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Title Transcription
ジョウブ チュウシントウ トキグチ トウドソウ タイセキ ボンチ ト ソノ シュウヘン ノ コチケイ ヘンカ ニ トモナウ コショクセイ ノ ヘンカ
Title Alternative (English)
Change of paleovegetation caused by topographic changei n and around a sedimentary basin of the Upper Miocene Tokiguchi Porcelain Clay Formation,central Japan
File
language
jpn
Author
Momohara, Arata
Saito, Takeshi
Description
Species composition of plant macrofossil assemblages from the Tokiguchi Porcelain Clay Formation in Tajimi City,central Japan are compared on a stratigraphic basis.The formation was deposited in a fluvial environment in a sedimentary basin at about 10 Ma(early Late Miocene).The fossil assemblages always contained subtropical elements indicating warm climate.Cool temperate elements increased in the upper hodzon,along with herbaceous taxa including annuals.This change is thought to reflect topographic changes in and around the sedimentary basin.During deposition of the lower horizon,plant macrofossils were derived from wetland vegetation and forests between the distal end of the fan and uplands along the sedimentary basin.The forest there was composed mainly of deciduous broad-leaved trees mixed with conifers and evergreen broad-leaved trees,and the herb layer was less developed.During deposition of the upper horizon,the drainage basin of the river expanded to include higher mountains,from which the cool temperate elements were derived.Active tectonism at this time increased disturbance,creating the habitat which enabled herbaceous plants(including annuals)to grow on the deposits of a large gravelly rivers.
Journal Title
島根大学地球資源環境学研究報告
Volume
20
Start Page
49
End Page
58
ISSN
13439774
Published Date
2001-12-28
NCID
AA11455176
DOI(SelfDOI)
Publisher
島根大学総合理工学部地球資源環境学教室
Publisher Aalternative
Department of Geoscience, Interdisciplinary Faculty of Science and Engineering, Shimane University
NII Type
Departmental Bulletin Paper
Format
PDF
Text Version
出版社版
OAI-PMH Set
Interdisciplinary Graduate School of Science and Engineering
Remark
12-14,16+ / 1993+
中山勝博助教授追悼特集
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