USGS 17442 - Chinen Sand Member, Ryukyu Group, Okinawa: Early/Lower Pliocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Clathrodillia cf. jeffreysii
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Compsodillia nakamurai
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Gastropoda
- Heterostropha
- Architectonicidae
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Architectonica maxima
(Philippi 1849)
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recombined as Architectonica (Architectonica) maxima | |||||||
Architectonica perspectiva
(Linnaeus 1767)
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Gastropoda
- Trochidae
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Ethalia subpulchella
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Monilea haebaruensis
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Gastropoda
- Turritellidae
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Turritella filiola
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Gastropoda
- Naticidae
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Naticarius cf. andoi
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= Tanea undulata
Röding 1798
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Majima 1989 | ||||||
Polinices albumen
(Linnaeus 1758)
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Mammilla melanostoma
(Gmelin 1791)
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Natica cf. vitellus
(Linnaeus 1758)
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Gastropoda
- Neogastropoda
- Columbellidae
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Pyrene aff. flava
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Gastropoda
- Neogastropoda
- Fasciolariidae
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Fusinus cf. nodosoplicatus
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Gastropoda
- Neogastropoda
- Nassariidae
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Nassarius (Niotha) caelatus
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Gastropoda
- Neogastropoda
- Mitridae
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Mitra (Cancilla) filaris
Linnaeus 1771
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Mitra (Cancilla) cf. flammea
(Quoy 1832)
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Gastropoda
- Neogastropoda
- Clathurellidae
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Euclathurella fimbria
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Glyphostoma subcosticrenata
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Gastropoda
- Neogastropoda
- Clavatulidae
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Clavatula (Alticlavatula) cf. kakegawensis
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Gastropoda
- Neogastropoda
- Conidae
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Conus aff. virgo
Linnaeus 1758
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Gastropoda
- Neogastropoda
- Turridae
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Lophiotoma cf. leuctropis
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Lophiotoma marmorata
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Gastropoda
- Neogastropoda
- Costellariidae
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Uromitra aff. obeliscus
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Gastropoda
- Neogastropoda
- Muricidae
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Typhis arcuatus
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Gastropoda
- Ovulidae
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Volva (? Pellasimnia) sp.
Iredale 1931
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Gastropoda
- Tonnidae
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Tonna luteostoma
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Gastropoda
- Ranellidae
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Cymatium (Limatella) cingulatum
(Lamarck 1822)
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synonym of Linatella caudata | |||||||
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: Fine gray sand. 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 sandstone |
Includes fossils? | Y |
Lithology description: Fine gray sand | |
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: | MD 25 | ||
Database number: | 42229 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy |
Modifier: | A. Hendy | Research group: | marine invertebrate |
Created: | 2004-07-26 21:07:25 | Last modified: | 2013-11-25 13:37:23 |
Access level: | group members | Released: | 2005-07-26 21:07:25 |
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] |
Secondary references:
26376 | R. Majima. 1989. Cenozoic fossil Naticidae (Mollusca: Gastropoda) in Japan. Bulletins of American Paleontology 96(331):1-159 [A. Hendy/A. Hendy] |