Correlation of the Km2 Tephra Bed in the Kitaura Formation in the Oga Peninsula, Akita region to the SK100 Tephra Bed in the Niigata region, northeast Japan
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- KUROKAWA Katsuki
- Faculty of Education and Human Sciences, Niigata University
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- YAHAGI Haruna
- Faculty of Education and Human Sciences, Niigata University
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- TAN Makiko
- Faculty of Education and Human Sciences, Niigata University
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- NAGAHASHI Yoshitaka
- Faculty of Education, Fukushima University
Bibliographic Information
- Other Title
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- 男鹿半島北浦層のKm2テフラ層と新潟地域のSK100テフラ層の対比
- オガ ハントウ キタウラソウ ノ Km2 テフラソウ ト ニイガタ チイキ ノ SK100 テフラソウ ノ タイヒ
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Abstract
The early Pleistocene Km2 Tephra Bed in the Kitaura Formation in the Oga Peninsula, Akita region of northeast Japan was correlated to the SK100 Tephra Bed in the Uonuma and Taira Formations in the Niigata region, central Japan. The Km2 and SK100 Tephras are mainly composed of micropumice type glass shards, accompaning 10-38% plagioclase crystals. Biotite crystals are dominant in mafic minerals, accompaning small amount of allanite in common. Chemical composition of the glass shards are also coincident. Basal units of both Tephra Bed are similar in lithlogy. The SK100 Tephra had been revealed as a subaqueous gravity flow deposit of about 1.6Ma in the Niigata region. The continuity of this gravity flow to the Akita region, which is about 450km apart from the possible on-land volcanic source, was suggestively discussed.
Journal
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- Earth Science (Chikyu Kagaku)
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Earth Science (Chikyu Kagaku) 58 (5), 345-350, 2004
The Association for the Geological Collaboration in Japan
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Details 詳細情報について
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- CRID
- 1390282679242145792
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- NII Article ID
- 110004860780
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- NII Book ID
- AN00141269
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- ISSN
- 21897212
- 03666611
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- NDL BIB ID
- 7103433
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
- KAKEN
- Crossref
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- Abstract License Flag
- Disallowed
