Also known as FSM 13
Where: Okinawa, Japan (26.3° N, 127.8° E: paleocoordinates 26.9° 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 42167: authorized by Austin Hendy, entered by Austin Hendy on 25.07.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
"Ancilla (Baryspira) cf. albocallosa" = Amalda (Baryspira)
"Ancilla (Baryspira) cf. albocallosa" = Amalda (Baryspira) snail | |
Olivella aff. fulgurata olive snail | |
Mitra (Cancilla) cf. granatinaeformis Martin 1884 mitre shell | |
Cyllene gracilenta snail
Nassarius (? Niotha) sp. Adams and Adams 1853 snail | |
Fusinus sp. Rafinesque 1815 snail
Dolicholatirus cf. acus snail | |
Gemmula aff. asukana turrid | |
Conus aff. raphanus cone shell | |
Terebra aff. anomala auger snail | |
Ficus subintermedia fig shell | |
Xenophora sp. Fischer von Waldheim 1807 carrier shell |