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ID 27373
file
title alternative
Carbonates Fills in Fossil Shells from the Underground Quaternary Deposits of Hiroshima City, Southwest Japan
creator
Teraoka, Akefumi
Kitagawa, Ryuji
Suzuki, Morihisa
subject
Quaternary
shell fossil
Drusyfill
carbonates
第四紀
貝化石
殻内沈殿物
炭酸塩鉱物
NDC
Earth sciences. Geology
abstract
The underground Quaternary deposits in Hiroshima City yield abundant fossil shells. Among them, Anodontia strearnsiana Oyama and Dosinella pencillata (Reeve) are the representatives, which contain drusy infill carbonates with such various colors as red, yellow and orange. Gray-to dark-colored deposits have filled inner side of the drusy carbonates. The mode of occurrence of the fossils suggests that the shells have been fossilized almost preserving their life position. Based on X-ray diffraction analyses, it is revealed that shells and drusy infills consist mostly of aragonite and calcite, respectively, and that the inner deposits are composed mainly of calcite, illite, feldspar and quartz. X-ray fluorescence analyses have clarified that colored-infill carbonates are richer in MnO and MgO and poorer in CaO and SrO than the shells and that the inner deposits have relatively higher SiO2, Al2O3 and K2O than the shells and infills
journal title
Bulletin of the Faculty of School Education, Hiroshima University. Part II
volume
Volume 22
start page
21
end page
30
date of issued
2000-01
publisher
広島大学学校教育学部
issn
0387-4869
ncid
language
jpn
nii type
Departmental Bulletin Paper
HU type
Departmental Bulletin Papers
DCMI type
text
format
application/pdf
text version
publisher
department
Graduate School of Education
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