USGS 17440 - Nakoshi Sand, Ryukyu Group, Okinawa: Early/Lower Pliocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Trosatrochus attenuatus
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Gastropoda
- Turbinidae
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Marmorostoma (Batillus) gemmata
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Marmorostoma (Batillus) cf. cornuta
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Lunatica marmorata
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spelled with current rank as Turbo (Lunatica) | ||||||||||
Calcar sp.
Montfort 1810
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Gastropoda
- Trochidae
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Umbonium aff. costatum
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Stomatella cf. lyrata
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Gastropoda
- Cerithiidae
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Cerithium (Proclava) turritum
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spelled with current rank as Rhinoclavis (Proclava) | ||||||||||
Gastropoda
- Turritellidae
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Turritella filiola
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Gastropoda
- Pseudomelaniidae
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Crassispira pseudoprincipalis
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Gastropoda
- Strombidae
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Strombus (Lambiostrombus) cf. japonicus
Reeve 1851
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recombined as Strombus (Doxander) vittatus japonicus | ||||||||||
Gastropoda
- Neogastropoda
- Buccinidae
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Siphonalia aff. dainitiensis
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Gastropoda
- Neogastropoda
- Nassariidae
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Nassarius (Niotha) caelatus
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Nassarius (Niotha) gemmulatus
(Lamarck 1822)
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synonym of Nassarius (Niotha) variegatus | ||||||||||
Gastropoda
- Neogastropoda
- Fasciolariidae
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Fusinus cf. nodosoplicatus
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Gastropoda
- Neogastropoda
- Conidae
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Conus cf. eburneus
Bruguière 1792
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Gastropoda
- Neogastropoda
- Costellariidae
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Pusia cf. emmae
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original and current combination Vexillum (Pusia) | ||||||||||
Uromitra aff. lirocostata
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Gastropoda
- Cassidae
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Semicassis pila
(Martin 1899)
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synonym of Semicassis bisulcata | ||||||||||
Gastropoda
- Bursidae
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Bursa (Bufonaria) rana
(Linnaeus 1758)
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recombined as Bufonaria (Bufonaria) rana | ||||||||||
Gastropoda
- Xenophoridae
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Tugurium exutum
(Reeve 1842)
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recombined as Stellaria (Onustus) exutus | ||||||||||
Gastropoda
- Naticidae
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Polinices cf. cumingianus
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Subspecies Polinices cf. cumingianus madioensis | ||||||||||
Gastropoda
- Heterostropha
- Architectonicidae
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Architectonica perspectiva
(Linnaeus 1767)
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see common names |
Geography
Country: | Japan | State/province: | Okinawa |
Coordinates: | 26.6° North, 128.1° East (view map) | ||
Paleocoordinates: | 26.9° North, 127.5° 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: | Nakoshi Sandstone | ||
Local section: | Nakoshi | ||||
Regional section: | Okinawa | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: The Ryukyu Group is divisible into diconformable Pliocene and Plesitocene units. The lower sandy and silty part of the Ryukyu Group is divided into two geographic elemens, the Nakoshi Sand and the Chinen Sand. The Nakoshi Sand is assumed to be equivalent with the Chinen Sand. The Nakoshi sand is green to gray and locally it contains some soft, fine, light green silt, probably derived from nearby greenstones. The fossiliferous sand is underlain by an undetermined thickness of gravel. Presumably it is the basal conglomerate of the formation. |
Lithology and environment
Primary lithology: | gray,green sandstone |
Includes fossils? | Y |
Lithology description: Green to gray and localluty it contains some soft, fine, light green silt. | |
Environment: | coastal indet. |
Glacial or sequence phase: | transgressive |
Geology comments: Shallow water fauna compared to Chinen sand. |
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: | ME 21 | ||
Database number: | 42318 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy |
Modifier: | A. Hendy | Research group: | marine invertebrate |
Created: | 2004-07-27 22:57:52 | Last modified: | 2013-11-25 13:37:23 |
Access level: | the public | Released: | 2004-07-27 22:57:52 |
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] |