Raga Formation

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Raga Formation (Yabe and Yehara, 1913) Hanai et al., 1968

Invalid synonym: Raga Conglomerate

Coherent formation
Ezo forearc basin
Cretaceous
Intruded by: Jodogahama Rhyolite

Sedimentary facies: Fluvial
Sedimentary facies: Basal conglomerate
Sedimentary facies: Bay-head delta
Sedimentary facies: Debris flow, Talus cone
Lithofacies: Breccia
Lithofacies (Minor): Calcareous sandstone
Sedimentary structures: Cross stratification

Thickness: 15 - 40 m
Upper limit: Conformity (Tanohata Formation)
Lower limit: Unconformity (Koshimeguri Formation, Miyako Granite, Rikuchu Group)

Miyako Group
[ Upper ]
--------------
Hideshima Formation
?--?--?--?--?-
Aketo Formation
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Sakiyama Formation
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Hiraiga Formation
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Tanohata Formation
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Raga Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Taro - Sanno-iwa, Miyako city, Iwate pref.; Heipe seashore - Hiraiga seashore, Tanohata city, Shimohei county, Iwate pref.

Umetsu et al. (2013) Jour. Geol. Soc. Japan, vol.119, Supplement, pp.82-95 DOI
Yoshida and Katada (1984) Geology of the Miyako District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 44p. (in Japanese with English abstract 6p.)
Shimazu et al. (1970) Geology of the Taro District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 54p. (in Japanese with English abstract 6p.)