Also known as MD 25
Where: Okinawa, Japan (26.3° N, 127.9° E: paleocoordinates 26.6° N, 127.4° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Chinen Sand Member, Early/Lower Pliocene (5.3 - 3.6 Ma)
• Fine gray sand. Lower sand units were formely included in the Shimajiri beds, but they are disconformable with the underlying Shimajiri Formation. The lower sandy and silty part of the Ryukyu Group is divided into two elements, the Nakoshi Sand and the Chinen Sand. Presumably the two members are equivalent in age, but they are laterally not related. The Chinen sand is light gray to dark gray and more uniformely fine than the Nakoshi, and can have fine silt partings.
• bed-level stratigraphic resolution
Environment/lithology: marine; unlithified, fine-grained, gray sandstone
Size class: macrofossils
Preservation: original aragonite
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 42229: authorized by Austin Hendy, entered by Austin Hendy on 26.07.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Gastropoda | |
Monilea haebaruensis top snail
Ethalia subpulchella top snail | |
Turritella filiola turret shell | |
Mitra (Cancilla) filaris Linnaeus 1771 mitre shell
Mitra (Cancilla) cf. flammea Quoy 1832 mitre shell | |
Pyrene aff. flava snail | |
Conus aff. virgo Linnaeus 1758 cone shell | |
Euclathurella fimbria snail | |
Lophiotoma cf. leuctropis turrid
Lophiotoma marmorata turrid | |
Uromitra aff. obeliscus ribbed mitre | |
Typhis arcuatus murex snail | |
Tonna luteostoma tun shell | |
"Cymatium (Limatella) cingulatum" = Linatella caudata
"Cymatium (Limatella) cingulatum" = Linatella caudata Gmelin 1791 triton shell | |
Volva (? Pellasimnia) sp. Iredale 1931 snail | |
Polinices albumen Linnaeus 1758 moon snail
Mammilla melanostoma Gmelin 1791 moon snail
Tanea undulata Röding 1798 moon snail
Natica cf. vitellus Linnaeus 1758 moon snail | |
"Architectonica maxima" = Architectonica (Architectonica) maxima, Architectonica perspectiva
"Architectonica maxima" = Architectonica (Architectonica) maxima Philippi 1849 sundial
Architectonica perspectiva Linnaeus 1767 sundial |