Results 71 to 80 of about 1,858 (206)

New biostratigraphic and chemostratigraphic data from the Chicotte Formation (Llandovery, Anticosti Island, Laurentia) compared with the Viki core (Estonia, Baltica) [PDF]

open access: yesEstonian Journal of Earth Sciences, 2009
Due to the lack of biostratigraphically useful graptolites in the crinoidal and reefal Chicotte Formation on Anticosti Island (Québec, Canada), the precise chronostratigraphic position of the formation is not known. New stable carbon isotope and conodont
Munnecke, Axel, Männik, Peep
doaj  

Graptolites [PDF]

open access: yesGeological Magazine
Jan Zalasiewicz   +2 more
  +6 more sources

Correlation and biostratigraphy of the Kortrijk (Sint-Antonius) and Kortrijk (Lust) boreholes (early Silurian, Belgium)

open access: yesCarnets de Géologie, 2005
Since their drilling, respectively in 1961 and 1971, the 83W421 Kortrijk (Sint-Antonius) and 83W44 Kortrijk (Lust brewery) boreholes have been studied rather extensively for biostratigraphical information.
Wauthoz Bastien
doaj  

Graptolites of the Šárka Formation (Middle Ordovician, Prague Basin) and their stratigraphical significance [PDF]

open access: yes, 2018
Graptolites are one of the significant groups of stratigraphic index fossils in the Early Palaeozoic. They are used to determine the boundaries between bio- and chronostratigraphical units and to correlate them both on a regional and the global scale ...
Strossová, Zuzana
core  

Graptolites – stratigraphic tool in the exploration of zones prospective for the occurrence of unconventional hydrocarbon deposits [PDF]

open access: yes, 2013
In connection with the exploration of zones prospective for the occurrence of unconventional hydrocarbon deposits, numerous studies of source rocks have been conducted in Poland. Stratigraphic examinations are among the basic elements.
Podhalańska, T.
core   +1 more source

The world`s oldest crustoid graptolites from the Upper Tremadocian of Poland [PDF]

open access: yes, 2005
The Crustoidea are an order of sessile basic graptolites that are morphologically intermediate between the extant genus Rhabdopleura (Rhabdopleuroidea) and the extinct sessile order—the Dendroidea (Kozłowski 1962, 1966; Bulman 1970; Urbanek 1986). So far
Mierzejewski, P   +2 more
core  

High resolution conodont-graptolite biostratigraphy in the Middle-Upper Ordovician of the Sierra de La Invernada Formation (Central Precordillera, Argentina)

open access: yesGeologica Acta, 2009
Outcrops on the western slope of the La Invernada Range, San Juan Precordillera (W Argentina), were surveyed for lithofacial analysis and graptolite-conodont high resolution biostratigraphy.
G. ORTEGA   +3 more
doaj  

Little Known Homerian (Lower Silurian) Graptolites From Kosov Quarry Near Beroun, The Czech Republic

open access: yes, 2019
Štorch, Petr, Manda, Štěpán (2019): Little Known Homerian (Lower Silurian) Graptolites From Kosov Quarry Near Beroun, The Czech Republic.
Štorch, Petr, Manda, Štěpán
core   +1 more source

Silurian (Llandovery) monograptids from the Vargas Peña Formation (Paraná Basin, Eastern Paraguay)

open access: yesGeologica Acta, 2009
The Itacurubí Group is a siliciclastic Silurian sequence exposed in eastern Paraguay (Paraná Basin). It includes from bottom to top the Eusebio Ayala, Vargas Peña and Cariy formations.
N.J. URIZ   +2 more
doaj  

New late Tremadocian (Early Ordovician) conodont and graptolite records from the southern South American Gondwana margin (Eastern Cordillera, Argentina)

open access: yesGeologica Acta, 2009
New late Tremadocian (Early Ordovician) conodont and graptolite faunas from the eastern and central belts of the Eastern Cordillera (Jujuy Province, northwestern Argentina) are reported.
G.L. ALBANESI, G. ORTEGA
doaj  

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