Where: Japan (37.0° N, 140.9° E: paleocoordinates 43.0° N, 137.7° E)
• coordinate stated in text
• outcrop-level geographic resolution
When: Asagai Formation (Shirimazu Group), Late/Upper Oligocene (28.4 - 23.0 Ma)
• LITHOSTRATIGRAPHY: From the Asagai Fm of the Shirimazu Gp.. AGE: Late Oligocene. STRATIGRAPHIC POSITION: From unknown position within formation.
• group of beds-level stratigraphic resolution
Environment/lithology: marine; fine-grained sandstone
Size class: microfossils
Collected by Asano
Collection methods: sieve,
• COLLECTOR: K. Asano. REPOSITORY Institute of Geology and Paleon- tology, Tohoku University, Sendai..
Primary reference: K. Asano. 1949. Foraminifera from the Asagai Formation (Tertiary) of Fukushima Prefecture, Japan. Journal of Paleontology 23(5):473-478 [A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 91371: authorized by Austin Hendy, entered by Austin Hendy on 16.09.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
Globothalamea | |
Cibicides sp. Monfort 1808 | |
? Faujasina sp. d'Orbigny 1839 | |
Foraminifera | |
Ammobaculites yumotoensis n. sp. Asano 1949
Cyclammina cf. incisa Stache 1864 | |
Nodosariata | |
Lenticulina fukushimaensis n. sp. Asano 1949
? Saracenaria sp. Defrance 1824 | |
Foraminifera | |
Trochammina asagaiensis n. sp.
Trochammina asagaiensis n. sp. | |
Elphidium yumotoense n. sp., Elphidium asagaiense n. sp.
Elphidium yumotoense n. sp. Asano 1949
Elphidium asagaiense n. sp. Asano 1949 |