USGS 17679 - Okinawa: Pliocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Heterostropha - Architectonicidae
Architectonica perspectiva (Linnaeus 1767)
Architectonica maxima (Philippi 1849)
recombined as Architectonica (Architectonica) maxima
Architectonica (Solariaxis) dilecta (Deshayes 1863)
Gastropoda - Neritidae
Nerita chamaeleon Linnaeus 1758
recombined as Nerita (Theliostyla) chamaeleon
Gastropoda - Turritellidae
Orectospira cf. babelica
Gastropoda - Naticidae
Polinices cf. cumingianus
Subspecies: Polinices cf. cumingianus madioensis
Gastropoda - Neogastropoda - Buccinidae
Siphonalia yonabaruensis
? Pisania sp. Bivona-Bernardi 1832
Gastropoda - Neogastropoda - Ancillariidae
Ancilla (Baryspira) cf. albocallosa
spelled with current rank as Amalda (Baryspira)
Gastropoda - Neogastropoda - Turridae
Lophiotoma leucotropis
Gemmula aff. asukana
Gastropoda - Neogastropoda - Conidae
Conus aff. raphanus
Conus mucronatus
Gastropoda - Neogastropoda - Volutidae
Lyria aff. hirugaensis
Gastropoda - Neogastropoda - Muricidae
Chicoreus (Siratus) aff. anuliferous
see common names

Geography
Country:Japan State/province:Okinawa
Coordinates: 26.2° North, 127.8° East (view map)
Paleocoordinates:26.5° North, 127.3° East
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Pliocene
10 m.y. bin:Cenozoic 6
Key time interval:Pliocene
Age range of interval:5.33300 - 2.58000 m.y. ago
Stratigraphy
Geological group:Shimajiri Formation:Yonabaru
Stratigraphic resolution:bed
Stratigraphy comments: The Yonabaru Clay includes all Shimajiri Formation exposed below the upper tuffaceous pumiceous zone. Yonabaru Mudstone (now a formation) spans calcareous nannofossil zones CN10b to middle of CN12b and planktonic foram zones PL1 to PL4 (Ujiié, 1994), indicating an age of primarily Pliocene (but ranging from latest Messinian to possibly early Gelasian).
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:WF 278
Database number:42166
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:M. Clapham Research group:marine invertebrate
Created:2004-07-25 19:55:41 Last modified:2017-12-03 12:31:03
Access level:group members Released:2005-07-25 19:55:41
Creative Commons license:CC BY
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]