Radiolarian-bearing conglomerate from the Hayang Group, the Kyongsang Supergroup, southeastern Korea |
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| Authors: | T Mitsugi K Ishida B -G Woo K -H Chang S -O Park H Hirano |
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| Institution: | a Department of Earth Sciences, School of Education, Waseda University, Tokyo 169-8050, Japan;b Laboratory of Geology, Faculty of Integrated Arts and Sciences, University of Tokushima, Tokushima 770-8502, Japan;c Department of Geology, College of Natural Sciences, Kyungpook National University, Taegu 702-701, South Korea;d Japan Society for the Promotion of Science, Japan |
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| Abstract: | The non-marine Cretaceous Kyongsang Supergroup, which is divided into the Sindong, the Hayang and the Yuchon groups, is widely distributed in southeastern Korea. Radiolarian-bearing pebbles are collected from the conglomerates of the Kumidong and the Kisadong formations of the Hayang Group. The age of radiolarian fossils range from Late Permian to Middle Jurassic. In Korea, Permian to Middle Jurassic marine chert beds are not exposed. The directions of paleocurrents of the Kumidong and the Kisadong formations are mainly from the northeast to southwest. During Cretaceous time, the Mino-Tamba Belt, within which Permian to Middle Jurassic chert beds are exposed, is suggested to have been located northeast of the Kyongsang Basin. The radiolarian faunas of the Hayang Group are similar to those of the Mino-Tamba Belt and other associated Mesozoic accretionary belts in Japan (e.g. the Ashio Belt). The provenance of the radiolarian-bearing pebbles collected from the Kumidong and the Kisadong formations is interpreted to be the Mino-Tamba Belt and other associated Mesozoic accretionary belts in Japan. |
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| Keywords: | Radiolarian-bearing conglomerate Radiolaria Cretaceous Hayang Group Korea Mino-Tamba Belt |
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