Neogene diatoms as the important source
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Koichi Aoyagi; Mamoru Omokawa
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Article
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1992
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Elsevier Science
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English
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Major oil and gas fields in Japan are located in the area extending from central Hokkaido through northeast Honshu. Most productive horizons are generally found in the late Middle Miocene (approximately 12-10 Ma) Onnagawa Formation of the Akita basin and equivalent formations of other basins. These