Where: Okinawa, Japan (26.1° N, 127.7° E: paleocoordinates 26.7° N, 126.7° E)
• coordinate estimated from map
• small collection-level geographic resolution
When: Shinzato Tuff Member (Shimajiri Formation), Late/Upper Miocene to Late/Upper Miocene (11.6 - 3.6 Ma)
• The uppermost part of the Shimajiri Formation. The Shinzato is fairly homogeneus, consisting for the most part of sandyy or silty clays with minor partings of ash. Its color ranges from dark gray to light gray. Its maximum known thickness is about 200 ft. The base of the formation is characterized by conglomeratic pumice, and in places chanels cut into the Yonabaru Clay Member.
• bed-level stratigraphic resolution
Environment/lithology: deep-water; tuffaceous, gray, silty, sandy claystone
Size class: macrofossils
Preservation: original aragonite
Reposited in the USNM
Collection methods: surface (float),
• 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 42184: authorized by Austin Hendy, entered by Austin Hendy on 25.07.2004
Creative Commons license: CC BY (attribution)