Ko-d Tephra

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Ko-d Tephra

Abbr.: Ko-d

Type locality: Mount Komagatake, Hokkaido
Tephra
Holocene (1640 AD, ¹⁴C; July 31st, 1640 - ca. 70 days)

Lithofacies: Pumice fall deposit, Pyroclastic flow deposit

Mode of eruption: Plinian associated with pyroclastic flow deposit (3 fall units)
Eruptive volume: 1.0 km³ DRE
Eruptive volume (Pumice): 2.3 km³
Eruptive volume (Pyroclastic flow): 0.6 km³
Lower limit: Unconformity (P1)

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
Distribution: Nashinokisawa creek, Mori city, Kayabe county, Hokkaido; Cape Dekima, Shikabe city, Kayabe county, Hokkaido; Tomenosawa creek, 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