USGS 17445, Yonabaru: Pliocene, Japan
collected by Raymond A. Saplis

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Neogastropoda - Clavatulidae
MacNeil 1960
Gastropoda - Campanilidae
MacNeil 1960
Gastropoda - Naticidae
Natica cf. vitellus (Linnaeus 1758)
MacNeil 1960
Gastropoda - Neogastropoda - Conidae
MacNeil 1960
Conus cf. litteratus Linnaeus 1758
MacNeil 1960
Gastropoda - Neogastropoda - Turridae
MacNeil 1960
species name is listed as: striato-tuberculata
MacNeil 1960
Gastropoda - Neogastropoda - Clavatulidae
? Makiyamaia ? coreanica (Adams and Reeve 1850)
MacNeil 1960
Gastropoda - Neogastropoda - Drilliidae
MacNeil 1960
Gastropoda - Neogastropoda - Cochlespiridae
MacNeil 1960
Gastropoda - Neogastropoda - Ancillariidae
MacNeil 1960
Gastropoda - Neogastropoda - Buccinidae
MacNeil 1960
Gastropoda - Neogastropoda - Fasciolariidae
MacNeil 1960
Gastropoda - Neogastropoda - Cancellariidae
MacNeil 1960
Gastropoda - Neogastropoda - Muricidae
Chicoreus sp. Monfort 1810
MacNeil 1960
Gastropoda - Neogastropoda - Volutidae
MacNeil 1960
Gastropoda - Eucyclidae
Bathybembix sp. Crosse 1892
MacNeil 1960
Gastropoda - Heterostropha - Architectonicidae
Architectonica maxima (Philippi 1849)
MacNeil 1960
Rhynchonellata - Terebratulida - Frenulinidae
see common names

Geography
Country:Japan State/province:Okinawa
Coordinates: 26.2° North, 127.7° East (view map)
Paleocoordinates:
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Pliocene
10 m.y. bin: Cenozoic 6
*Period:Middle Tertiary - Late/Upper Tertiary *Epoch:Late/Upper Miocene
Key time interval: Pliocene
Age range of interval: 5.333 - 2.58 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Geological group:Shimajiri Formation:Yonabaru
Stratigraphic resolution:bed
Stratigraphy comments: Fossiliferous bed at the base of low hill. Yonabaru Mudstone (now a formation) spans calcareous nannofossil zones CN10b to middle of CN12b and planktonic foram zones PL1 to PL4 (Ujiié, 1994), indicating an age of primarily Pliocene (but ranging from latest Messinian to possibly early Gelasian).
Lithology and environment
Primary lithology:gray,blue poorly lithified silty,sandy claystone
Lithology description: Bluish to gray silty to sandy clay, commonly with hackly to conchiodial fracture and fine dark-colored laminated to massive sand, weathering brown to gray, and which in places contains large lime indurated concretions of sand. Most macrofossils found in interclated clay/sand beds. Poorly lithified based on description and fossil preservation.
Environment:offshore
Geology comments: The author estimates that the Yonabaru Clay member was deposted in <100 to 300 fathoms of water.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Collectors:Raymond A. Saplis
Metadata
Database number:26654
Authorizer:A. Miller, M. Clapham Enterer:C. Ferguson, M. Clapham
Modifier:M. Clapham Research group:marine invertebrate
Created:2002-10-21 13:33:25 Last modified:2025-02-22 15:12:02
Access level:the public Released:2002-10-21 13:33:25
Creative Commons license:CC0
Reference information

Primary reference:
39467. G. A. Cooper. 1957. Tertiary and Pleistocene Brachiopods of Okinawa, Ryukyu Islands. United States Geological Survey Professional Paper 314(A):1-20 [A. Hendy/A. Hendy]

Secondary references:

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]