Yumoto [Asagai Fm]: Late/Upper Oligocene, Japan
collected by Asano

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Nodosariata - Vaginulinida - Vaginulinidae
Lenticulina fukushimaensis n. sp. Asano 1949
R category
? Saracenaria sp. Defrance 1824
R category
Lituolida - Lituolidae
Ammobaculites yumotoensis n. sp. Asano 1949
R category
Cyclammina cf. incisa (Stache 1864)
U category
Elphidiidae
Elphidium yumotoense n. sp. Asano 1949
C category
Elphidium asagaiense n. sp. Asano 1949
U category
Trochamminidae
Trochammina asagaiensis n. sp.
C category
Globothalamea - Rotaliida - Nonionidae
Nonion cf. boueanum
R category
? Faujasina sp. d'Orbigny 1839
R category
Globothalamea - Rotaliida - Cibicididae
Cibicides cf. lobatulus
R category
Cibicides sp. Monfort 1808
R category
see common names

Geography
Country:Japan
Coordinates: 37.0° North, 140.9° East (view map)
Paleocoordinates:43.0° North, 137.7° East
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Oligocene
Stage:Chattian 10 m.y. bin:Cenozoic 4
Key time interval:Late/Upper Oligocene
Age range of interval:27.82000 - 23.03000 m.y. ago
Stratigraphy
Geological group:Shirimazu Formation:Asagai
Stratigraphic resolution:group of beds
Stratigraphy comments: LITHOSTRATIGRAPHY: From the Asagai Fm of the Shirimazu Gp.. AGE: Late Oligocene. STRATIGRAPHIC POSITION: From unknown position within formation.
Lithology and environment
Primary lithology:fine sandstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Fine-grained sandstone. LITHIFICATION: Unknown.
Environment:marine indet.
Geology comments: ENVIRONMENT: Not stated, but apparently shallow marine siliciclastic.
Taphonomy
Modes of preservation:body
Size of fossils:microfossils
Collection methods and comments
Collection methods:sieve,field collection
Reason for describing collection:taxonomic analysis
Collectors:Asano
Collection method comments: COLLECTOR: K. Asano. REPOSITORY Institute of Geology and Paleon- tology, Tohoku University, Sendai..
Taxonomic list comments:COVERAGE: Exhaustive for foraminifera. NOMENCLATURE: Authoritative publication, with somewhat modern nomenclature, and species resolution identifications.
Metadata
Database number:91371
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:micropaleontology
Created:2009-09-16 18:03:04 Last modified:2013-11-25 13:37:23
Access level:the public Released:2009-09-16 18:03:04
Creative Commons license:CC BY
Reference information

Primary reference:
30745. K. Asano. 1949. Foraminifera from the Asagai Formation (Tertiary) of Fukushima Prefecture, Japan. Journal of Paleontology 23(5):473-478 [A. Hendy/A. Hendy]