USGS 17658, Highway 1 (FSM 68) (Pleistocene of Japan)

Where: Okinawa, Japan (26.3° N, 127.8° E: paleocoordinates 26.3° N, 127.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Sobe Formation (Ryukyu Group), Middle Pleistocene (0.8 - 0.1 Ma)

• The Yontan Limestone is the upper part of the Ryukyu Limestone, now called the Sobe Formation. Early middle Pleistocene in age (Odawara et al., 2005).

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; poorly lithified, coarse-grained, conglomeratic limestone

• Coral reef environment, according to Takayasu (1978)
• Limestone, though coarser than that of the Naha. Locally it consists of unsorted detrital fragments up to a foot in dimension

Size class: macrofossils

Collected by F. Stearns MacNeil; 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 190258: authorized by Matthew Clapham, entered by Matthew Clapham on 03.12.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Terebratulida - Frenulinidae
 Rhynchonellida - Basiliolidae