Fujimiyama Formation

[ Top ] [ Japanese ]

Invalid synonym: Oyanagawa Formation

Type locality: Nashikizawa - Jikkoku pass, Fujikawa city, Minamikoma county, Yamanashi prefecture
Coherent formation
Miocene

Sedimentary facies: Marine
Lithofacies (Top): Andesite - Basalt reworked volcanic breccia, Lapilli tuff, Tuff
Lithofacies (Top, Minor): Volcanic conglomerate, Tuffaceous sandstone, Mudstone
Lithofacies (Upper): Mudstone-dominant interbedded sandstone and mudstone
Lithofacies (Middle): Sandstone-dominant interbedded sandstone and mudstone
Lithofacies (Lower): Andesite - Basalt reworked volcanic breccia, Lapilli tuff, Tuff
Lithofacies (Lower, Minor): Volcanic conglomerate, Tuffaceous sandstone, Mudstone
Sedimentary structures (Upper): Slump structures
Sedimentary structures (Middle): Slump structures
Sedimentary structures (Lower): Upward fining

Thickness: 1,500 m or thicker
Upper limit: Unconformity (Mogura Formation)
Lower limit: Conformity (Jikkoku Formation)

Kushigatayama Subgroup (Western part)
[ Upper ]
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Arakura Formtion
~~~~~~~~~~~~~~
[ Lower ]

Kushigatayama Subgroup (Eastern part)
[ Upper ]
~~~~~~~~~~~~~~
Fujimiyama Formation
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Jikkoku Formation
~~~~~~~~~~~~~~
[ Lower ]

Koma Group
[ Upper ]
~~~~~~~~~~~~~~
Momonoki Subgroup
-------~~~~~~~
Kushigatayama Subgroup
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Nashikizawa - Jikkoku pass - Mount Gotenyama - Mount Fujimiyama, Fujikawa city, Minamikoma county, Yamanashi pref.
Fossils (Foraminifera): Anomalina? sp., Bathysiphon sp., Bulimina spp., Cibicides spp., Cibicidoides pseudoungerianus, Cribrostomoides subglobosum, Dentalina sp., Eggerella sp., Elphidium cf. crispum, Epistominella aff. levicula, Epistominella pulchella, Globigerinoides immaturus, Globigerinoides quadrilobatus, Globobulimina spp., Globoquadrina dehiscens, Globoquadrina venezuelana, Globorotalia archeomenardii, Globorotalia fohsi lobata, Globorotalia siakensis, Gyroidina orbicularis, Gyroidina soldanii, Lagena sp., Melonis cf. barleeanum, Melonis cf. pompilioides, Oolina sp., Orbulina bilobata, Orbulina universa, Oridosalis umbonatus, Planulina wuellestorfi, Sphaeroidinellopsis disjuncta, Stilostomella spp., Textularia conica, Trochammina spp.

Ozaki and Sugiyama (2018) Geology of the Minobu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 169p. (in Japanese with English abstract 7p.)