Awagura Formation

Awagura Formation (Nagahama, 1951) Yoshikawa et al., 2002

Invalid synonym: Awagura Tuff Formation, Iwakurayama Rhyolite

Type locality: Sosogi, Wajima city - Tsubazaki, Maura town, Suzu city, Ishikawa prefecture
Volcanic rocks
middle Miocene (ca. 15.6 Ma; 16.3 - 15.3 Ma, Diatoms; 16.1, 15.9 Ma, K-Ar)

Sedimentary facies: Marine
Sedimentary facies: Submarine lava dome
Lithofacies: Biotite rhyolite lava, Volcanic breccia, Pumiceous lapilli tuff, Tuff, Tuffaceous sandstone (Glauconite)
Lithofacies (Minor): Siliceous siltstone

Source: Mount Iwakurayama, Wajima city
Thickness: 0 - 290 m or thicker
Upper limit: Conformity (Iida Formation)
Lower limit: Conformity (Hojuji Formation)

northeast Noto peninsula
[ Upper ]
~~~~~~~~~~~~~~
Iizuka Formation
--------------
Iida Formation
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Awagura Formation
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Hojuji Formation
--------------
Higashiinnai Formation
~~~~~~~~~~~~~~
Horyuzan Formation
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Kamiwazumi Formation / Matsunagi Formation
--------------
Goroku Formation
~~~~~~~~~~~~~~
Konosuyama Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Sosogi - Mount Iwakurayama, Wajima city, Ishikawa pref.; Tsubazaki, Maura town, Suzu city, Ishikawa pref.
Fossils: Shellfishes (Palliolum sp., Solamen sp.), Sponges (Aphrocallistes sp.), Foraminifera (Operculina japonica), Diatoms

Kano (2018) Jour. Geol. Soc. Japan, vol.124, no.10, pp.781-803 DOI
Yoshikawa et al. (2002) Geology of the Suzumisaki, Noto-iida and Horyuzan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 76p. (in Japanese with English abstract 4p.)