[ Top ] [ Japanese ]

Initial volcanic edifice

• Type locality: Mount Azumaya, Nagano prefecture - Mount Agatsuma, Gunma prefecture
• Volcanic rocks
• early - Middle Pleistocene (0.8 - 0.55 Ma)

• Source: Azumaya caldera
• Upper limit: Unconformity
• Lower limit: Unconformity

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

• Distribution: Mount Azumaya, Nagano pref. - Mount Agatsuma, Gunma pref.

• Takeshita et al. (2015) Jour. Geol. Soc. Japan, vol.121, no.7, pp.233-248, DOI
• Nishiki et al. (2014) Jour. Geol. Soc. Japan, vol.120, no.3, pp.89-103 DOI