In the Chichibu Terrane of the Mt.Honjyo area in the mie-machi, Oita Prefecture, the Lower Cretaceous System, called Honjyo Formation (new name), distribute. This paper mainly deals with the outline of lithology and fossils.
On the basis of lithology and fossils, this formation is divided into two parts, namely the lower and upper.
The lower part begins with conglomerate or conglomeratec sandstone, and is followed by medium-grained with
intercalation of alternating beds of sandstone and shale, and further by thick-bedded dark gray sandy shale and shale.
The conglomerate comprises rounded granules and pebbles of chert.
The upper part thick-bedded medium-grained sandstone and sandy shale are 60-70m thick, containing marine fossils such as pelecypods and gastropods at several horizons.
The Honjyo Formation has been correlated with the Monobe-gawa Group in Shikoku on the basis of fossil evidence.
It is well-known that they yield the bivalve assemblage which is called the Northern-Tethyan fauna.
雑誌名
熊本大学教育学部紀要
巻
66
ページ
325 - 330
発行年
2017-12-19
ISSN
21881871
書誌レコードID
AA12653153
フォーマット
application/pdf
形態
10983896 bytes
著者版フラグ
publisher
日本十進分類法
456.57
その他の言語のタイトル
Cretaceous formation in the Mt. Honjyo area, Mie-machi, Oita Prefecture
大分県三重町本城山地域の白亜系
KKK0066_325-330.pdf
(10.98MB)
