한국지구과학회지 (Journal of the Korean earth science society)

  • 제24권8호
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  • Pages.668-683
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  • 2003
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  • 1225-6692(pISSN)
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  • 2287-4518(eISSN)
한국지구과학회 (The Korean Earth Science Society)
권호 표지

강원도 영월 화병 지역의 전기 오르도비스기 문곡층의 필석 생물층서

Graptolite Biostratigraphy of the Mungok Formation (Early Ordovician) in the Hwabyung Area, Yeongwol, Korea

  • 김택자 (한국교원대학교 지구과학교육과) ;
  • 진영필 (한국교원대학교 지구과학교육과) ;
  • 김정률 (한국교원대학교 지구과학교육과)
  • Kim, Teak-Ja (Department of Earth Science Education, Korea National University of Education) ;
  • Jin, Young-Pil (Department of Earth Science Education, Korea National University of Education) ;
  • Kim, Jeong-Yul (Department of Earth Science Education, Korea National University of Education)
  • 발행 : 2003.12.31
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초록

강원도 영월 화병 지역의 문곡층 상부에서 4속 5종의 필석 화석을 Dendrograptus sp., Callograptus curvithecalis Mu 1955, Adelograptus tenellus Linnarsson, 1871, Adelograptus sp. 그리고 Psigraptus jacksoni Rickards and Stait, 1984로 분류하여 기재하였다. 이들의 대부분은 한국에서 두 번째 보고되는 것이며 특히, Psigraptus는 캐나다 유콘(Yukon), 오스트레일리아의 빅토리아(Vctoria)와 태스메니아(Tasmania), 중국의 질린과(Jilin) 허베이(Hebei)에 이어 세계에서 6번째 보고이다. 문곡층 상부에서 산출된 화석에 의해 Adelograptus대, Callograptus-Dendrograptus대 및 Psigraptus대로 세 개의 필석 생물대가 인지된다. 이들 필석 생물대는 오스트레일리아 란스필드 지역에 분포하는 란스 필드층(Lancefield Formation)의 La 1.5대와 캐나다 유콘 지역의 로드리버층 (Road River Formation)의 Psigraptus대 및 북중국 질린 지역의 엘리층(Yehli Formation)의 Psigraptus대와 대비된다. 화병 지역에 분포한 문곡층 상부에서 산출되는 필석 화석은 이 층의 상부가 후기 트레마독(Tremadoc)의 초기임을 지시한다.

Five species of graptolites belonging to four genera were described from the upper part of the Mungok Formation in the Hwabyung area of Yeongwol, Korea. They are Dendrograptus sp., Callograptus curvithecalis Mu 1955, Adeiograptus tenellus Linnarsson, 1871, Adelograptus sp., and Psigraptus jacksoni Rickards and Stait, 1984. Most of them are reported for the second time in Korea, and the occurrence of Psigraptus is the sixth time ever in the world, following the Yukon Territory of Canada, the Vctoria and Tasmania areas of Australia, and the Jilin and Hebei areas of China. Based on the graptolites, three biozones were recognized from the upper part of the Mungok Formation in the Hwabyung area: the Adelograptus Zone, the Callograptus-Dend개graptus Zone, and the Psigraptus Zone, in ascending order. These graptolite zones are correlated with the La 1.5 Zone (Psigraptus and Clonograptus Zone or Assemblage 3) of Vctoria, Australia, the Psigraptus Zone of the Road River Formation in Yukon, Canada, and the Psigraptus Zone of the Yehli Formation of Hunjiang, Jilin, nonh China. Therefore, according to the graptolites and their biozones, the age of the upper part of the Mungok Formation is assigned to be early Late Tremadoc.

키워드

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