テフラの鉱物特性から見た山陰の砂丘

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Title
テフラの鉱物特性から見た山陰の砂丘
Title
Coastal Sand Dunes of San-in District as Seen from Mineralogical Characteristics of Tephra Deposits
Title Transcription
テフラ ノ コウブツ トクセイ カラ ミタ サンイン ノ サキュウ
Creator
Miura Kiyoshi
Source Title
島根大学教育学部紀要. 自然科学
Memoirs of the Faculty of Education, Shimane University. Natural science
Volume 23
Issue 2
Start Page 1
End Page 23
Journal Identifire
ISSN 05869943
Descriptions
Along the Japan sea coast of western part of Izumo plain in Shimane prefecture and the Japan sea coast from central to eastern part in Tottori prefecture, coastal sand dunes are well developed.
In these districts, Quatemary pyroclstics and volcanic ashes ejected from many volcanoes such as Daisen (DMP, DKP, KmA, HgA), Sambe (SKP, SUn), Aso (Aso-4), Aira (AT) and Kikai (Ah), are interbeded with eolian sand deposits. They are exactly distinguished by chemical characteristics of their magnetite, and volcanic glass due to chemical analyses by EPMA.
The relationship of eolian sand deposits to these tephra deposits are shown in Fig.3 and 12.
The eolian sand deposits are found in three horizons, one conformably overlying the Middle terrace deposits in Riss-Wurm stage (Ancient eolian sand dune I), one superposed on the Daisen Matsue fall pumice (DMP) with conformable relation and covered by loamy sediment correlated to Aso-4 tephra (ancient eolian sand dune II), other overlying the Akahoya ash (Ah) (Recent eolian sand dune).
The ancient eolian sand dune II has developed continuously to the ancient eolian sand dume I in the circumstances of the lowering in the sea level with eustatic sea level changes in Riss-Wurm stage.
Recent eolian sand dune was developed under strong wind condition in the circumstances of the lowering in the sea level after deposition of Akahoya ash (Ah).
Language
jpn
Resource Type departmental bulletin paper
Publisher
島根大学教育学部
The Faculty of Education Shimane University
Date of Issued 1989-12-25
Access Rights open access
Relation
[NCID] AN00107941