Teragi Formation

[ Top ] [ Japanese ]

Teragi Group Wadatsumi and Matsumoto, 1958

Type locality: Hyogo prefecture
Coherent formation
Teragi Caldera
Pliocene (3.2 - 3.1 Ma)

Sedimentary facies: Terrestrial, Lacustrine

Thickness: ca. 700 - 1,000 m
Thickness (Basal conglomerate): a few m
Distribution (East - West): 15 km
Distribution (South - North): 20 km
Upper limit: Unconformity (Oginosen Volcanic Rocks)
Lower limit: Unconformity (Tottori Granite, Fuganji Mudstone Member, Sangun Metamorphic Belt)

Teragi Group
[ Upper ]
~~~~~~~~~~~~~~
Terada Andesite Member
'''''''/,,,,,,
Haruki Mudstone Member
--------------
Yudani Conglomerate Member / Kayano Tuffaceous Sandstone and Conglomerate Member
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Utaosa Rhyolite Member
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Basal conglomerate
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Teragi, Shinonsen city, Mikata county, Hyogo pref.; Tottori pref.

Sakiyama et al. (2012) Jour. Geol. Soc. Japan, vol.118, Supplement, pp.1-20 DOI
Utada (2008) Jour. Geol. Soc. Japan, vol.114, no.5, pp.231-245 DOI
Uemura et al. (1979) Geology of the Wakasa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 91p. (in Japanese with English abstract 8p.)