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タイトルヨミ
オーストラリア ナントウブ ラクラン シュウキョクタイ カラノ オルドビスキ チュウキ ホウサンチュウ
日本語以外のタイトル
Middle Ordovician Radiolarians from the Lachlan Fold Belt, Southeastern Australia
ファイル
言語
英語
著者
梅田 真樹
後藤 広和
内容記述(抄録等)
Microfossil biostratigraphy and examination of pelagic sedimentary feature reveal the biotic event and environmental change in the Early Paleozoic. Radiolarians, conodonts and acri-tarchs occurred from black organic bedded cherts of the Mt. Stavely Complex in the Stawell Terrane of the Lachlan Fold Belt, western Victoria. This Fold Belt is regarded to be consist of Cambrian to early Carboniferous rocks, but paleontological investigation of conodonts and radiolarians indicates supposed Middle Ordovician or younger age for the examined siliceous rocks which previously supposed to be Cambrian.
Acritarchs regarded to be a cause of "red tide" occurred from lower horizon of radiolarian bearing bed, which is an important trigger of the Oceanic Anoxic Events in Late Ordovician. Middle Ordovician radiolarians are characterized by simple shell construction with randomly ornamented spicules and small thick shell. They are grouped into seven of basic skeleton forms and some show close relationship to Late Ordovician radiolarians.
掲載誌名
島根大学理学部紀要
26
開始ページ
131
終了ページ
144
ISSN
03879925
発行日
1992-12-25
NCID
AN00108106
出版者
島根大学理学部
出版者別表記
The Faculty of Science, Shimane University
資料タイプ
紀要論文
部局
総合理工学部
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