Hiedayama-Jobu Lava

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Hiedayama-Jobu Lava Nakano et al., 2002

Volcanic rocks
Pleistocene (0.8 - 0.7 Ma)

Lithofacies: Olivine hornblende-bearing hypersthene augite andesite lava (more than 10 flow units)

Source: west of Mount Hiedayama
Thickness: 200 m or thicker
Lower limit: Unconformity (Hiedayama-Kabu Lava)

Older stage
[ Upper ]
~~~~~~~~~~~~~~
Gamaharayama Lava
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Norikurazawa Lava
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Hiedayama-Jobu Lava
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Hiedayama-Kabu Lava
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[ Lower ]

Shirouma-Oike volcano
[ Upper ]
+__+__+__+__+_
Younger stage
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Older stage
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[ Lower ]

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

Distribution: Nagano pref.

Nagamori et al. (2010) Geology of the Kotaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 130p. (in Japanese with English abstract 4p.)
Nakano et al. (2002) Geology of the Shiroumadake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 105p. (in Japanese with English abstract 5p.)