Ashigara Group

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Ashigara Group Hirabayashi, 1898

Coherent formation
Trough-fill sediments between the plate of Honshu side and the Izu block,, an island arc - island arc collision zone
late Pliocene - middle Pleistocene

Sedimentary facies: Marine, Fluvial
Lithofacies: Terrigenous clastic rocks

Thickness: 5,000 m or thicker
Upper limit: Conformity (Old Somma Deposits of Hakone volcano)

Ashigara Group
[ Upper ]
--------------
Shiozawa Formation
~~~~~~~~~~~~~~
Hata Formation
--------------
Seto Formation
''''''''/,,,,,,
Hinata Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Ashigara mountains, Kanagawa pref.
Distribution: Yamakita city, Ashigarakami county, Kanagawa pref. - Oyama city, Sunto county, Shizuoka pref.
Fossils: Oysters

Ishikawa et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.7, pp.291-304, DOI
Odawara et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.135-152 DOI
Tanikawa and Shimamoto (2007) Jour. Geol. Soc. Japan, vol.113, no.1, pp.27-32 DOI