岡山大学 地球科学研究報告
Published by Okayama University Earth Science Reports Editorial Committee

岡山市北部, 備前, 富原炭鉱の夾炭層と「山砂利層」との関係

Nakazawa, Keiji
Tanaka, Hajime
Abstract
The Bizen and Tomihara Coalfields which were situated in northern Okayama City, had produced lignite during 1940s. Distribution of coal measures indicates that the coal measures are intercalated in the middle of the so-called "Mountain Gravels". The "Mountain Gravels" is subdivided into two formations ; the older, about 34~35Ma, and the younger, about 27Ma, of fission track ages. The older formation inculudes the Bizen Coal Measures. On the other hand, the Tomihara Coal Measures are intercalated in the younger formation.
Keywords
Bizen Coal Measures
Tomihara Coal Measures
Okayama City
Paleogene
ISSN
1340-7414
NCID
AN10506284