BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN
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Published By National Institute Of Advanced Industrial Scicence

2186-490x, 1346-4272

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Diatom biochronology of the horizon of warm water calcareous microfossils in the upper Miocene Funakawa Formation distributed in Shimo-arakawa, Daisen City, Akita Prefecture, Japan.

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN ◽

10.9795/bullgsj.72.459 ◽

2021 ◽

Vol 72 (6) ◽

pp. 459-477

Author(s):

Yukio YANAGISAWA

Keyword(s):

Upper Miocene ◽

Akita Prefecture ◽

Calcareous Microfossils

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Fossil freshwater centric diatom Mesodictyon japonicum Yanagisawa & H.Tanaka from the upper Miocene marine deposits distributed in the Ninohe-Sannohe area, near the boundary between Iwate and Aomori prefectures, Northeast Japan

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN ◽

10.9795/bullgsj.72.479 ◽

2021 ◽

Vol 72 (6) ◽

pp. 479-493

Author(s):

Yukio YANAGISAWA

Keyword(s):

Centric Diatom ◽

Upper Miocene ◽

Marine Deposits

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The Middle to Late Pleistocene tephrostratigraphy around the Nasu Volcano Group, NE Japan: new description of the Kawatani Pyroclastic Fall Deposit and the horizon of the Yosasagawa and Higashi-iwazaki Debris Avalanche Deposits

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN ◽

10.9795/bullgsj.72.397 ◽

2021 ◽

Vol 72 (5) ◽

pp. 397-420

Author(s):

Takahiro YAMAMOTO

Keyword(s):

Late Pleistocene ◽

Debris Avalanche ◽

Fall Deposit ◽

Ne Japan ◽

Pyroclastic Fall

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Geochemistry of chromian spinels from serpentinites distributed in eastern margin of the Kanto Mountains

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN ◽

10.9795/bullgsj.72.447 ◽

2021 ◽

Vol 72 (5) ◽

pp. 447-458

Author(s):

Hidetoshi HARA ◽

Ken-ichiro HISADA

Keyword(s):

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Preparation and release of gravity and magnetic data collected by R/V Hakurei-maru

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN ◽

10.9795/bullgsj.72.421 ◽

2021 ◽

Vol 72 (5) ◽

pp. 421-445

Author(s):

Takemi ISHIHARA

Keyword(s):

Magnetic Data ◽

Gravity And Magnetic ◽

Gravity And Magnetic Data

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Geochemical characteristics of basaltic rocks from the Omama Complex of Jurassic accretionary complex in the Ashio Mountains, central Japan

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN ◽

10.9795/bullgsj.72.371 ◽

2021 ◽

Vol 72 (4) ◽

pp. 371-381

Author(s):

Tsuyoshi ITO ◽

Yuki KUSANO

Keyword(s):

Geochemical Characteristics ◽

Accretionary Complex ◽

Central Japan ◽

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Radiolarians and foraminifers from the Omama Complex of Jurassic accretionary complex in the Ashio Mountains, central Japan

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN ◽

10.9795/bullgsj.72.359 ◽

2021 ◽

Vol 72 (4) ◽

pp. 359-370

Author(s):

Tsuyoshi ITO ◽

Noritoshi SUZUKI ◽

Katsuo SASHIDA

Keyword(s):

Accretionary Complex ◽

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Geology and correlation of Jurassic accretionary complex in the Ashio Mountains, central Japan: Investigation on the Kiryu and Ashikaga District (Quadrangle series 1:50,000)

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN ◽

10.9795/bullgsj.72.201 ◽

2021 ◽

Vol 72 (4) ◽

pp. 201-285

Author(s):

Tsuyoshi ITO

Keyword(s):

Accretionary Complex ◽

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Conodont fossils from the Kiryu and Ashikaga District (Quadrangle series 1:50,000),central Japan with emphasis on the reexamination of “Carboniferous” conodonts from the Ashio Belt

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN ◽

10.9795/bullgsj.72.325 ◽

2021 ◽

Vol 72 (4) ◽

pp. 325-344

Author(s):

Shun MUTO ◽

Tsuyoshi ITO

Keyword(s):

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Biotite granodiorite of the Ashikaga Body and contact metamorphic rock in Nagusa, Ashikaga City, Tochigi Prefecture, central Japan

BULLETIN OF THE GEOLOGICAL SURVEY OF JAPAN ◽

10.9795/bullgsj.72.383 ◽

2021 ◽

Vol 72 (4) ◽

pp. 383-396

Author(s):

Tsuyoshi ITO ◽

Yoshihiro NAKAMURA

Keyword(s):

Metamorphic Rock ◽

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