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田野沢層 柴山, 1929 ex 半沢ほか

たのさわ

Tanosawa Formation Shibayama, 1929 ex Hanzawa et al.

別名 (無効): 追良瀬層 (おいらせ), 深浦層 (ふかうら)

層状マンガン鉱床の母岩

• 模式地: 青森県 西津軽郡 深浦町 田野沢 (たのさわ) - 貝良木 (かいらぎ) - 追良瀬川 (おいらせがわ) 河口
• 整然層
• 中期 中新世 (17 - 16 Ma, 珪藻)
• 被貫入: 安山岩 岩脈, 流紋岩 岩脈
• 対比: 黒崎層?

• 堆積相: 浅海 (貝, 珪藻, 有孔虫)
• 堆積相: 広く開いた湾 (貝)
• 堆積相: 潟湖, 内湾, 外洋
• 堆積相: 海進
• 堆積相: 水中火砕流
• 水温: 温暖 (有孔虫)
• 岩相: 礫岩, 砂岩, 泥岩
• 岩相 (最下部): 基底礫岩
• 岩相 (少量): 石灰岩, 流紋岩質 - 安山岩質 火山礫凝灰岩, 軽石凝灰岩, 凝灰質砂岩

• 層厚: 100 - 1,000 m
• 上限: 整合, 一部不整合 (大童子層), 整合 (赤石層)
• 下限: 不整合 (小浜館沢 安山岩部層, 吾妻川 流紋岩部層)

------ 整合, ~~~~~~ 不整合, ~~~--- 部分不整合, '''/,, 指交, :::::: 断層, /--/-- 衝上断層, +__+__ 地表, ?--?-- 不明

• 分布: 青森県 西津軽郡 深浦町 田野沢 (たのさわ) - 貝良木 (かいらぎ) - 追良瀬川 (おいらせがわ) 河口, 青森県 西津軽郡 深浦町 北金ヶ沢 (きたかねがさわ) - 小童子川 (こどうじがわ) - 大童子川 (おどうじがわ), 青森県 西津軽郡 鰺ヶ沢町 大然 (おおじかり) - 松代 (まつだい), 青森県 西津軽郡 深浦町 岩崎 帆立沢 (ほたてざわ)
• 化石: サンゴ (Dendrophyllia koiwai), 珪化木, 植物, 腕足貝, サメ (歯)
• 化石 (ウニ): Moira obesa, Astriclypeus ambigenus, Ehinolampas yoshiwara
• 化石 (貝): Acila yanagawaensis, Acmaea sp., Anadara kakehataensis, Anadara kurosedaniensis, Anadara cf. ninohensis, Anadara ogawai, Anadara sp., Anisocorbula? sp., Anomia cfr. cytaeum, Arca (Arca) sp., Calyptoraea tokunagai, Cancellaria spengleriana, Cardita sp., Cardium (Cerastoderma) shinjiense, Cardium (Trachycardium) sp., Cerithidea sp., Chama sp., Chicoreus sp., Chione? sp., Chlamys akitana, Chlamys arakawai, Chlamys cosibensis, Chlamys hataii, Chlamys heteroglyptus, Chlamys cf kaneharai, Chlamys cfr. islandious, Chlamys nisataiensis, Chlamys sp., Clementia brevitesta, Clementia cf. iizukai, Clinocardium cf. shinjiense, Dentalium tigillum, Dentalium weinkaufii, Dentalium yokoyamai, Dosinia akaishiana, Dosinia nomurai, Dosinia odosensis, Dosinia sp., Euspira meisensis, Glycymeris oinouyei, Glycymeris cfr. cisshuensis, Glycymeris vestitoides, Lima sp., Limopsis sp., Lucinoma acutilineatum (= Lucina (Myrtea) acutilineata), Lucinoma otukai, Lucinisca k-hataii, Macoma aomoriensis, Macoma incongrua, Macoma oinomikadoi, Macoma optiva, Macoma tokyoensis, Mactra (Spisula) sp., Mercenaria? sp., Mitra? sp., Mizuhopencten kimurai murayamai (= Patinopecten kimurai murayamai), Mizuhopecten kimurai ugoensis, Mizuhopecten yamazakii iwasakiensis, Murex tiganourana, Mya arenaria, Mya cuneiformis, Mya urushikuboana, Nassarius kometubus, Nassarius cf. notoensis, Natica (Tectonatica) janthostoma, Neilonella? sp., Nuculana confusa, Ostrea gravitesta, Ostrea musashiana, Ostrea rosacea, Ostrea sp., Panope japonica, Panope cf. kanomatazawaensis, Panomya simotomensis, Paphia hirabayashi, Patinopecten akihoensis, Patinopecten kimurai, Patinopecten nakajimai, Patinopecten cfr. paraplebejus, Patinopecten protomallitus, Pecten (Pallium) turpiculvs, Pecten (Pallium) swiftii, Pecten (Patinopecten) kimurai, Pecten (Patiopecten) yamasakii, Pecten (Pecten) arakawai, Pecten (Pecten) imasakiensis, Pecten ingeniosa, Pecten (Pecten) porotomollitus, Pedalion tugaruense, Pitar itoi, Placopecten nomurai, Placopecten protomollites, Pododesmus macroshisma, Protothaca tateiwai, Sakidomus giganteus, Saccella kongiensis, Serripes cf. shiobaraensis, Siliqua sp., Sinum yabei, Solen tanosawaensis, Tapes siratoriensis, Tellina? sp., Terebra sp., Thracia pertrapezoidea, Thracia sp., Thyasira nipponica, Turritella tanaguraensis, Venericardia ferruginea, Venericardia siogamensis, Venus (Chione) securis, Vicarya cf. callosa japonica, Yoldia (Cnesterium) sp.
• 化石 (有孔虫): Operculina complanata, Operculina complanata japonica, Miogypsina kotoi, Robulus calcar, Nodosaria raphanus, Vaginulina bradyi, Vaginulina yoshihamaensis, Nonion kidoharaense, Nonion japonicum, Nonion nakosoensis, Nonion nicobarense, Rotalia cf. beccarii, Rotalia tochigiensis, Rotalia tanosawaensis, Rotalia beccarii hatatatensis, Rotalia japonica, Rotalia takanabenensis, Bolivina marginata, Bolivina robusta, Cassidulina laeirgata carinata, Cassidulina margareta, Cassidulina yabei, Cibicides aknerianus, Cibicides lobatulus, Cibicides pseudoungerianus, Cibicides cf. refulgens, Dentalina emaclata, Dentalina hyugaensis, Discopulirnulina bradyi, Discopulirnulina cf. nitida, Discopulirnulina sp., Discorbis? sp., Ellipsonodosaria hayasakai, Elphidiella momiyamaensis, Epistominella japonica, Eponides haidingeri, Eponides tanai, Eponides umbonatus, Globulina gibba, Guttulina baileyi, Gyroidina nipponica, Gyroidina orbicularis, Hanzawaia nipponica, Lagenodosaria fukushimaensis, Lagenodosaria scalaris sagamiensis, Marginnlina aculeata, Marginnlina sendaiensis, Planulina nipponica, Robulus iotus, Robulus pseudo-rotulatus, Sigmomorphina sp., Stilostomella cf. lepidula, Globigerina angustumbilicata, Globigerina bulloides, Globigerina concinna, Globigerina cf. diplostoma, Globigerina druryi, Globigerina juveniles, Globigerina praebulloides, Globigerina woodi, Globigerina sp. Globigerinella sp., Globigerinoides cyclostomus, Globigerinoides trilobus, Globorotalia fohsi barisanensis, Globorotalia scitula praescitula, Globorotaliloides variabilis
• 化石 (珪藻, 海): Actinocyclus ingens, Actinoptychus senarius, Amphora sp., Arachnoidiscus sp., Biddulphia cfr. pulchella, Clavicula polymorpha, Cocconeis scutellum, Cocconeis sp., Coscinodiscus nitidus, Coscinodiscus symbolophorus, Coscinodiscus sp., Cymatosira sp., Endictya aceanica, Diploneis smithii, Diploneis sp., Isthmia sp., Hyalodiscus obsoletus, Hyalodiscus ukaiensis, Kisseleviella carina, Mastogloia splendida, Melosira sol, Navicula spp., Paralia sulcata, Rhaphoneis, miocenica, Rhaphoneis spp., Rhizosolenia miocenica, Rhizosolenia spp., Rossiella sp., Stephanogonia cfr. hanzawae, Stephanopyxis sp., Synedra jouseana, Thalassionema nitzschioides, Thalassiothrix longissima, Trachyneis aspera
• 化石 (珪藻, 淡水): Aulacosira granulata, Cymbella sp., Surirella sp.

• 坂井ほか (2019) 地質学雑誌, vol.125, no.4, pp.297-305 DOI
• 平山と上村 (1985) 鯵ヶ沢地域の地質, 地域地質研究報告 (5万分の1地質図幅), 地質調査所, 86p.
• 盛谷 (1968) 深浦地域の地質, 地域地質研究報告 (5万分の1地質図幅), 地質調査所, 57p.