USGS 17449 - Okinawa: Late Miocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Solariellidae
Gastropoda - Trochidae
Gastropoda - Turritellidae
Gastropoda - Cypraeidae
Gastropoda - Naticidae
Gastropoda - Triviidae
Gastropoda - Neogastropoda - Turbinellidae
? Vasum sp. Röding 1798
Gastropoda - Neogastropoda - Nassariidae
Gastropoda - Neogastropoda - Olividae
Gastropoda - Neogastropoda - Vasidae
Gastropoda - Neogastropoda - Buccinidae
Gastropoda - Neogastropoda - Columbellidae
Gastropoda - Neogastropoda - Mitridae
Gastropoda - Neogastropoda - Drilliidae
Gastropoda - Neogastropoda - Turridae
Gastropoda - Neogastropoda - Conidae
Conus cf. litteratus Linnaeus 1758
Gastropoda - Neogastropoda - Olividae
Gastropoda - Neogastropoda - Costellariidae
Gastropoda - Tonnidae
Gastropoda - Naticidae
Euspira cf. pallida (Broderip and Sowerby 1829)
Gastropoda - Heterostropha - Architectonicidae
Gastropoda - Heterostropha - Pyramidellidae
see common names

Geography
Country:Japan State/province:Okinawa
Coordinates: 26.2° North, 127.7° East (view map)
Paleocoordinates:
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Miocene
10 m.y. bin: Cenozoic 6
Key time interval: Late Miocene
Age range of interval: 11.63 - 5.333 m.y. ago
Stratigraphy
Formation:Shimajiri Member:Yonabaru Clay
Stratigraphic resolution:bed
Stratigraphy comments: The Yonabaru Clay includes all Shimajiri Formation exposed below the upper tuffaceous pumiceous zone. The Yonabaru consists of bluish to gray silty to sandy clay, commonly with hackly to conchoidal fracture and fine dark-colored laminated to massive sand, weathering brown to gray, and in places contains large lime indurated concretions of sand. Most macrofossils are found in sandy beds intercalated with the clays. The Yonabaru passes under the cover of the basal gravels of the Naha limestone, and lap onto or are faukted against Paleozoic basement rocks.
Lithology and environment
Primary lithology: poorly lithified silty,sandy claystone
Secondary lithology:planar lamination,concretionary,brown,gray sandstone
Includes fossils?Y
Includes fossils?Y
Lithology description: Bluish to gray silty to sandy clay, commonly with hackly to conchoidal fracture and fine dark-colored laminated to massive sand, weathering brown to gray, and in places contains large lime indurated concretions of sand.
Environment:deep-water indet.
Geology comments: Molluscs found in assemblages of the Yonabaru Clay indicate moderately shallow to moderately deep water. Probably a depth of less than 100 fathoms in shallow facies and probably not more than 300 fathoms in deeper facies.
Taphonomy
Modes of preservation:body,original aragonite
Size of fossils:macrofossils
Collection methods and comments
Collection methods:selective quarrying,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Collection method comments: Collections held in USNM and UGSG repositories.
Taxonomic list comments:Exhaustive for gastropoda.
Metadata
Also known as:RS 270
Database number:42173
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-07-25 20:00:15 Last modified:2025-02-22 15:12:02
Access level:group members Released:2005-07-25 20:00:15
Creative Commons license:CC0
Reference information

Primary reference:
7337. F. S. MacNeil. 1960. Tertiary and Quaternary Gastropoda of Okinawa: A comparison of the late Miocene, Pliocene, and Pleistocene Gastropoda of Okinawa with related faunas of East Asia together with a resume of the geological setting of the fossiliferous deposits. United States Geological Survey Professional Paper 339:1-148 [A. Miller/C. Ferguson/P. Wagner]