[ Top ] [ Japanese ]

Yadorigizawa Formation

• Volcanic rocks
• Oceanic arc of Paleo-Izu-Bonin arc
• Mountain flank deposits of submarine volcanos and volcanic islands on Tanzawa mass
• early Miocene (17 - ? Ma)

• Sedimentary facies: Marine
• Metamorphic facies: Prehnite-Pumpellyite
• Lithofacies: Subaqueous volcaniclastics, Subaqueous lavas
• Lithofacies: Epiclastic turbidite
• Lithofacies (Minor): Pumiceous turbidite

• Thickness: 2,000 m
• Upper limit: Conformity

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

• Distribution: Tanzawa mountains, Kanagawa pref.

• Ishikawa et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.7, pp.291-304, DOI
• Ueki et al. (2013) Geology of the Hachioji District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 137p. (in Japanese with English abstract 6p.)
• Matsubara and Amano (2010) Jour. Geol. Soc. Japan, vol.116, no.3, pp.134-150 DOI