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Volume 1963 (1963)
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Volume 1963, Issue 69
Displaying 1-7 of 7 articles from this issue
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Akiho MIYASHIROArticle type: Article
1963 Volume 1963 Issue 69 Pages i-ii
Published: November 25, 1963
Released on J-STAGE: July 24, 2017
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Hokuriku Quaternary Research GroupArticle type: Article
1963 Volume 1963 Issue 69 Pages 1-15
Published: November 25, 1963
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSThe Quaternary deposits of this district are divided into four units in ascending order as follows : the Saida, the Kamitako, the Kubo formations and the Alluvial deposits. The Saida formation presumably belonging to early Pleistocene differs in sedimentary facies and geologic structure from those of the Himi (Pliocene) age. It indicates a considerable upheaval of the land at this stage, meaning the retrogressive phase of the Neogene basin in the district. The Kamitako formation is the non-marine deposits of valley-filling type, the age of which seems to be early middle Pleistocene. It appears that main distribution of the Kamitako formation is mostly controlled by the Ebisaka fault zone activated in the post-Saida stage (early to middle Pleistocene). Marine terraces, 20-70 m high above the present sea level, and their deposits seem to be a significant evidence of two phases of transgression during the late Pleistocene, probably due to glacioeustatic movement. The Kubo formation containing the Asahiyama shell bed may be correlated with the Hiradoko formation (the Riss-Wurm interglacial) in north Noto Peninsula and the Simosueyoshi phase of Kwanto region.View full abstractDownload PDF (1854K) -
Yoshikazu HAYAMAArticle type: Article
1963 Volume 1963 Issue 69 Pages 15-
Published: November 25, 1963
Released on J-STAGE: July 24, 2017
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Kenzan Research GroupArticle type: Article
1963 Volume 1963 Issue 69 Pages 16-19
Published: November 25, 1963
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSThe Sanbagawa metamorphic belt extends from east to west in Sikoku. In this paper the stratigraphy and the geologic structure of the metamorphic belt of Eastern Sikoku are described. Piedmontite schists which are interbedded in green schists and pelitic schists were used as key beds to divide the formations and to clarify the geologic structure. Thus, the crystalline schist formations of the metamorphic belt are stratigra-phically divided into 8 formations. The dominant rock types of the crystalline schist formation are pelitic and psammitic schists, green schists (epidote-glaucophane schists, pumpellyite-actinolite schists, epidote-actinolite schists) and quartz schists. No igneous rocks except small amounts of serpentinites have been found in the belt. Structurally, the crystalline schist formation is gently folded. The axes of the folds lie in E-W or NW-SE directions and faults with E-W and with E-W directions traverse the whole structures. Several cupriferous pyrite deposits appear to exist at the distinct horizon in the crystalline schist formation.View full abstractDownload PDF (722K) -
Tetsuro HARADA, Takao TOKUOKA, Eiji MATSUMOTOArticle type: Article
1963 Volume 1963 Issue 69 Pages 20-24a
Published: November 25, 1963
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSIn the southern part of the Kii peninsula are developed the thick strata belonging to the Shimantogawa Supergroup. They have been collectively called the Muro Group and are overlain with unconformity by the middle Miocene Kumano and Tanabe Groups. The Kumano and Tanabe Groups represent gentle geological structures, while the Muro Group shows complicated geological structures. From general lithological and structural aspects the Muro Group has been provisionally assigned to the Palaeogene Period, although no reliable fossil evidence has been found. The writers divided the Muro Group into the following three subgroups in ascending order, i.e. the Otonashigawa-Muro, the Yomurakawa-Muro and the ascending order, i. e. the Otonashigawa-Muro and the Ukekawa-Muro subgroups. The Ukekawa-Muro overlies unconformably the 賓murakawa-Muro, and the Yomurakawa-Muro overlies conformably the Otonashigawa-Muro. Fortunately the writers discovered the ill-preserved molluscan fossils which are referred to Costacallista cfr. shikokuensis, Venericardia (Cyclocardia) toliunagai and Portlandia (Portlandella) sp. from the lower part of the Ukekawa-Muro at Binda of Wabuka-ku, Kushimoto-cho, Nishimuro-gun, Wakayama Prefecture. These fossils have the correlative elements with the so called Asagai-Poronai fauna which is regarded to the upper Oligocene or the lower Miocene. Consequently it is ascertained that the Muro Group contains the upper Oligocene or the lower Miocene strata at its upper part.View full abstractDownload PDF (906K) -
Koshiro KIZAKIArticle type: Article
1963 Volume 1963 Issue 69 Pages 30-38
Published: November 25, 1963
Released on J-STAGE: July 24, 2017
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Ishikari Lowland Research Group, [in Japanese]Article type: Article
1963 Volume 1963 Issue 69 Pages 42-
Published: November 25, 1963
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSDownload PDF (230K)
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