USGS 17729, Gushichan (RS 347) (Pleistocene of Japan)

Where: Okinawa, Japan (26.1° N, 127.7° E: paleocoordinates 26.2° N, 127.6° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Chinen Formation (Ryukyu Group), Calabrian (1.8 - 0.8 Ma)

• Chinen sand belongs to calcareous nannoplankton zone CN13a and planktonic foram zone N22 (UjiiĆ©, 1994), indicating a Calabrian age.

• bed-level stratigraphic resolution

Environment/lithology: marine; fine-grained, gray, silty sandstone

• Probably reworked Shimajiri material during a transgression. Its deposition was followed immediately by a period during which reefs flourished and large ares were strewn with reef detritus.
• Light gray to dark gray, uniformely fine, can have fine silt partings.

Size class: macrofossils

Collected by Raymond A. Saplis; reposited in the USNM

Primary reference: G. A. Cooper. 1957. Tertiary and Pleistocene Brachiopods of Okinawa, Ryukyu Islands. United States Geological Survey Professional Paper 314(A):1-20 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 190264: authorized by Matthew Clapham, entered by Matthew Clapham on 03.12.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Terebratulida - Terebratulidae
"Gryphus stearnsi" = Dallithyris stearnsi
"Gryphus stearnsi" = Dallithyris stearnsi Dall and Pilsbry 1891