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Hottai Lava (Hayashi, 1984) Nakano and Tsuchiya, 1992
Invalid synonym: Lower Akazawagawa Lava
- Stratovolcano
- West Chokai edifice and flank volcano
- Volcanic rocks
- Pleistocene
- Lithofacies: Calc-alkaline
- Lithofacies: Hornblende hypersthene olivine augite andesite
- Lithofacies: Lava (A flow unit)
- Thickness: 50 - 100 m ro thicker
- Upper limit: Unconformity (Jorozawagawa Lava)
- Lower limit: Unconformity (Alluvial fan deposit)
- Stage IIc
- [ Upper ]
- ~~~~~~~~~~~~~~
- Hottai Lava
- ~~~~~~~~~~~~~~
- [ Lower ]
- Stage II
- [ Upper ]
- ~~~~~~~~~~~~~~
- Stage IIc
- ~~~~~~~~~~~~~~
- Formation of West Chokai horseshoe-shaped caldera
- ~~~~~~~~~~~~~~
- Stage IIb
- ~~~~~~~~~~~~~~
- Stage IIa
- ~~~~~~~~~~~~~~
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Shimotamata river - Akazawa river - Hottai fall, Chokai town, Yurihonjo city, Akita pref.
- Nakano and Tsuchiya (1992) Geology of the Chokaisan and Fukura District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 138p. (in Japanese with English abstract 7p.)