Horita Formation

[ Top ] [ Japanese ]

Horita Formation (Nakano, 1953) Yamasaki, 1986

Invalid name: Horita Sandstone

Coherent formation
Izumi sedimentary basin
Forearc basin associated with strike-slip fault related to Median Tectonic Line
Late Cretaceous

Lithofacies:

Thickness: 12,000 m
Lower limit: Bottom of the sandstone-dominant horizon including thick sandstone beds
Lower limit: Conformity (Hiketa Formation, Ashiro Mudstone Member)

Horita Formation
[ Upper ]
--------------
Katsuura Mudstone Member
--------------
Nagoro Sandstone Member
--------------
[ Lower ]

Main facies (Sanuki mountains, Tokushima pref.)
[ Upper ]
'''''''/,,,,,,
Bandodani Formation
--------------
Higaidani Formation
--------------
Horita Formation
--------------
Takikubo Formation
--------------
[ Lower ]

Izumi Group
[ North ]
~~~~~~~~~~~~~~
Northern marginal facies
~~~~~~~~~~~~~~
Main facies
~~~~~~~~~~~~~~
Southern facies
~~~~~~~~~~~~~~
[ South ]

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

Distribution: Horita, Manno city, Nakatado county, Kagawa pref.

Noda et al. (2021) Geology of the Ikeda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 150p. (in Japanese with English abstract 5p.)
Noda et al. (2017) Geology of the Kan-onji District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 96p. (in Japanese with English abstract 4p.)
Kikuchi and Kotake (2013) Jour. Geol. Soc. Japan, vol.119, no.9, pp.613-629 DOI