R2

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R2

Type locality: Hidakagawa river, Ryujin town, Tanabe city, Wakayama prefecture
Accretionary complex
Late Cretaceous
Correlation: Rb, lower Ru

Sedimentary facies: Marine
Lithofacies: Sandstone dominant interbedded sandstone and shale
Lithofacies (Minor): Sandstone
Sedimentary structures: Flute marks, Groove marks
Paleocurrent (Longitudinal current flow): from East to West-southwest
Paleocurrent (Lateral current flow): to Northwest

Thickness: 30 - 350 m

Ryujin Formation (Ryujin, Wakayama pref.)
[ Upper ]
/--/--/--/--/-
R5 = Rc
/--/--/--/--/-
R4 = Rb
/--/--/--/--/-
R3 = Ra, Rc
/--/--/--/--/-
R2 = Rb
/--/--/--/--/-
R1 = Ra
/--/--/--/--/-
[ Lower ]

Hidakagawa Group (Wakayama pref.)
[ Upper ]
/--/--/--/--/-
Hanazono Formation
/--/--/--/--/-
Yukawa Formation
/--/--/--/--/-
Miyama Formation
/--/--/--/--/-
Terasoma Formation
/--/--/--/--/-
Ryujin Formation
/--/--/--/--/-
[ Lower ]

Shimanto Belt (Nara pref.)
[ Upper ]
/--/--/--/--/-
Koyasan Group = North Shimanto
/--/--/--/--/-
Hidakagawa Group = North Shimanto
/--/--/--/--/-
Hikigawa Group = South Shimanto
/--/--/--/--/-
[ 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: Hidakagawa river - Tochidani - Miyashiro - Hiroihara - Orikawadani valley - Kitamatadani valley, Ryujin town, Tanabe city, Wakayama pref.; Shigesato - Furudanigawa river - Obiso - Matsubashiradani valley, Totsukawa city, Yoshino county, Nara pref.

Tokiwa et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.6, pp.270-273 DOI
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.)