Ko-c1 Tephra

[ Top ] [ Japanese ]

Ko-c1 Tephra

Abbr.: Ko-c1

Type locality: Mount Komagatake, Hokkaido
Tephra
Holocene (1856 AD, ¹⁴C; September 25th, 1856 - ca. a month)

Sedimentary facies: Lava dome
Lithofacies: Pumice fall deposit, Pyroclastic flow deposit, Lava (3 - 5 fall units)

Mode of eruption: Plinian associated with pyroclastic flow deposit
Eruptive volume (Pumice): 0.2 km³
Eruptive volume (Pyroclastic flow): 0.1 km³ DRE

Stage IV
[ Upper ]
~~~~~~~~~~~~~~
1942
~~~~~~~~~~~~~~
Ko-a
~~~~~~~~~~~~~~
Ko-c1
~~~~~~~~~~~~~~
Ko-c2
~~~~~~~~~~~~~~
Ko-d
~~~~~~~~~~~~~~
Kurumizaka Debris Avalanche Deposit
~~~~~~~~~~~~~~
[ Lower ]

Komagatake volcano
[ Upper ]
+--+--+--+--+-
Stage IV
~~~~~~~~~~~~~~
Stage III
~~~~~~~~~~~~~~
Stage II
~~~~~~~~~~~~~~
Stage I
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Mount Komagatake, Hokkaido; Mount Chacha, Kunashiri island, Hokkaido
Distribution: Cape Dekima, Shikabe city, Kayabe county, Hokkaido

Yoshimoto et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.7, pp.336-347 DOI
Yoshimoto et al. (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.81-92 DOI