[Cover Photograph]

[Abstracts]

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* Study on characterization of manganese-oxidizing bacteria in the natural environment and estimation of its effect

Yutaka Kanai, Naoki Mita, Rie Takeuchi, Shin-ichiro Yoshida and
Nobuaki Kuchitsu (1-15) [PDF : 800 KB]

* Quaternary volcanoes in the geological map of Japan 1/200,000, Shirakawa, NE Japan: new evidences on the stratigraphy and radiometric ages

Takahiro Yamamoto (17-28) [PDF : 1,451 KB]

* Stratigraphy and structure of the Jurassic accretionary complex in the Daigo district, northern Ibaraki and eastern Tochigi Prefectures, central Japan

Satoshi Nakae (29-50 in English) [PDF : 3,192 KB]

* Artificial earthquakes observed by using a broadband seismometer and natural events during a seismic reflection survey

Toshiki Ohtaki, Shinobu Ito, Naomi Kano, Takanobu Yokokura and
Kazuo Yamaguchi (51-55) [PDF : 564 KB]

* Fission-track dating of the Lower to Middle Miocene in the Uozu area, central Japan

Yasuto Itoh and Mahito Watanabe (57-59) [PDF : 361 KB]

* Abstracts of the fourth meeting for research activities by the Research Center for Deep Geological Environments

(61-71) [PDF : 462 KB]