M1

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M1

Accretionary complex
middle - late Eocene

Sedimentary facies: Marine
Lithofacies: Sandstone, Sandstone-dominant interbedded sandstone and mudstone
Sedimentary structures: Parallel stratification, Cross stratification, Flute marks, Groove marks, Slump structure
Paleocurrent: from East-northeast

Thickness: ca. 500 - 1,100 m
Lower limit: Conformity (W2)

Mitogawa Formation
[ Upper ]
--------------
M3
--------------
M2
--------------
M1
/--/--/--/--/-
[ Lower ]

Muro Group (South)
[ Upper ]
/--/--/--/--/-
Shimotsuyu Formation
--------------
Mitogawa Formation
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Wabuka Formation
/--/--/--/--/-
[ Lower ]

Shimanto Belt (Wakayama pref.)
[ Upper ]
/--/--/--/--/-
Koyasan Group = North Shimanto
/--/--/--/--/-
Hidakagawa Group = North Shimanto
/--/--/--/--/-
Nyunokawa Formation
/--/--/--/--/-
Otonashigawa Group
/--/--/--/--/-
Muro Group
/--/--/--/--/-
[ Lower ]

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

Distribution: Hisohara - Kobushigawa river, Kozagawa city, Higashimuro county, Wakayama pref.; Ogama - Esumigawa river - Harihakotoge pass - Kotonotoge pass - Susami - Ichihara - Sumikidani valley - Wabukagawa river - Nishikurigaito - Okanokuroshima island - Cape Esuzaki - Nagai - Unohirami - Sanzaki, Susami city, Nishimuro county, Wakayama pref.
Fossils (Trace fossils): Paleodictyon isp.

Tokuoka et al (1981) Geology of the Ryujin District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 6p.)
Tateishi et al. (1979) Geology of the Esumi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 65p. (in Japanese with English abstract 6p.)