Ordovician Conodonts From the Satun Area, Southern Peninsular Thailand

Agematsu, Sachiko; Sashida, Katsuo; Salyapongse, Sirot; Sardsud, Apsorn

doi:10.1666/0022-3360(2007)81[19:ocftsa]2.0.co;2

Cited by 25 publications

(14 citation statements)

References 26 publications

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“…This zone correlates with equivalent strata in Newfoundland , the Marathon basin, Texas (Bergström, 1978), strata in the Great Basin and Rocky Mountains (Harris et al, 1979), Poland (Dzik, 1994), Sweden (Bergström, 1971(Bergström, , 2007, northwestern China (Zhen et al, 2011a), Thailand (Agematsu et al, 2007), Kazakhstan , and New South Wales in Australia (Zhen et al, 2003).…”

Section: Regional and Global Correlationmentioning

confidence: 80%

Conodont biostratigraphy and global correlation of the middle Darriwilian-lower Sandbian (Ordovician) Las Aguaditas Formation, Precordillera of San Juan, Argentina

Feltes

Albanesi

Bergström

2016

andgeo

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ABSTRACT. Middle Darriwilian to lower Sandbian conodonts were recorded from the Las Aguaditas Formation at its type section in the Argentine Precordillera. A total of 9,974 conodont specimens were recovered from 46 carbonate samples, which represent 68 species of 38 genera. A biostratigraphic study verified a middle Darriwilian age for the interval spanning the contact between the San Juan and the Las Aguaditas formations. The following zones are determined in the study section: the Lenodus variabilis Zone, with the Periodon gladysae and Paroistodus horridus subzones following the Precordilleran scheme; the L. variabilis, Yangtzeplacognathus crassus, and the Eoplacognathus pseudoplanus zones with the Microzarkodina hagetiana and M. ozarkodella subzones, and the Pygodus anserinus Zone, according to the Scandinavian scheme; the Periodon macrodentatus Zone, with the Histiodella sinuosa, H. holodentata and H. cf. holodentata subzones, and the P. zgierzensis Zone with the H. kristinae Subzone that correlates the North American scheme. A stratigraphic gap was recognized between the lower and middle members of the Las Aguaditas Formation. It comprises the Eoplacognathus suecicus and Pygodus serra zones, and the lower subzone of the Pygodus anserinus Zone. The variation of conodont diversity through the study section conforms to shallowing and deepening patterns, which accompanies the changes of the provenance lithology. Three conodont assemblages were quantitatively recognized: a) Diverse conodont association, b) Low diversity conodont association and c) Recovery phase association. We propose to use the North American biozonal scheme of conodonts for the Central Precordillera because of the affinity of documented index taxa, which provides a more accurate intercontinental correlation for the global Middle Ordovician Series. Keywords: Conodont, Darriwilian-Sandbian, Biostratigraphy, Paleoecology, Precordillera, Argentina. RESUMEN. Bioestratigrafía de conodontes y correlación global del Darriwiliano medio-Sandbiano inferior (Ordovícico) Formación Las Aguaditas, precordillera de San Juan, Argentina. En la Formación Las Aguaditas, en su sección tipo en la precordillera Argentina, se registraron conodontes del Darriwiliano medio al Sandbiano bajo. Se recuperaron un total de 9.974 especímenes de 46 muestras carbonáticas; estos representan 68 especies pertenecientes a 38 géneros. Se llevó a cabo un estudio bioestratigráfico para verificar la edad del intervalo que incluye el contacto entra las formaciones San Juan y Las Aguaditas. La presencia de taxones guía indican una edad darriwiliana media para este intervalo. Las siguientes biozonas fueron determinadas en el área de estudio: Zona de Lenodus variabilis, con las subzonas de Periodon gladysae y Paroistodus horridus, correspondientes al esquema establecido para la precordillera; las zonas de L. variabilis, Yangtzeplacognathus crassus y la de Eoplacognathus pseudoplanus con la subzonas de Microzarkodina hagetiana y M. ozarkodella, y la Zona de Pygodus anserinus, según el ...

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Section: Regional and Global Correlationmentioning

confidence: 80%

Conodont biostratigraphy and global correlation of the middle Darriwilian-lower Sandbian (Ordovician) Las Aguaditas Formation, Precordillera of San Juan, Argentina

Feltes

Albanesi

Bergström

2016

andgeo

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“…Furthermore, the P. anserinus Biozone has been documented from the North China Craton (Jing et al, ; Z. H. Wang et al, ), the Precordillera of Argentina (Albanesi et al, ; Albanesi & Ortega, ； Feltes et al, ; Feltes, Serra, Ortega, & Albanesi, ; Heredia & Rosales, ; Lehnert, Bergström, Keller, & Bordonaro, ; Serra et al, ; Figure ), Newfoundland (Bergström, Riva, & Kay, ), North America (Bergström, ; Harris, Bergström, Ethington, & Ross, ), Kazakhstan (Tolmacheva, Degtyarev, Ryazantsev, & Nikitina, ), and Southern Asia (Agematsu, Sashida, Salyapongse, & Sardsud, ).…”

Section: Conodont Biostratigraphy and Correlationmentioning

confidence: 99%

Biostratigraphy and palaeoecology of Middle and Late Ordovician conodonts from the Hulo and Yenwashan formations, western Zhejiang, south‐eastern China

Stouge

Zhang

et al. 2019

Geological Journal

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A total of 5,918 conodonts have been recovered from the upper Hulo Formation and the lower Yenwashan Formation in the Hengdu section, Jiangshan County, Zhejiang Province, south‐eastern China, spanning the interval from the middle Darriwilian to the early Sandbian. Thirty‐three species, belonging to 24 genera, have been identified with three biozones (i.e., the Dzikodus tablepointensis Biozone, the Histiodella kristinae Biozone, and the Pygodus anserinus Biozone) recognized in the region. Using multivariate analysis, the Periodon–Protopanderodus biofacies is recorded from the upper Hulo Formation, and the Periodon–Pygodus biofacies and the Protopanderodus–Baltoniodus biofacies are recorded from the lower Yenwashan Formation. The Periodon–Protopanderodus biofacies and the Periodon–Pygodus biofacies represent a deep‐water environment, such as the margin of the platform and/or slope environment, deeper than that of the Protopanderodus–Baltoniodus biofacies.

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“…In North America, it has been identified in the eastern part of the Appalachians and from Alabama to Virginia (Bergström, ), in the Marathon basin, Texas (Bergström, ), in the Great Basin and Rocky Mountains (Harris, Bergström, Ethington, & Ross, ), and in Newfoundland (Bergström, Riva, & Kay, ). It is also present in Poland (Dzik, ), in Baltoscandia (Bergström, , ; Löfgren, ; Pålsson, Månsson, & Bergström, ), in the Polyakovka Formation in the South Urals (Dubinina & Ryazantsev, ), south and northwestern China (An, ; Jing, Zhou, & Wang, ; Zhen et al, ), Thailand (Agematsu, Sashida, Salyapongse, & Sardsud, ), Kazakhstan (Tolmacheva, Degtyarev, Ryazantsev, & Nikitina, ), and New South Wales in Australia (Zhen, Percival, & Webby, ).…”

Section: Conodont Biostratigraphymentioning

confidence: 99%

Graptolite and conodont faunas of Upper Ordovician (Sandbian) successions of the Argentine Precordillera: Biostratigraphic implications

et al. 2018

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Graptolites and conodonts are frequent fossils in Sandbian (Late Ordovician) outcrops of the Argentine Precordillera, where they present continuous and abundant records that enable detailed biostratigraphic studies. This work deals with the integration of previously available information on early Sandbian graptolites and conodonts, together with new paleontological data from the Las Aguaditas Creek (middle and upper members of the Las Aguaditas Formation), Las Chacritas River (Las Aguaditas Formation), and Cerro La Chilca (Los Azules Formation) sections from the Central Precordillera of the San Juan Province. The presence of the key graptolite Nemagraptus gracilis and the associated graptolite taxa allow for the documentation of the N. gracilis Zone. Specimens of N. gracilis and key conodont species, such as Pygodus anserinus coexist, along with a rich conodont fauna including Baltoniodus variabilis, whose range straddles the boundary between the Pygodus anserinus and the Amorphognathus tvaerensis zones. Detailed biostratigraphic ranges of the rich graptolite and conodont associations documented in the three study areas are provided. These records and an accurate taxonomic review allow a thorough description of the recognized zones. The use of conodont and graptolite zones from different areas of the Precordillera enables the verification of a diachronous contact, representing a hiatus that spans the middle to upper Darriwilian. Moreover, a brief taxonomic description of the identified graptolite species is provided.

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Ordovician Conodonts From the Satun Area, Southern Peninsular Thailand

Cited by 25 publications

References 26 publications

Conodont biostratigraphy and global correlation of the middle Darriwilian-lower Sandbian (Ordovician) Las Aguaditas Formation, Precordillera of San Juan, Argentina

Conodont biostratigraphy and global correlation of the middle Darriwilian-lower Sandbian (Ordovician) Las Aguaditas Formation, Precordillera of San Juan, Argentina

Biostratigraphy and palaeoecology of Middle and Late Ordovician conodonts from the Hulo and Yenwashan formations, western Zhejiang, south‐eastern China

Graptolite and conodont faunas of Upper Ordovician (Sandbian) successions of the Argentine Precordillera: Biostratigraphic implications

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