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Volume 1956 (1956)
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Volume 1956, Issue 30
Displaying 1-6 of 6 articles from this issue
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[in Japanese]Article type: Article
1956 Volume 1956 Issue 30 Pages i-
Published: December 28, 1956
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSDownload PDF (169K) -
H. AKAMINE, S. IWAI, Kiyoshi KOIKE, Hiroshi NARUSE, Tadashi OGOSE, Mas ...Article type: Article
1956 Volume 1956 Issue 30 Pages 1-8a
Published: December 28, 1956
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSCarring out the intention of the late Professor Yanosuke OTUKA of the University of Tokyo, the Tertiary stratigraphy of the Miura Peninsula has been studied by collaboration of many investigators. The sequence of strata established is in descending order as Table 1. Generalized descriptions of these formations and members are given, together with some short notes on the structure.View full abstractDownload PDF (1415K) -
Yoshiro TAIArticle type: Article
1956 Volume 1956 Issue 30 Pages 9-18
Published: December 28, 1956
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSFrom similarities of the geologic history, many middle Neogene areas in Chugoku and Kinki districts may be grouped up, and be classified into two geologic provinces, "Setouchi" and "Sanin". The latter is subdivided into three subgeologic provinces, "Hondogawa", "Shimane Peninsula" and "Oki Islands". Then, from the results of the comparative studies on smaller Foraminifera from these provinces, the writer established tentatively the microbiostratigraphical units, in descending order as follow, (5) Nonion pacificum-Rotalia cf. beccariz Zonule (4) Uvigerina subperegrina・ Epistominella pulchella Zonule (3) Cyclammina spp.-Haplophragmoides spp. Zonule (2) Lagenonodosaria scalaris sagamiensis-Uvigerina crasszcostata Zonule (1) Miogypsina kotoi-Operculina complanata japonica Zonule and finally found some-facts, that Neogene marine strata of "Setouchi" province seem to belong to (1) and (2) Zonules, of "Hondogawa" to (2), (3) and (4) Zonules, of "Shimane Peninsula" to (3), (4) and (5) Zonules, and "Oki Island" to only (4) Zonule. As to the geological age of these Zonules, (1) and (2) Zonules may be considered to be middle Miocene (F2-F3), (3) and (4) to be last Miocene (G), and (5) to be earliest Pliocene (H_I).View full abstractDownload PDF (1481K) -
Masayuki SAITOArticle type: Article
1956 Volume 1956 Issue 30 Pages 19-25
Published: December 28, 1956
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSIn this paper, the writer discussed three majar problems regarding the form of the chromite deposits in Kamuikotan metamorphic rock complex Hokkaido, as follows; (1) Chromite deposits consist of many ore bodies, forming the echelon structure, and each of ore bodies is put the joint of country rock. (2) Chromite minerals are assembled along the side of the joint of country rock, and are occasio nally arranged in alternate lines with serpentine. (3) In some cases, chromite ore bodies are deformed secondarily by the orogenic movement. and described its application for prospecting.View full abstractDownload PDF (1113K) -
Yono TONOSAKIArticle type: Article
1956 Volume 1956 Issue 30 Pages 26-31
Published: December 28, 1956
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSThis short note described some interesting metamorphic phenomena of the inclusions obtained from the granitic migmatite in the southern Hidaka metamorphic zone. The writer concluded that present inclusion is a type of relict inclusion caused by the granitization. The mineral assemblage and texture of the inclusion is studied under the microscope and given some considerations on its genesis.View full abstractDownload PDF (899K) -
Norio FUJIArticle type: Article
1956 Volume 1956 Issue 30 Pages 32-35
Published: December 28, 1956
Released on J-STAGE: July 24, 2017
JOURNAL OPEN ACCESSThe collection of the fossil plants in this paper was made chiefly by the present writer for 7 days from 18th. October in the autumn of 1955. The Upper Mesozoic rocks in the south area of the Ozika Peninsula, according to Koji TAKAHASHI, can be divided as following formations: [table] The Ayukawa formation, more than 250m in thickness, consists of slate in the lower and sandstone with thin layers of slate in the upper. The fossil plants are particularly abundant in the lower horizon. The geological age of the Ayukawa Formation was correlated the Wealden by Koji TAKAHASHI. (1) The writer collected 17 species of fossil plants, from a new locality and discovered 9 fossil plants which have not been reported from the Ayukawa Formation. (2) The flora of the Ayukawa Formation is similar to that of the Tetori series. (3) Although the Tetori series was limited the Jurassic by S. OISHI, it must belong from the Upper Jurassic to the Lower Cretaceous at the Hida Massif and the Ozika Peninsula. [table]View full abstractDownload PDF (571K)
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