Naha Limestone, Ryukyu Group, Okinawa: Late/Upper Pliocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Malacostraca
- Decapoda
- Macrophthalmidae
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Macrophthalmus (Euplax) latreillei
(Desmarest 1822)
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Karasawa et al. 1995 | |||||||||
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Macrophthalmus (Euplax) granulosus
de Man 1904
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Karasawa et al. 1995 | |||||||||
| synonym of Macrophthalmus latreillei | ||||||||||
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Malacostraca
- Decapoda
- Leucosiidae
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Myra fugax
(Fabricius 1798)
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Karasawa et al. 1995 | |||||||||
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Malacostraca
- Decapoda
- Portunidae
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Podophthalmus vigil
(Fabricius 1798)
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Karasawa et al. 1995 | |||||||||
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Malacostraca
- Decapoda
- Callianassidae
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Neocallichirus sp.
Sakai 1988
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Karasawa et al. 1995 | |||||||||
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Bivalvia
- Arcida
- Arcidae
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Bentharca sp.
Verrill and Bush 1898
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| Once referred to as Pseudogramatodon pacificus.....an unlikely ID according to MacNeil (1960) | ||||||||||
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Bivalvia
- Pectinida
- Pectinidae
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Chlamys satoi
Yokoyama 1928
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Pecten byoritzuensis
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Pecten (Amussiopecten) praesignis
Yokoyama 1922
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| recombined as Amussiopecten praesignis | ||||||||||
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Bivalvia
- Ostreida
- Gryphaeidae
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Ostrea musashiana
Yokoyama 1920
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| recombined as Neopycnodonta musashiana | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Japan | State/province: | Okinawa |
| Coordinates: | 26.5° North, 127.8° East (view map) | ||
| Paleocoordinates: | 26.7° North, 127.4° East | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | basin |
Time
| Period: | Neogene | Epoch: | Pliocene |
| Stage: | Piacenzian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Late/Upper Pliocene | ||
| Age range of interval: | 3.60000 - 2.58000 m.y. ago |
Stratigraphy
| Geological group: | Ryukyu | Member: | Naha Limestone | ||
| Regional section: | Okinawa | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: The lower part of the Riukiu Limestone is called the Naha Limestone. It is of Pliocene age and is seperated from the overlying Yontan Limestone (Pleistocene) by an erosional boundary. The Naha Limestone is not a homogeneous lithologic unit. Most of it is poorly indurated medium to coarse grained lime sand, but other parts of it range from a powdery limestone to a dense nonporous limestone. It ranges in color from nearly white to brownish yellow. | |||||
Lithology and environment
| Primary lithology: | brown,yellow poorly lithified calcareous grainstone |
| Secondary lithology: | brown,white poorly lithified "limestone" |
| Includes fossils? | Y |
| Lithology description: Poorly indurated medium to coarse grained lime sand, but other parts of it range from a powdery limestone to a dense nonporous limestone. It ranges in color from nearly white to brownish yellow. | |
| Environment: | lagoonal/restricted shallow subtidal |
| Glacial or sequence phase: | transgressive |
| Geology comments: Probably is a reef limestone, but only coral rich in a few places. It is presumed that the Naha Limestone is a detrital lagoon deposit or a reef detritus deposited on an insular shelf. The lower part is more widespread that the upper part, probably reflecting erosion during deposition of the Yontan Limestone. The highest beds are less conglomeratic and generally contain abundant algal nodules. | |
Taphonomy
| Modes of preservation: | body,original aragonite |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| 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:Taxa described in text, but not listed for specific localities. Importantly this list contains bivalvia | |
Metadata
| Database number: | 42383 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-07-28 13:52:11 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2004-07-28 13:52:11 |
| 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:
| 13721 | 1% 3220 | H. Karasawa, T. Nohara, and K. Shimoji. 1995. Decapod Crustacea from the Ryukyu Group (Pleistocene) of Okinawa-jima, Japan. Bulletin of the Mizunami Fossil Museum 22:127-135 [A. Miller/A. Hendy/A. Hendy] |