On-Kt Tephra

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On-Kt Tephra Takemoto et al., 1987

Abbr.: On-Kt

Invalid synonym: KtP, Pm-2B

Tephra
Pleistocene (ca. 75 - 65 ka)
Correlation: JH

Lithofacies: Pumice bed
Distribution axis: North-northeast

Source: Mamahahadake volcano group
Thickness: 80 cm
Host: Katamachi Sand Bed, Banjin Sand, Middle II Terrace Deposit

On-Pm2'
[ Upper ]
~~~~~~~~~~~~~~
OtP
--------------
InP
--------------
On-Kt
~~~~~~~~~~~~~~
[ Lower ]

Mamahahadake volcano group (Younger Ontake Tephra Group
[ Upper ]
~~~~~~~~~~~~~~
On-Fk
~~~~~~~~~~~~~~
On-Pm3
~~~~~~~~~~~~~~
On-Pm3'
~~~~~~~~~~~~~~
On-Pm2'
~~~~~~~~~~~~~~
On-Pm2
~~~~~~~~~~~~~~
On-Pm1
~~~~~~~~~~~~~~
On-Pm1'
~~~~~~~~~~~~~~
[ Lower ]

Younger Ontake Volcanic Rocks
[ Upper ]
~~~~~~~~~~~~~~
Marishiten volcano group
~~~~~~~~~~~~~~
Takigoshi Formation
~~~~~~~~~~~~~~
Mamahahadake volcano group
~~~~~~~~~~~~~~
[ Lower ]

Ontake volcano
[ Upper ]
~~~~~~~~~~~~~~
Younger Ontake Volcanic Rocks
~~~~~~~~~~~~~~
Older Ontake Volcanic Rocks
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Okata ward, Joetsu city, Niigata pref.; Nomugitoge pass, Takane town, Takayama city, Gifu pref.

Nakano et al. (1995) Geology of the Norikuradake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 139p. (in Japanese with English abstract 4p.)
Kobayashi et al. (1995) Geology of the Kashiwazaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 102p. (in Japanese with English abstract 4p.)
Akahane and Kato (1989) Geology of the Takada-Seibu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 89p. (in Japanese with English abstract 3p.)
Yamada and Kobayashi (1988) Geology of the Ontakesan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 136p. (in Japanese with English abstract 9p.)