The Ordovician succession of the Taebaek Group (Korea) revisited: old conodont data, new perspectives, and implications

Cho, Se Hyun; Lee, Byung Su; Lee, Dong Jin; Choh, Suk Joo

doi:10.1007/s12303-020-0044-5

Cited by 13 publications

(7 citation statements)

References 34 publications

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Section: Biostratigraphy Paleobiogeography and Taphonomymentioning

confidence: 99%

“…Lee and Lee (1986) established the Eoplacognathus suecicus – Eoplacognathus jigunsanensis (conodont) Zone in the Jigunsan Formation (see also Lee and Lee, 1990; Lee and Seo, 2004). Cho et al (2021) established the two conodont biozones for the formation, the lower Tangshanodus tangshanensis Zone and the upper Eoplacognathus suecicus Zone. The boundary between the two zones is placed at the horizon where Eoplacognathus suecicus Bergström, 1971 first appears in the middle of the formation.…”

Section: Biostratigraphy Paleobiogeography and Taphonomymentioning

confidence: 99%

“…The boundary between the two zones is placed at the horizon where Eoplacognathus suecicus Bergström, 1971 first appears in the middle of the formation. The boundary between the two zones approximately corresponds to the lithologic boundary between the mainly clastic, lower part of the formation and the upper part, which commonly has limestone layers (Cho et al, 2021, fig. 2).…”

Section: Biostratigraphy Paleobiogeography and Taphonomymentioning

confidence: 99%

“…Lee and Lee (1986) and Lee and Lee (1990) reported conodonts from the formation and conducted a biostratigraphic study. Recently, Cho et al (2021) comprehensively compiled and revised conodont biostratigraphy of the Taebaek Group. Choi et al (2001) defined the Dolerobasilicus (trilobite) Zone for the Jigunsan Formation (see also Choi and Chough, 2005).…”

Section: Biostratigraphy Paleobiogeography and Taphonomymentioning

confidence: 99%

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The first Middle Ordovician and Gondwanan record of the cincinnaticrinid crinoidOhiocrinus byeongseonin. sp. from South Korea: biostratigraphy, paleobiogeography, and taphonomy

et al. 2022

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Ohiocrinus byeongseoni n. sp. from the Middle Ordovician (Darriwilian) Jigunsan Formation of South Korea in the Sino-Korean (North China) block is the oldest species of Ohiocrinus of the Cincinnaticrinidae and the first record outside Laurentia. O. byeongseoni is characterized by a loosely clockwise-coiled anal sac, isotomous branching throughout arms, long, slender xenomorphic column, and small lichenocrinid-type holdfast. The new species occurs in association with a deep-water siliciclastic environment, unlike the Laurentian species with a shallow-water carbonate environment. The monospecific crinoid assemblage is interpreted as parautochthonous, considering that the crinoids were reworked by relatively weak down-current probably caused by storm but preserved within the environment where they lived. The occurrence of O. byeongseoni presents a considerable spatiotemporal gap and ecologic disparity in evolution of Ohiocrinus and the Cincinnaticrinidae. UUID: http://zoobank.org/240417a4-8d33-4f45-aedb-afcc07f1ecbb

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Section: Biostratigraphy Paleobiogeography and Taphonomymentioning

confidence: 99%

Section: Biostratigraphy Paleobiogeography and Taphonomymentioning

confidence: 99%

Section: Biostratigraphy Paleobiogeography and Taphonomymentioning

confidence: 99%

Section: Biostratigraphy Paleobiogeography and Taphonomymentioning

confidence: 99%

See 2 more Smart Citations

The first Middle Ordovician and Gondwanan record of the cincinnaticrinid crinoidOhiocrinus byeongseonin. sp. from South Korea: biostratigraphy, paleobiogeography, and taphonomy

et al. 2022

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“…5). In the Taebaeksan Basin of Korea, A. koreanensis M. Lee et al, 2016, occurs in the Duwibong Formation (M. , which is mid-late middle Darriwilian (Cho et al, 2021). Thus, the paleogeographic range of Amsassia expanded in the Darriwilian to include the Sino-Korean Block (for paleogeographic map, see M. Lee et al, 2016, fig.…”

Section: Geologic History Of Amsassiamentioning

confidence: 99%

Amsassia(calcareous alga) from the Lower Ordovician (Tremadocian) of western Newfoundland, and the biologic affinity and geologic history of the genus

2021

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Modular coral-like fossils from Lower Ordovician (Tremadocian) thrombolitic mounds in the St. George Group of western Newfoundland were initially identified as Lichenaria and thought to include the earliest tabulate corals. They are here assigned to Amsassia terranovensis n. sp. and Amsassia? sp. A from the Watts Bight Formation, and A. diversa n. sp. and Amsassia? sp. B from the overlying Boat Harbour Formation. Amsassia terranovensis n. sp. and A. argentina from the Argentine Precordillera are the earliest representatives of the genus. Amsassia is considered to be a calcareous alga, possibly representing an extinct group of green algae. The genus originated and began to disperse in the Tremadocian, during the onset of the Great Ordovician Biodiversification Event, on the southern margin of Laurentia and the Cuyania Terrane. It inhabited small, shallow-marine reefal mounds constructed in association with microbes. The paleogeographic range of Amsassia expanded in the Middle Ordovician (Darriwilian) to include the Sino-Korean Block, as well as Laurentia, and its environmental range expanded to include non-reefal, open- and restricted-marine settings. Amsassia attained its greatest diversity and paleogeographic extent in the Late Ordovician (Sandbian–Katian), during the culmination of the Great Ordovician Biodiversification Event. Its range included the South China Block, Tarim Block, Kazakhstan, and Siberia, as well as the Sino-Korean Block and Laurentia, and its affinity for small microbial mounds continued during that time. In the latest Ordovician (Hirnantian), the diversity of Amsassia was reduced, its distribution was restricted to non-reefal environments in South China, and it finally disappeared during the end-Ordovician mass extinction. UUID: http://zoobank.org/ef0abb69-10a6-46de-8c78-d6ec7de185fe

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Confirmation of the Floian-Darriwilian (Lower to Middle Ordovician) hiatus in the Taebaek Group, Korea: integration of conodont biostratigraphy and sedimentology

et al. 2022

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The Ordovician succession of the Taebaek Group (Korea) revisited: old conodont data, new perspectives, and implications

Cited by 13 publications

References 34 publications

The first Middle Ordovician and Gondwanan record of the cincinnaticrinid crinoidOhiocrinus byeongseonin. sp. from South Korea: biostratigraphy, paleobiogeography, and taphonomy

The first Middle Ordovician and Gondwanan record of the cincinnaticrinid crinoidOhiocrinus byeongseonin. sp. from South Korea: biostratigraphy, paleobiogeography, and taphonomy

Amsassia(calcareous alga) from the Lower Ordovician (Tremadocian) of western Newfoundland, and the biologic affinity and geologic history of the genus

Confirmation of the Floian-Darriwilian (Lower to Middle Ordovician) hiatus in the Taebaek Group, Korea: integration of conodont biostratigraphy and sedimentology

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