-Krise (Famennium, Oberdevon) in Europa und Nord-Afrika – hochaufl ösende Conodonten-Stratigraphie, Karbonat-Mikrofazies, Paläoökologie und Paläodiversität. – Münstersche Forschungen zur Geologie und Paläontologie, 105, 17–527.

House, M. R. (2002): Strength, timing, setting and cause of mid-Palaeozoic extinctions. – Palaeogeography, Palaeoclimatology, Palaeoecology, 181, 5–25. https://doi.org/10.1016/S0031-0182%2801%2900471-0">https://doi.org/10.1016/S0031-0182(01)00471-0

Chlupáč, I. (1966): Nové nálezy klymenií ve svrchním devonu Moravského krasu. – Věstník Ústředního ústavu geologického, 41, 93–98.

Joachimski, M. M. – Breisig, S. – Buggisch, W. – Talent, J. A. – Mawson, R. – Gereke, M. – Morrow, J. R. – Day, J. – Weddige, K. (2009): Devonian climate and reef evolution: insights from oxygen isotopes in apatite. Earth and Planetary Science Letters, 284, 3–4, 599–609. https://doi.org/10.1016/j.epsl.2009.05.028">https://doi.org/10.1016/j.epsl.2009.05.028

Korn, D. (2004): Th e mid-Famennian ammonoid succession in the Rhenish Mountains: the “annulata Event” reconsidered. – Geological Quarterly, 48, 245–252.

Korn, D. – Ziegler, W. (2002): Th e ammonoid and conodont zonation at Enkenberg (Famennian, Late Devonian; Rhenish Mountains). – Senckenbergiana lethaea, 82, 2, 453–462. https://doi.org/10.1007/BF03042947">https://doi.org/10.1007/BF03042947

Raczka, M. – Marynowski, L. – Filipiak, P. – Sobstel, M. – Pisarzowska, A. – Bond, D. P. G. (2010): Anoxic Annulata events in the Late Famennian of the Holy Cross Mountains (Southern Poland): Geochemical and palaeontological record. – Palaeogeography, Palaeoclimatology, Palaeoecology, 297, 549–575. https://doi.org/10.1016/j.palaeo.2010.08.028">https://doi.org/10.1016/j.palaeo.2010.08.028

Rzehak, A. (1910): Der Brüner Clymenienkalk. – Zeitschrift des Mährischen Landesmuseums, 10, 149–216.

Sandberg, C. A. – Morrow, J. R. – Ziegler, W. (2002): Late Devonian sea-level changes, catastrophic events, and mass extinctions. – In: Koeberl, C. – MacLeod, K. G. (eds): Catastrophic Events and Mass Extinctions: Impacts and Beyond. – Geological Society of America, Special Papers, 356, 473–487. https://doi.org/10.1130/0-8137-2356-6.473">https://doi.org/10.1130/0-8137-2356-6.473

Walliser, O. H. (1996): Global events in the Devonian and Carboniferous. – In: Walliser O. H. (ed.): Global Events and Event Stratigraphy, 225–250, Springer.

Ziegler, W. – Sandberg, C. A. (1984): Palmatolepis-based revision of upper part of standard Late Devonian conodont zonation. – In: Clark, D. L.: Conodont Biofacies and Provincialism. – Geological Society of America, Special Papers, 179–194.

Metrics