Hebiki Unit

[ Top ] [ Japanese ]

Hebiki Unit Okubo and Horiguchi, 1969

Possibly a member of Kurosegawa Belt

Invalid synonym: Hebiki Formation

Type locality: Hebiki, Kanna city, Gunma prefecture
Accretionary complex
Deposition (Matrix): Early Jurassic (Radiolarians)
Accretion: Jurassic
Correlation: Yusugawa Unit

Sedimentary facies: Marine
Lithofacies: Mélange facies
Matrix: Shale
Exotic blocks (Crusts): Sandstone

Distribution (Width): ca. 1 - 2 km
Upper limit: Thrust fault
Lower limit: Thrust fault

Northern Chichibu Belt
[ Upper ]
/--/--/--/--/-
Sumaizuku Unit
/--/--/--/--/-
Hebiki Unit
/--/--/--/--/-
Kazahayatoge Unit
/--/--/--/--/-
Kamiyoshida Unit
/--/--/--/--/-
Kashiwagi Unit
/--/--/--/--/-
[ Lower ]

Chichibu Belt
[ Upper ]
/--/--/--/--/-
Kurosegawa Belt
/--/--/--/--/-
Northern Chichibu Belt
/--/--/--/--/-
Southern Chichibu Belt
/--/--/--/--/-
[ Lower ]

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

Distribution: Hebiki - Kagahara - Sozugawa river - Sebayashi, Kanna city, Tano county Gunma pref.
Fossils: Radiolarians

Hisada et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.7, pp.325-342, DOI
Okubo and Horiguchi (1969) Geology of the Mamba District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 65p. (in Japanese with English abstract 5p.)