Ryoseki Group

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Ryoseki Group

Coherent formation
Cretaceous

Sedimentary facies: Marine, Brackish

Thickness: ca. 100 - 150 m
Upper limit: Conformity (Arida Formation)
Lower limit: Unconformity (Northern Chichibu Belt)

Ryoseki Group (northern Yuasa, Wakayama pref.)
[ Upper ]
--------------
Yuasa Formation
~~~~~~~~~~~~~~
[ Lower ]

Ryoseki Group (southern Yuasa, Wakayama pref.)
[ Upper ]
--------------
Kitadani Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Kochi pref.; Wakayama pref.

Hirayama and Tanaka (1956) Kainan, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 62p. (in Japanese with English abstract 12p.)