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

Facies analysis of the Jito Formation ( Upper Triassic Nariwa Group ) in Jito Area, Kawakami, Okayama Pref., SWJapan.

Masaoka, Yuto
Published Date
2015-12-27
Abstract
Facies analysis and analysis of stratigraphy together with folded structure of the Norian Jito Formation were studied in Jito Area, Kawakami, Okayama Pref., SW Japan. Results of regional mapping and measured sections reconstruct three-dimensionally distribution of the Jito Formation. The Jito Formation is sub-divided into the four new members; the Shimohira Muddy Sandstone Member, the Otofuji Coarse-grained Turbidite Member, the Misawa Fine-grained Turbidaite Member, and the Ide Conglomerate Sandstone Member in ascending order. The shimohira Muddy Sandstone Member is interpreted to be deposited in an inner-bay. The Otofuji Coarse-grained Turbidite Member and The Misawa Fine-grained Turbidite Member are considered to be deposited on a continental shelf. The Ide Conglomerate Sandstone Member is inferred to be a shallow marine deposit. As a result, the Jito Formation is regarded as one transgressive-regressive package.
Keywords
Jito Formation
Nariwa Group
Norian
facies analysis
turbidite
ISSN
1340-7414
NCID
AN10506284
NAID
JaLCDOI