number of downloads : ?
Title Transcription
トイシソウ ノ ナカニ P T キョウカイ ガ アルカ : フ トリアスキ コセイ ノ ホウサンチュウ ニツイテ
Title Alternative (English)
P/T boundary occurs in the“Tolshi type”shale of Southwest Japan-Appendix : Early Triassic radiolarians
File
language
jpn
Author
Yamashita, Masayuki
Ishida, Koutaro
Yamaoka, Yuji
Goto, Hirokazu
Description
The P/T (Permian/Triassic) boundary is one of the most important boundary for phanerozoic geohistory which is said to be a drastic change of the lives between the Paleozoic and Mesozoic. The boundary rocks have been examined in the shallow marine sediments of the Tethyan regions and less knowledge has been obtained from the pelagic sediments.
Recent progress of the radiolarian biostratigraphy together with conodont zonation reveals the probable Latest Permian cherts of Southwest Japan,and possible P/T boundary lies in the overlying "Toishi"rocks (siliceous claystones).
Presumed succession of the Late Permian to Early Triassic pelagic sediments is as follows in descending order.
1 probable Spathian (Early Triassic) bedded cherts
2 alternating beds of bedded cherts and siliceous claystones
3 siliceous claystones (Toishi rocks) including black organic mudstones
4 black mudstones
5 Late Permian Meoalbaillella bedded cherts
Journal Title
Geological reports of Shimane University
Volume
10
Start Page
47
End Page
52
ISSN
0287816X
Published Date
1991-07-30
NCID
AN00054980
Publisher
島根大学理学部地質学教室
Publisher Aalternative
Department of Geology, Faculty of Science, Shimane University
NII Type
Departmental Bulletin Paper
Format
PDF
Text Version
出版社版
OAI-PMH Set
Faculty of Science and Engineering
Remark
1-11 / 1982-1992
島田昱郎教授退官記念論誌集
他の一覧