Mitsugano Tuffaceous Siltstone and Sandstone Member

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Mitsugano Tuffaceous Siltstone and Sandstone Member Takimoto, 1935

Invalid synonym: Mitsugano Shale and Sandstone Member, Kamimitsugano Facies

Type locality: Shimomitsugano - Nihongi, Hakusan town, Tsu city, Mie prefecture
Coherent formation
Miocene sediments related to the paleo Setouchi inner sea
early Miocene

Sedimentary facies: Marine
Sedimentary facies: around the River mouth which supplied the sediments to lower strata
Water temperature: Subtropical (Foraminifera)
Depth of water: Upper bathyal (Shellfishes)
Lithofacies: Sandy siltstone, Siltstone
Lithofacies (Minor): Sandstone, Rhyolitic tuff
Sedimentary structures: Large scale planar cross-stratification
Paleocurrent: to East

Thickness: ca. 250 - 750 m
Upper limit: Transitional (Chaya Sandstone and Mudstone Member), Unconformity (Omitsu Gravel Bed)
Lower limit: Conformity (Iedokoro Sandstone Member, Ochiai Sandstone Facies)

Oi Formation (Main part)
[ Upper ]
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Mitsugano Tuffaceous Siltstone and Sandstone Member
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Iedokoro Sandstone Member
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[ Lower ]

Oi Formation (Marginal part)
[ Upper ]
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Mitsugano Tuffaceous Siltstone and Sandstone Member
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Ichiba Sandstone and Siltstone Member
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Kusawa Sandstone and Siltstone Member
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Oshida Conglomerate Member
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Mukodani Conglomerate Member
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[ Lower ]

Ichishi Group
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Katada Formation
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Oi Formation
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Ieki Formation
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Haze Formation
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[ Lower ]

First Setouchi Supergroup (Ichishi, Mie pref.)
[ Upper ]
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Ichishi Group
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[ Lower ]

[ Upper ]
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Second Setouchi Supergroup
?--?--?--?--?-
First Setouchi Supergroup
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[ Lower ]

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

Distribution: Hakusan town - Hisai - Misato town - Anno town - Geino town, Tsu city, Mie pref.
Fossils: Aturia minoensis, Pteropods (Vaginella sp.)
Fossils (Shellfishes): Acila (Acila) submirabilis, Acilana tokunagai, Cultellus izumoensis, Cryptonatica ichishiana, Cyclocardia siogamensis, Cyclodicama sp., Euspira meisensis, Glycymeris sp., Lucinoma acultilineatum, Macoma (Macoma) izurensis, Macoma (Macoma) optiva, Musashia (Nipponomelon) miensis, Naticidae, Poriploma (Aelga) mitsuganoense, Saccella miensis, Turritella sp.
Fossils (Foraminifera): Globigerina angustiumbilicata, Globigerina connecta, Globigerina falconensis, Globigerina foliata, Globigerina praebulloides praebulloides, Globigerina praebulloides pseudociperoensis, Globigerina woodi, Globigerinita glutinata, Globigerinoides qudrilobatus immaturus, Globigerinoides quadrilobatus trilobus, Globoquadrina altispira, Globoquadrina dehiscens, Globoquadrina venezuelana, Globorotalia mayeri, Globorotalia semivera, Globorotalia scitula praescitula, Globorotalia zealandica, Globorotaloides suteri, Neogloboquadrina continuosa, Paragloborotalia continuosa, Prosphaeroidinella disjuncta
Fossils (Diatoms): Thalassionema nitzschioides, Stephanopyxis spp., Kisseleviella carina

Oshida et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.11, pp.919-933 DOI
Yoshida et al. (1995) Geology of the Tsu-Seibu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 136p. (in Japanese with English abstract 6p.)