Murono Formation

[ Top ] [ Japanese ]

Murono Formation Shiba and Suruga Bay Collaborative Research Group, 1986

Probably this should be redefined to Member of Hamaishidake Formation

Volcanic rocks
Trough basin (Fujikawa Trough) -fill deposit at the collision boundary between Izu-Bonin-Mariana arc and Southwest - East Japan island arc
Back-arc basin volcanic activity at the back-arc basin of Izu-Bonin-Mariana arc
late Miocene - Pliocene
Contemporaneous heterotopic facies: Sattatoge Formation

Sedimentary facies: Marine
Lithofacies: Andesite lava, Volcaniclastic rocks, Interbedded sandstone and mudstone

Thickness: 600 m or thicker

Hamaishidake Formation (West)
[ Upper ]
--------------
Okuyama Member / Kawaino Member
--------------
[ Lower ]

Hamaishidake Formation (East)
[ Upper ]
--------------
Ishiai Member
--------------
Kangatake Member
--------------
[ Lower ]

(Invalid name) Hamaishidake Group
[ Upper ]
--------------
Kawaino Formation
--------------
Nakagochi Formation
--------------
Utsugino Formation
--------------
Sattatoge Formation / Murono Formation
--------------
Kogochi Formation
--------------
[ Lower ]

Fujikawa Group (Central zone)
[ Upper ]
--------------
Hamaishidake Formation / Akebono Formation
--------------
Aimata Formation
--------------
Kuonji Formation
--------------
Hara Formation
--------------
[ Lower ]

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

Distribution: Murono, Yui town, Shizuoka city, Shizuoka pref.
Fossils (Shellfishes): Aequipecten cf. vesiculasus, Amussiopecten iitomiensis, Amussiopecten praesignis, Cardium sp., Chlamys sp., Clementia sp., Conus aff. tuberculosus, Corbicula cf. japonica, Glycymeris cf. nakamurai, Glycymeris cf. totomiensis, Lemintina muronoensis, Limaria cf. konnoi, Mizuhopecten sp., Ostrea aff. musashiana, Venericardia panda
Fossils (Foraminifera): Globigerinoides conglobatus, Globigerinoides elongatus, Globigerinoides obliquus extremus, Globigerinoides obliquus obliquus, Globigerinoides ruber, Globigerinoides sacculifer, Globigerinoides trilobus, Globorotalia crassaformis, Globorotalia inflata, Globorotalia tumida plesiotumida, Globorotalia tumida tumida, Neogloboquadrina asanoi, Neogloboquadrina pachyderma, Orbulina universa, Pulleniatina primalis, Sphaeroidinella dehiscens

Sugiyama and Shimokawa (1990) Geology of the Shimizu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 103p. (in Japanese with English abstract 8p.)