Nishikurosawa Fm - Loc.# 3: Middle Miocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Scaphopoda - Dentaliida - Dentaliidae
A category
Gastropoda - Potamididae
Vicaryella sp. Yabe and Hatai 1938
R category
R category
Gastropoda - Cerithiidae
Cerithium sp. Bruguière 1789
R category
Gastropoda - Turritellidae
Turritella sp. Lamarck 1799
R category
Gastropoda - Naticidae
Euspira meisensis (Makiyama 1926)
R category
Gastropoda - Calyptraeidae
Calyptraea sp. Lamarck 1799
R category
Gastropoda - Neogastropoda - Nassariidae
A category
Gastropoda - Neogastropoda - Buccinidae
R category
Bivalvia - Protobranchia - Nuculanidae
R category
Saccella sp. Woodring 1925
C category
R category
Nuculana cf. confusa (Hanley 1860)
R category
Bivalvia - Arcida - Limopsidae
C category
Bivalvia - Arcida - Arcidae
c category
Bivalvia - Pectinida - Anomiidae
Monia macrochisma (Deshayes 1839)
R category
Bivalvia - Carditida - Carditidae
R category
Bivalvia - Cardiida - Cardiidae
A category
Clinocardium shinjiense (Yokoyama 1923)
C category
R category
R category
Bivalvia - Cardiida - Tellinidae
R category
A category
R category
Bivalvia - Adapedonta - Hiatellidae
Panopaea sp. (Menard 1807)
R category
Bivalvia - Adapedonta - Solenidae
C category
Bivalvia - Venerida - Cardiliidae
R category
Bivalvia - Venerida - Veneridae
Dosinia nomurai Otuka 1934
A category
R category
A category
R category
A category
C category
Bivalvia - Venerida - Ungulinidae
R category
Diplodonta sp. Bronn 1831
R category
Bivalvia - Pholadida - Corbulidae
R category
Bivalvia - Pholadida - Teredinidae
R category
see common names

Geography
Country:Japan
Coordinates: 39.7° North, 140.1° East (view map)
Paleocoordinates:39.5° North, 137.5° East (Wright 2013)
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Miocene
10 m.y. bin: Cenozoic 5
Key time interval: Middle Miocene
Age range of interval: 15.98 - 11.63 m.y. ago
Stratigraphy
Formation:Nishikurosawa
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Nishikurosawa Fm, which rests unconformably above the Daikima Flora of the Daijima Formation (Middle Miocene), and conformably below the Onnagawa Fm (Middle Miocene). THICKNESS: From restricted bed within formation of 20-100 m total thickness. AGE: Middle Miocene on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: From bed within lower part of the Nishikurosawa Fm.
Lithology and environment
Primary lithology:pebbly lithified silty,sandy,carbonaceous conglomerate
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Rounded pebble conglomerate intercalated with massive and compact silty sandstone with carbonaceous plant fragments. LITHIFICATION: Lithified, on the basis of facies description and preservation as molds and casts.
Environment:coastal indet.
Geology comments: ENVIRONMENT: No environmental data reported in text.
Taphonomy
Modes of preservation:body,cast,mold/impression
Degree of concentration:dispersed
Size of fossils:macrofossils
Preservation of anatomical detail:poor
Articulated whole bodies:many
Disassociated major elements:some
Fragmentation:occasional
Spatial resolution:autochthonous
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Collection method comments: COLLECTOR: K. Ogasawara. REPOSITORY: IGPS, Institute of Geology and Paleontology, Tohoku University.
Taxonomic list comments:COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: Authoritative publication with relatively current nomenclature and species-level assignments.
Metadata
Database number:70302
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2007-03-20 18:05:44 Last modified:2025-02-22 15:12:02
Access level:authorizer only Released:2007-03-20 18:05:43
Creative Commons license:CC0
Reference information

Primary reference:
23595. K. Ogasawara. 1973. Molluscan fossils from the Nishikurosawa Formation, Oga Peninsula, Akita Prefecture, Japan. Tohoku University, Science Report, 2nd ser. (Geol.), Special Volume (Hatai Memorial Volume) 6:137-155 [A. Hendy/A. Hendy]