Re-examination of a supposed ‘archaeocyath’ specimen from the Hyangsanni Formation, Okcheon Basin, Korea

Jin Han Ree; Suk Joo Choh; Haemyeong Jung; Dong Jin Lee

doi:10.1007/s12303-016-0023-z

Re-examination of a supposed ‘archaeocyath’ specimen from the Hyangsanni Formation, Okcheon Basin, Korea

Jin Han Ree, Suk Joo Choh, Haemyeong Jung, Dong Jin Lee

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

A supposed ‘archaeocyath’ specimen from the Hyangsanni Formation of the Okcheon Basin (Okcheon Metamorphic Belt), Korea, reported about 50 years ago, has previously been used to constrain the depositional age of the metasedimentary succession in the basin. However, a re-examination of the specimen reveals that it lacks the typical morphology of archaeocyaths. A detailed petrographic and microfabric analysis of the specimen, combined with a review of outcrop structures and microstructures of the dolomitic marble in the Hyangsanni Formation indicates that the supposed archaeocyath- like shape of the specimen was caused by deformations and metamorphic reactions. The Cambrian age of the Hyangsanni Formation should therefore be re-examined on the basis of unequivocal palaeontological evidence and/or radiometric dating.

Original language	English
Pages (from-to)	285-294
Number of pages	10
Journal	Geosciences Journal
Volume	20
Issue number	3
DOIs	https://doi.org/10.1007/s12303-016-0023-z
Publication status	Published - 2016 Jun 1

Bibliographical note

Publisher Copyright:
© 2016, The Association of Korean Geoscience Societies and Springer-Verlag Berlin Heidelberg.

Keywords

Archaeocyath
Hyangsanni Formation
Okcheon Basin
deformation
microfabrics

ASJC Scopus subject areas

General Environmental Science
General Earth and Planetary Sciences

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10.1007/s12303-016-0023-z

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title = "Re-examination of a supposed {\textquoteleft}archaeocyath{\textquoteright} specimen from the Hyangsanni Formation, Okcheon Basin, Korea",

abstract = "A supposed {\textquoteleft}archaeocyath{\textquoteright} specimen from the Hyangsanni Formation of the Okcheon Basin (Okcheon Metamorphic Belt), Korea, reported about 50 years ago, has previously been used to constrain the depositional age of the metasedimentary succession in the basin. However, a re-examination of the specimen reveals that it lacks the typical morphology of archaeocyaths. A detailed petrographic and microfabric analysis of the specimen, combined with a review of outcrop structures and microstructures of the dolomitic marble in the Hyangsanni Formation indicates that the supposed archaeocyath- like shape of the specimen was caused by deformations and metamorphic reactions. The Cambrian age of the Hyangsanni Formation should therefore be re-examined on the basis of unequivocal palaeontological evidence and/or radiometric dating.",

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AU - Ree, Jin Han

AU - Choh, Suk Joo

AU - Jung, Haemyeong

AU - Lee, Dong Jin

PY - 2016/6/1

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N2 - A supposed ‘archaeocyath’ specimen from the Hyangsanni Formation of the Okcheon Basin (Okcheon Metamorphic Belt), Korea, reported about 50 years ago, has previously been used to constrain the depositional age of the metasedimentary succession in the basin. However, a re-examination of the specimen reveals that it lacks the typical morphology of archaeocyaths. A detailed petrographic and microfabric analysis of the specimen, combined with a review of outcrop structures and microstructures of the dolomitic marble in the Hyangsanni Formation indicates that the supposed archaeocyath- like shape of the specimen was caused by deformations and metamorphic reactions. The Cambrian age of the Hyangsanni Formation should therefore be re-examined on the basis of unequivocal palaeontological evidence and/or radiometric dating.

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KW - Hyangsanni Formation

KW - Okcheon Basin

KW - deformation

KW - microfabrics

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Re-examination of a supposed ‘archaeocyath’ specimen from the Hyangsanni Formation, Okcheon Basin, Korea

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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