Conodont biostratigraphy in the Early to Middle Ordovician strata of the Oslobreen Group in Ny Friesland, Svalbard

Lehnert, Oliver; Stouge, Svend; Brandl, Philipp A.

doi:10.1127/1860-1804/2013/0003

Cited by 23 publications

(17 citation statements)

References 18 publications

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“…However, this and more recent tectonic events appear to have had minimal thermal overprinting effects on the northern Ny Friesland succession (Fairchild et al., ). Thermal estimates of the Ordovician‐aged strata indicate immature to early mature organic material from conodonts with CAI 1 (Lehnert, Stouge, & Brandl, ). Fine‐scale observations suggest early alteration of the samples during shallow burial (Knoll et al., ; Knoll, Fairchild, & Swett, ; Fairchild et al., ).…”

Section: Methodsmentioning

confidence: 99%

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Environmental insights from high‐resolution (SIMS) sulfur isotope analyses of sulfides in Proterozoic microbialites with diverse mat textures

et al. 2017

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Section: Methodsmentioning

confidence: 99%

“…However, this and more recent tectonic events appear to have had minimal thermal overprinting effects on the northern Ny Friesland succession (Fairchild et al, 2016). Thermal estimates of the Ordovician-aged strata indicate immature to early mature organic material from conodonts with CAI 1 (Lehnert, Stouge, & Brandl, 2013).…”

Section: Geological Settingmentioning

confidence: 99%

Environmental insights from high‐resolution (SIMS) sulfur isotope analyses of sulfides in Proterozoic microbialites with diverse mat textures

et al. 2017

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“…En la región Báltica se puede correlacionar con la parte superior de la Zona de O. evae (Lindström, 1971) y con la Zona de Microzarkodina sp. A de Bagnoli y Stouge (1997) y en el archipiélago de Svalbard, Lehnert et al (2013) estudian la bioestratigrafía del Grupo Oslobreen, Formación Valhallfonna, registrando la Zona de Oepikodus intermedius, que se correlacionaría con la Zona de O. intermedius y la base de la Zona de Baltoniodus triangularis-Tripodus laevis identificadas en el presente trabajo.…”

Section: Zona De Oepikodus Intermediusunclassified

“…triangularis y Microzarkodina flabellum de Bagnoli y Stouge (1997), y con la Zona de Baltoniodus triangularis de Lindström (1971), Löfgren (1978) y Tolmacheva (2001). Lehnert et al (2013) estudian la bioestratigrafía del Grupo Oslobreen, Formación Valhallfonna, del archipiélago de Svalbard, registrando la Zona de Oepikodus intermedius, cuya parte superior se correlacionaría con la base de la Zona de Baltoniodus triangularis-Tripodus laevis del presente trabajo; además registran, en parte de la Formación Valhahhfonna, la Zona de Periodon aff. flabellum, cuyo tramo inferior se correlacionaría con el tramo superior de la Zona de Baltoniodus triangularis-Tripodus laevis.…”

Section: Zona De Baltoniodus Triangularis-tripodus Laevisunclassified

Bioestratigrafía y provincialismo de conodontes del tramo medio-superior de la Formación San Juan en el cerro Viejo de Huaco, Precordillera, Argentina

Mango¹,

Albanesi²

2018

andgeo

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The present study deals with the conodont biostratigraphy from the middle and upper parts of the San Juan Formation (Lower-Middle Ordovician) exposed at the Los Gatos creek section, west of the cerro Viejo de Huaco, Central Precordillera of San Juan Province. The numerous conodonts recovered, corresponding to 55 species, allow to recognize a series of biozones in the studied section. The biostratigraphic analysis carried out herein allows determining associations of conodonts assignable to the Oepikodus evae, Oepikodus intermedius, Baltoniodus triangularis-Tripodus laevis and Lenodus variabilis zones that correspond to the middle Floian to lower Darriwilian. The Baltoniodus navis and Microzarkodina parva zones were not identified due to insufficient information provided by this stratigraphic section. In general, the levels corresponding to the Baltoniodus triangularis-Tripodus laevis Zone contain more conodonts, than the records of other localities from Precordillera. These specimens are well preserved with a color alteration index (CAI) of 2-2.5, indicating overburden paleotemperatures ranging from 60° and 155° C. The large presence of fragmented conodonts, with recrystallized surfaces and crystal overgrowth, could indicate the effect of distinctive diagenetic fossil processes on the bearer limestone. The analysis of the diversity and abundance of genera and species of conodonts by chronostratigraphic intervals presents a great percentage of cosmopolitan taxa, 18% and 38% in common, at species level, only with the North-American Midcontinent Province (NAMP), and with a small percentage with the North-Atlantic Province (NAP) and the Precordillera, which allows to approximate a greater paleobiogeographic affinity of the conodonts recovered with those of the NAMP than those of the NAP for the entire interval studied. On the other hand, the Precordillera is verified as a province with its own characteristics as identified by several authors.

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“…Smith et al 1989;Armstrong 1990;Smith 1991) and Svalbard (e.g. Lehnert et al 2013) have been subjected to recent investigations.…”

Section: Rhodesognathus Elegansmentioning

confidence: 99%

Conodonts in Ordovician biostratigraphy

Bergström

Ferretti

2017

LET

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The long time interval after Pander's (1856) original conodont study can in terms of Ordovician conodont biostratigraphical research be subdivided into three periods, namely the Pioneer Period (1856-1955), the Transition Period (1955-1971) and the Modern Period (1971-Recent). During the pre-1920s, the few published conodont investigations were restricted to Europe and North America and were not concerned about the potential use of conodonts as guide fossils. Although primarily of taxonomic nature, the pioneer studies by Branson & Mehl, Stauffer and Furnish during the 1930s represent the beginning of the use of conodonts in Ordovician biostratigraphy. However, no formal zones were introduced until Lindström (1955) proposed four conodont zones in the Lower Ordovician of Sweden, which marks the end of the Pioneer Period. Because Lindström's zone classification was not followed by similar work outside Baltoscandia, the time interval up to the late 1960s can be regarded as a Transition Period. A milestone symposium volume, entitled 'Symposium on Conodont Biostratigraphy' and published in 1971, summarized much new information on Ordovician conodont biostratigraphy and is taken as the beginning of the Modern Period of Ordovician conodont biostratigraphy. In this volume, the Baltoscandic Ordovician was subdivided into named conodont zones, whereas the North American Ordovician succession was classified into a series of lettered or numbered faunas. Although most of the latter did not receive zone names until 1984, this classification has been used widely in North America. The Middle and Upper Ordovician Baltoscandic zone classification, which was largely based on evolutionary species changes in lineages and hence includes phylozones, has subsequently undergone only minor changes and has been used slightly modified also in some other regions, such as New Zealand, China and eastern North America. The great importance of conodonts in Ordovician biostratigraphy is shown by the fact that conodonts are used for the definition of two of the seven global stages, and seven of the 20 stage slices, now recognized within this system

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Conodont biostratigraphy in the Early to Middle Ordovician strata of the Oslobreen Group in Ny Friesland, Svalbard

Cited by 23 publications

References 18 publications

Environmental insights from high‐resolution (SIMS) sulfur isotope analyses of sulfides in Proterozoic microbialites with diverse mat textures

Environmental insights from high‐resolution (SIMS) sulfur isotope analyses of sulfides in Proterozoic microbialites with diverse mat textures

Bioestratigrafía y provincialismo de conodontes del tramo medio-superior de la Formación San Juan en el cerro Viejo de Huaco, Precordillera, Argentina

Conodonts in Ordovician biostratigraphy

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