USGS 17481 - Chinen Sand Member, Ryukyu Group, Okinawa: Early/Lower Pliocene, Japan

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Argyropleura cf. divina
Gastropoda - Heterostropha - Ringiculidae
Ringicula (Ringiculella) musashinoensis
Gastropoda - Eucyclidae
Bathybembix cf. convexiusculum
Gastropoda - Solariellidae
"Solariella" albalitus
Gastropoda - Turritellidae
Turritella zinboi
Gastropoda - Neogastropoda - Columbellidae
Anachis (Costoanachis) leroyi
Gastropoda - Neogastropoda - Fasciolariidae
Fusinus perplexus
Gastropoda - Neogastropoda - Nassariidae
Nassarius (Niotha) caelatus
Gastropoda - Neogastropoda - Buccinidae
Hindsia (Nihonophos) okinavia
Siphonalia subspadicea Vredenburg 1921
Gastropoda - Neogastropoda - Mitridae
Mitra (Cancilla) yokoyamai
original and current combination Cancilla
Gastropoda - Neogastropoda - Clathurellidae
Etrema saplisi
Gastropoda - Neogastropoda - Terebridae
Terebra torquata
Gastropoda - Neogastropoda - Raphitomidae
Thatcheria cf. gradata
Buccinaria (Ootomella) loochooensis
Daphnella ryukyuensis
Gastropoda - Neogastropoda - Turridae
Unedogemmula cf. indica
Gemmula cf. granosa
Gastropoda - Neogastropoda - Ancillariidae
Ancilla (Baryspira) cf. albocallosa
spelled with current rank as Amalda (Baryspira)
Gastropoda - Neogastropoda - Costellariidae
Uromitra aff. obeliscus
Gastropoda - Neogastropoda - Volutidae
Fulgoraria aff. hirasei
Gastropoda - Neogastropoda - Muricidae
Murex saplisi
Gastropoda - Cassidae
Semicassis pila (Martin 1899)
synonym of Semicassis bisulcata
see common names

Geography
Country:Japan State/province:Okinawa
Coordinates: 26.3° North, 127.9° East (view map)
Paleocoordinates:26.6° North, 127.4° East
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Pliocene
Stage:Zanclean 10 m.y. bin:Cenozoic 6
Key time interval:Early/Lower Pliocene
Age range of interval:5.33300 - 3.60000 m.y. ago
Stratigraphy
Geological group:Ryukyu Member:Chinen Sand
Stratigraphic resolution:bed
Stratigraphy comments: This locality could be Shinzato Tuff. Lower sand units were formely included in the Shimajiri beds, but they are disconformable with the underlying Shimajiri Formation. The lower sandy and silty part of the Ryukyu Group is divided into two elements, the Nakoshi Sand and the Chinen Sand. Presumably the two members are equivalent in age, but they are laterally not related. The Chinen sand is light gray to dark gray and more uniformely fine than the Nakoshi, and can have fine silt partings.
Lithology and environment
Primary lithology:fine,gray unlithified silty sandstone
Includes fossils?Y
Lithology description: Light gray to dark gray, uniformely fine, can have fine silt partings.
Environment:marine indet.
Glacial or sequence phase:transgressive
Geology comments: Probably reworked Shimajiri material during a transgression. Its deposition was followed immediately by a period during which reefs flourished and large ares were strewn with reef detritus.
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
Collection method comments: Collections held in USNM and UGSG repositories.
Taxonomic list comments:Exhaustive for gastropoda. No bivalves.
Metadata
Also known as:RSWB (22-226-30)
Database number:42232
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-07-26 21:32:49 Last modified:2013-11-25 13:37:23
Access level:group members Released:2005-07-26 21:32:49
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]