Also known as ME 21

Where: Okinawa, Japan (26.6° N, 128.1° E: paleocoordinates 26.9° N, 127.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Nakoshi Sandstone Member, Early/Lower Pliocene (5.3 - 3.6 Ma)

• The Ryukyu Group is divisible into diconformable Pliocene and Plesitocene units. The lower sandy and silty part of the Ryukyu Group is divided into two geographic elemens, the Nakoshi Sand and the Chinen Sand. The Nakoshi Sand is assumed to be equivalent with the Chinen Sand. The Nakoshi sand is green to gray and locally it contains some soft, fine, light green silt, probably derived from nearby greenstones. The fossiliferous sand is underlain by an undetermined thickness of gravel. Presumably it is the basal conglomerate of the formation.

• bed-level stratigraphic resolution

Environment/lithology: coastal; gray, green 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 42318: authorized by Austin Hendy, entered by Austin Hendy on 27.07.2004

Creative Commons license: CC BY (attribution)