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1-20 OF 32 RESULTS FOR
Lochkov Formation
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Journal Article
Siluro-Devonian Boundary in North America
J. M BERDAN, W. B. N BERRY, A. J BOUCOT, G. A COOPER, D. E JACKSON, J. G JOHNSON, GILBERT KLAPPER, A. C LENZ, ANDERS MARTINSSON, W. A OLIVER, JR., L. V RICKARD, R THORSTEINSSON
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 November 1969
GSA Bulletin (1969) 80 (11): 2165–2174.
... and by the incoming of terebratulids, Cyrtina, and common Schizophoria. Insofar as the Pridoli-Lochkov boundary in Bohemia can be revised to correspond to this boundary, the Pridoli is recognized as the uppermost Silurian Stage. In North America, the base of the Devonian, defined as the base of the Gedinnian...
Journal Article
THE SILURIAN-DEVONIAN BOUNDARY IN THE BARRANDIAN
Publisher: Canadian Society of Petroleum Geologists
Published: 01 March 1972
Bulletin of Canadian Petroleum Geology (1972) 20 (1): 104–174.
... . On the basis of graptolites, therefore, the Lochkov For- mation (Barrande's "f t bande") was reassigned to the Silurian. This interpretation (except for the uppermost part of the Lochkov Formation ) was adopted by Kettner and Kodym, who revised Barrandian stratigraph y (1919) and remapped this Early Paleozoic...
Journal Article
Systematics of the Koneprusiine Trilobites, with new Taxa from the Silurian and Devonian of Laurentia
Journal: Journal of Paleontology
Publisher: Paleontological Society
Published: 01 July 2008
Journal of Paleontology (2008) 82 (4): 657–675.
..., 1987 , pl. 1, fig. 3); calcareous. adaemona Vaněk , Vokáč, and Hörbinger , 1992; Koneprusia ( Koneprusia ); Lochkov Formation, upper layers (Lochkovian), Praha 5-Lochkov, cutting of the new road to Slivenec, Prague Basin, Bohemia, Czech Republic; Koneprusia ( Koneprusia ): Vaněk...
Journal Article
PROBLEMATIC PHOSPHATIC PLATES FROM THE SILURIAN–EARLY DEVONIAN OF BOHEMIA, CZECH REPUBLIC
Journal: Journal of Paleontology
Publisher: Paleontological Society
Published: 01 September 2006
Journal of Paleontology (2006) 80 (5): 1026–1031.
... part of the succeeding Lower Devonian Lochkov Formation (U Topolů bed 14; Fig. 2 ) ( Chlupáč et al., 1972 ). In the Early Devonian, crinoidal limestones, calciturbidites, nodular, and also reefal types gained prevalence. Figure 1 —Outcrop of Silurian rocks in Bohemia, showing sample...
Journal Article
FIRST OCCURRENCE OF ORTHOTHECA NOVÁK, 1886 (HYOLITHA, EARLY DEVONIAN) IN NORTH AMERICA
Journal: Journal of Paleontology
Publisher: Paleontological Society
Published: 01 July 2009
Journal of Paleontology (2009) 83 (4): 588–596.
... above), to confirm identifications as representatives of Orthotheca ; the range minimally is Lochkovian – Emsian (Lower Devonian); Europe and North America. This genus was proposed by Novák (1886) in a taxonomic work on the fauna of the Devonian Lochkov Formation, Lochkovian Stage ( = etage...
Journal Article
Chemical processing of fossil phyllocarid cuticle: a comparison of micro- and macrofossil remains
Journal: Palynology
Publisher: AASP -The Palynological Society
Published: 08 April 2024
Palynology (2024) 48 (2): 2267642.
... whether the rare material of C. decipiens originates from the underlying Kopanina Formation or the Požáry Formation. Similarly, the rare A. inclyta could have come from the overlying Lochkov Formation (see Chlupáč 1994 ). The material from the Šárka and Požáry formations can be assigned...
Series: Geological Society, London, Special Publications
Publisher: Geological Society of London
Published: 01 January 2016
DOI: 10.1144/SP423.1
EISBN: 9781862399556
... ; Koptíková et al. 2010 ; Vacek 2011 ). MS values across the Lochkov and Praha formations show a strong positive shift from below 1 up to c. 20 m 3 kg −1 ×10 −9 shortly after the Lochkovian/Pragian boundary, with a second maximum of c. 30 m 3 kg −1 ×10 −9 in the upper third of the Pragian...
Abstract Distinctive facies change and magnetic susceptibility across the neritic Rauchkofel Limestone (Central Carnic Alps) document specific sea-level fluctuations that are related to the Lochkov–Prag Event. This is supported by a positive shift in the carbon isotope signal of about 1.5‰ and a distinct decline in conodont biodiversity during the late Lochkovian. A transgressive interval during the late Lochkovian is followed by a regressive phase indicated by an eye-catching megaclast horizon of early Pragian age. Some of the boulders within that horizon reach up to 10 m in diameter. A model explaining regional depositional patterns is provided.
Journal Article
Geological map and stratigraphic evolution of the central sector of the Carnic Alps (Austria-Italy)
Monica Pondrelli, Carlo Corradini, Claudia Spalletta, Luca Simonetto, Maria Cristina Perri, Maria G. Corriga, Corrado Venturini, Hans Peter Schönlaub
Journal: Italian Journal of Geosciences
Publisher: Societa Geologica Italiana
Published: 01 October 2020
Italian Journal of Geosciences (2020) 139 (3): 469–484.
... an area of about 10 km 2 at 1:5000 through standard field techniques. In the Italian part of the study area (Regione Autonoma Friuli Venezia Giulia), the cartographic base consists of the 1:5000 Regional Topographic Maps (Tavolette della Carta Regionale Numerica) freely provided in digital format...
Journal Article
LOWER DEVONIAN STRATIGRAPHY AND CORRELATION, NORTHERN SIMPSON PARK RANGE, NEVADA
Publisher: Canadian Society of Petroleum Geologists
Published: 01 September 1965
Bulletin of Canadian Petroleum Geology (1965) 13 (3): 365–381.
...J. G. Johnson ABSTRACT The Paleozoic section at Windmill Window along the northern front of the Simpson Park Range consists almost wholly of carbonate rocks ranging in age from Late Ordovician to Middle Devonian and includes the following formations listed in ascending order: Hanson Creek Formation...
Journal Article
Correlation for the Lower Palaeozoic
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 14 September 2009
Geological Magazine (2010) 147 (2): 171–180.
... at 8 m above the base of the Lochkov Formation within the classic Barrandian sequence at Klonk, near Prague, Czech Republic, and at the base of the uniformis graptolite Biozone. A more recent borehole drilled across the boundary has documented further the graptolite and sedimentological data (Chlupàč...
Journal Article
Lochkovian (Lower Devonian) marine-deposits from the Rio Malinfier West section (Carnic Alps, Italy)
Carlo Corradini, Maria G. Corriga, Monica Pondrelli, Paolo Serventi, Luca Simonetto, Annalisa Ferretti
Journal: Italian Journal of Geosciences
Publisher: Societa Geologica Italiana
Published: 01 June 2019
Italian Journal of Geosciences (2019) 138 (2): 153–170.
... of about 100 m comprises five lithostratigraphic units (Alticola, Rauchkofel, Nölbling, La Valute and Findenig formations) spanning in age from the latest Silurian to the Early Devonian. The complex structural setting of the section results from a main fault dividing the succession in two separate segments...
Journal Article
An oceanic model for lithological and faunal changes tested on the Silurian record
Journal: Journal of the Geological Society
Publisher: Geological Society of London
Published: 01 August 1990
Journal of the Geological Society (1990) 147 (4): 663–674.
..., diversity and extinction rate of planktic and benthic faunas. Sedimentary changes involve fluctuations in the rate of clay deposition and carbonate production, the advance and retreat of carbonate deposition on the shelf edge, the timing of oolite, reef, and black shale formation, and changes between oxic...
Journal Article
REEF-DWELLING GYPIDULOID BRACHIOPODS IN THE LOWER SILURIAN ATTAWAPISKAT FORMATION, HUDSON BAY REGION
Journal: Journal of Paleontology
Publisher: Paleontological Society
Published: 01 January 2005
Journal of Paleontology (2005) 79 (1): 48–62.
... with basolaterally divergent inner hinge plates, lacking fold or sulcus, possible junior synonym of Clorinda rotunda Lindström, 1861 ). Pentamerus sphaerulites Barrande, 1879 , Kopanina Formation, Ludlow, Prague Basin, Bohemia. Pentamerus pelagicus Barrande, 1847 , Lochkov Formation, Bohemia...
Journal Article
Lower Devonian ostracods from the Istanbul area, Western Pontides (NW Turkey): Gondwanan and peri-Gondwanan affinities
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 04 August 2014
Geological Magazine (2015) 152 (2): 298–315.
... pro Mineralogii a Geologii
33 , 131 –47.
Přibyl
A.
1990 . Early Devonian Ostracoda from the upper part of the
Lochkov Formation of central Bohemia . Časopis pro Mineralogii a
Geologii
35 , 355...
Journal Article
A lifetime of the Variscan orogenic plateau from uplift to collapse as recorded by the Prague Basin, Bohemian Massif
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 10 November 2017
Geological Magazine (2019) 156 (3): 485–509.
... only locally more complicated within the lowermost Devonian Lochkov Formation ( Fig. 9 ). This stratigraphical unit consists of c. 10–20 cm thick limestone beds alternating with calcareous shale interbeds of approximately the same thickness, which facilitated bedding-parallel slip and thus folding...
Journal Article
Cosmopolitan myodocope ostracods from the Silurian of Uzbekistan, Central Asia
Elena Mikhailova, Vincent Perrier, Mark Williams, David J. Siveter, Anna Tarasenko, Firuza Salimova, Irina A. Kim
Publisher: Société Géologique de France
Published: 04 November 2020
Bulletin de la Société Géologique de France (2020) 191 (1): 32.
.... 27 and 28; Perrier et al. , 2011 : pl. 1, fig. 2. Type locality. – Lochkov suburb of Prague, Czech Republic. Type horizon. – Požáry Formation, Pridoli Series, stratigraphical division e2 of Barrande, 1872 ( Kříž, 1992 ). Material. – Twelve valves from the outcrop at Kanda...
Journal Article
Ti–Zr–Nb-bearing accessory minerals in high-K trachyandesitic rocks from the Western Outer Carpathians, Moravia, Czech Republic
Journal: European Journal of Mineralogy
Publisher: GeoScienceWorld Journals
Published: 01 January 2018
European Journal of Mineralogy (2018) 30 (1): 135–147.
... O, and at temperatures around 840 °C. Zirconolite was stabilized relative to zircon by the Ti–Ca-rich nature of the melts and to baddeleyite by the high SiO 2 activity. Formation of Zr-bearing titanite, as recorded in other potassic suites, was precluded by the preferential entry of Ti into the CGM...
Includes: Supplemental Content
Journal Article
The graptolite, conodont and sedimentary record through the late Ludlow Kozlowskii Event (Silurian) in the shale-dominated succession of Bohemia
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 06 October 2011
Geological Magazine (2012) 149 (3): 507–531.
... . ultimus at the Lochkov locality. Cr. intercostatus and C. hawlei form part of the distinct Denckmanites–Cromus trilobite Assemblage established by Chlupáč ( 1987 ). This assemblage is known only from a few sections near Lochkov village where it is restricted to a single thin bed. Šnajdr ( 1985...
Journal Article
Origin and evolution of lower Paleozoic reefs in the Pechora Urals, Russia
Publisher: Canadian Society of Petroleum Geologists
Published: 01 June 1999
Bulletin of Canadian Petroleum Geology (1999) 47 (2): 85–103.
... Formation (Fig. 3; Antoshkina et al., 1989; Antoshkina, 1996a) and overlain by the upper Emsian, deep-water limestone and shale of the Vyazov Formation (Fig. 3; Pershina, et al., 1971). Although the shelf-margin reef facies were probably laterally extensive, it is exposed only in some areas, including...
Journal Article
A graptolite-rich Ordovician–Silurian boundary section in the south-central Pyrenees, Spain: stratigraphical and palaeobiogeographical significance
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 29 June 2018
Geological Magazine (2019) 156 (6): 1069–1091.
... section comprises the uppermost part of the quartzite-dominated Bar Formation and overlying black shales of late Hirnantian and early Rhuddanian age, which have been dated by graptolites to the upper Metabolograptus persculptus and lower–middle Akidograptus ascensus–Parakidograptus acuminatus biozones...
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