Geoscience reports of Shimane University

島根大学総合理工学部地球資源環境学教室

ISSN:1343-9774

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Use this link to cite this item : https://ir.lib.shimane-u.ac.jp/31112

Geoscience reports of Shimane University 15

1996-12-25 発行

島根県桜江町北西部に分布する漸新統桜江層群

Oligocene Sakurae Group in the northwestern area of Sakurae Town,Shimane Prefecture

Nakazawa, Koichi

Komuro, Hiroaki

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c006015020.pdf 389 KB

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The Oligocene Sakurae Group consists of basalt lavas，dacitic pyroclastic rocks，dacitic welded tuffs and andesite lavas, in ascending order. This group is probably in fault contact with the basement Sangun metamorphic rocks，and forms a gentle half basin and not ar esurgent dome. Some dikes and plutons are emplaced along the faults. These structural characters suggest the formation of a cauldron closely related with the volcanic activity producing the Sakurae Group. NNW-SSE Strike slip faults cut the Sakurae Group after the formation of the cauldron.13;

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Memorandums on the Quaternary Researches in San'in District/

PP. 9 - 16

On the Sea Level of the Yayoi Period in San'in District : Examined from the point of view of the location of sites/

PP. 17 - 25

Holocene paleogeography of Lakes Nakaumi and Shinji : A review/

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The Akahoya (K-Ah) Tephra discovered from the SB1 drillcore in Lake Shinji, and reexamination of Holocene Paleographic Changes/

PP. 35 - 40

Pollen analysis of the OH94 drilling samples from Lake Hane,Oda-City,Shimane Prefecture,Southwest Japan/

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Disappearance of Tertiary flora,an example from pollen stratigraphy in Western Honshu,Japan./

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Daisen Hiruzenbara Pumice(DHP) and hpm2 Pumice erupted from the Daisen Volcano/

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Stratigraphy and ages of pyroclastic deposits since Ukinuno black soil of Sanbe Volcano,Shimane Prefecture,Japan/

PP. 61 - 62

Depositional processes of Pliocene Souri tephra bed,central Japan/

PP. 63 - 73

Some selected outcrops of the Pliocene-Pleistocene Tsunozu Formation on the San'in Japan Sea coastal region/

PP. 75 - 78

第四系「都野津層」と植物化石について

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Diatoms from the Lower-Middle Miocene in the Izumo Basin, Shimane Prefecture,southwest Japan/

PP. 93 - 101

Gradual Changes of Hardness Distribution in Slope Surface Composed of Shirasu (Dacitic pyroclastic flow deposits) in Southern Kyushu, Japan/

PP. 103 - 114

Chemical compositions of the constituent minerals of the Kyrghyzstan high-P and ultrahigh-P metamorphic rocks

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Undrained shear strength and interrelationships among CIUC, CKoUC, ClUE, and CKoUE tests

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Oligocene Sakurae Group in the northwestern area of Sakurae Town,Shimane Prefecture/

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Sr and Nd isotopic analyses,using a thermal ionization mass spectrometer MAT262/

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