Also known as RS 270
Where: Okinawa, Japan (26.2° N, 127.7° E: paleocoordinates 26.8° N, 126.7° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Yonabaru Clay Member (Shimajiri Formation), Late/Upper Miocene (11.6 - 5.3 Ma)
• 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.
• bed-level stratigraphic resolution
Environment/lithology: deep-water; poorly lithified, silty, sandy claystone and concretionary, brown, gray sandstone
Size class: macrofossils
Preservation: original aragonite
Reposited in the USNM
Collection methods: quarrying,
• Collections held in USNM and UGSG repositories.
Primary reference: 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]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 42173: authorized by Austin Hendy, entered by Austin Hendy on 25.07.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Syrnola aff. titizimana snail | |
Architectonica perspectiva Linnaeus 1767 sundial | |
Turritella filiola turret shell | |
Tonna luetostoma tun shell | |
"Cribraria (Talostolida) aff. cincta" = Erronea (Cribraria) cincta
"Cribraria (Talostolida) aff. cincta" = Erronea (Cribraria) cincta Martin 1899 cowry | |
Dolichupis (Trivellona) shimajiriensis MacNeil 1960 snail | |
Mitra (Cancilla) cf. granatinaeformis Martin 1884 mitre shell | |
Olivella aff. fulgurata olive snail | |
Siphonalia yonabaruensis true whelk | |
Mitrella gonzabuensis snail | |
Crassopleura aff. brevis snail | |
Lophiotoma cf. leucotropis turrid | |
Conus cf. cosmetulus, "Conus cf. litteratus" = Conus (Lithoconus) litteratus
Conus cf. cosmetulus cone shell
"Conus cf. litteratus" = Conus (Lithoconus) litteratus Linnaeus 1758 cone shell | |
? Vasum sp., "Afer aff. oostinghi" = Tudivasum (Afer)
? Vasum sp. Röding 1798 snail
"Afer aff. oostinghi" = Tudivasum (Afer) snail | |
| |
Euspira cf. pallida Broderip and Sowerby 1829 moon snail | |
Monilea (Rossiteria) cf. nuclea top snail |