USGS 17448 - Okinawa: Late/Upper Miocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda
- Naticidae
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Polinices cf. flemingianus
(Récluz 1844)
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= Polinices candidissimus
Le Guillou 1842
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Majima 1989 | ||||||
Gastropoda
- Neogastropoda
- Fasciolariidae
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Granulifusus niponicus
(Smith 1879)
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Gastropoda
- Neogastropoda
- Buccinidae
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Hindsia (Nihonophos) magnifica
(Lischke 1871)
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Gastropoda
- Neogastropoda
- Terebridae
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Terebra shimajiriensis
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Gastropoda
- Neogastropoda
- Conidae
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Conus cf. yabei
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Gastropoda
- Neogastropoda
- Turridae
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Micantapex striatotuberculata
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Gastropoda
- Neogastropoda
- Ancillariidae
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Ancilla (Baryspira) cf. albocallosa
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spelled with current rank as Amalda (Baryspira) | |||||||
Gastropoda
- Neogastropoda
- Costellariidae
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Makiyamaia coreanica
(Adams and Reeve 1850)
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Gastropoda
- Triviidae
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Dolichupis (Trivellona) shimajiriensis n. sp.
MacNeil 1960
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Gastropoda
- Ranellidae
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Biplex perca
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see common names |
Geography
Country: | Japan | State/province: | Okinawa |
Coordinates: | 26.2° North, 127.8° East (view map) | ||
Paleocoordinates: | 26.8° North, 126.8° East | ||
Basis of coordinate: | estimated from map | ||
Geographic resolution: | outcrop |
Time
Period: | Neogene | Epoch: | Miocene |
10 m.y. bin: | Cenozoic 6 | ||
Key time interval: | Late/Upper Miocene | ||
Age range of interval: | 11.63000 - 5.33300 m.y. ago |
Stratigraphy
Formation: | Shimajiri | Member: | Yonabaru Clay | ||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: The Yonabaru Clay includes all Shimajiri Formation exposed below the upper tuffaceous pumiceous zone. The Yonabaru consists of 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. Most macrofossils are found in sandy beds intercalated with the clays. The Yonabaru passes under the cover of the basal gravels of the Naha limestone, and lap onto or are faukted against Paleozoic basement rocks. |
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: | RS 250 | ||
Database number: | 42174 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy |
Modifier: | A. Hendy | Research group: | marine invertebrate |
Created: | 2004-07-25 20:00:39 | Last modified: | 2013-11-25 13:37:23 |
Access level: | group members | Released: | 2005-07-25 20:00:39 |
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] |