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Shichinohe Terrace Deposits Kudo, 2005

Invalid synonym: Sanbongi Formation (a part), Numazaki Formation (a part)

• Type locality: Kabasawa, Towada city, Aomori prefecture
• Coherent formation
• Pleistocene (ca. 70 - 30 ka?)

• Sedimentary facies: Lacustrine
• Lithofacies: Sands, Gravels
• Lithofacies (Minor): Mud
• Lithofacies (East): Mud
• Lithofacies (East, Minor): Sands, Gravels
• Sedimentary structures: Parallel stratification, Trough cross-stratification

• Thickness: 0 - ca. 40 m
• Upper limit: Unconformity (Towada Hachinohe Pyroclastic Flow Deposit)
• Lower limit: Unconformity (Noheji Formation)

• Distribution: Shichinohe face, Aomori pref.
• Distribution: Kabasawa - Sawada - Horanai - Odamichi - Mimakizawa - Matoji - Higuchi, Towada city, Aomori pref.
• Fossils: Plants (Fragments, Seeds)
• Fossils (Diatoms): Amphora persusilla, Cocconeis sp., Cyclotella bodanica, Cyclotella comta, Cymbella aequalis, Cymbella affinis, Cymbella cymbiformis, Cymbella ehrenbergii, Cymbella gracilis, Cymbella naviculiformis, Cymbella parva, Cymbella turgida, Denticula sp., Diatoma sp., Diploneis ovalis, Diploneis cfr. pseudovalis, Diploneis smithii, Epithemia turgida, Epithemia zebra var. saxonica, Eunotia arcus, Eunotia fava, Eunotia formica, Eunotia pectinalis, Eunotia pseudopectinalis, Fragilaria construens, Fragilaria lapponica, Fragilaria pinnata, Fragilaria sp., Gomphonema acuminatum var. coronata, Gomphonema constrictum, Gomphonema cfr. olivaceum, Gomphonema constrictum var. capitata, Melosira distans, Melosira granulata, Melosira granulata var. muzzanensis, Melosira italica, Navicula cryptocephala, Navicula tuscula, Navicula pupula var. retanglaris, Navicula radiosa, Navicula reinhardtii, Navicula subtilissima, Neidium iridis forma vernalis, Nitzschia cfr. amphibia, Nitschia filijormis, Nitzschia tryblionella, Nitzschia sp., Pinnularia brevicostata, Pinnularia gibba var. mesogyngyla, Pinnularia major, Pinnularia subsolaria, Pinnularia viridis, Rhopatodia gibberula, Stauroneis phoenteron, Surirella angustata, Surirella ovata, Surirella robusta, Surirella sp., Synedra miniscula, Synedra ulna, Tabellaria fenestrata, Tabellaria sp.

• Kudo (2005) Geology of the Towada District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 79p. (in Japanese with English abstract 3p.)