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Hr-FP Tephra

Abbr.: Hr-FP

Invalid synonym: FP, Hr-I

• Type locality: Sogo park, Shibukawa city, Gunma prefecture
• Tephra
• Holocene (late 6th century - early 7th century; 555 - 615 AD, ¹⁴C)

• Lithofacies: Pyroclastic flow deposit, Pyroclastic fall deposit

• Source: Haruna volcano
• Thickness: ca. 2 - 7 cm
• Lower limit: Unconformity (Somayama Lava, Mizusawayama Lava)

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

• Distribution: Sogo park, Shibukawa city, Gunma pref.; Lake Tsurugaike - Mount Kashiyama - Yunokami - Ouchi, Shimogo city, Minamiaizu county, Fukushima pref.

• Kubo et al. (2015) Geology of the Kawamata District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 86p. (in Japanese with English abstract 4p.)
• Geshi and Takeuchi (2012) Geology of the Haruna San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 79p. (in Japanese with English abstract 3p.)
• Yamamoto (1999) Geology of the Tajima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 85p. (in Japanese with English abstract 8p.)