USGS 17543, Highway 6 quarry (WF 234) (Pleistocene of Japan)

Where: Okinawa, Japan (26.4° N, 127.7° E: paleocoordinates 26.4° N, 127.7° 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: poorly lithified, coarse-grained, conglomeratic limestone

• Shallow water carbonate environment? No specific paleoenvironmental data provided.
• Limestone, though coarser than that of the Naha. Locally it consists of unsorted detrital fragments up to a foot in dimension

Size class: macrofossils

Preservation: original aragonite

Collected by Warren Fuller; reposited in the USNM

Collection methods: quarrying,

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 42356: authorized by Austin Hendy, entered by Austin Hendy on 28.07.2004, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for gastropoda. No bivalves.
Gastropoda
 Neogastropoda - Columbellidae
 Neogastropoda - Conidae
 Cypraeoidea - Cypraeidae
"Cribraria (Talostolida) teres" = Talostolida teres
"Cribraria (Talostolida) teres" = Talostolida teres Gmelin 1791 cowry
 Turbinoidea - Turbinidae
"Marmorostoma argyrostoma" = Turbo (Marmarostoma), "Turbo petholatus" = Turbo (Turbo) petholatus
"Marmorostoma argyrostoma" = Turbo (Marmarostoma) snail
"Turbo petholatus" = Turbo (Turbo) petholatus Linnaeus 1758 snail
 Trochoidea - Trochidae
"Trochus niloticus" = Tectus (Rochia) niloticus Linnaeus 1767 top snail
Rhynchonellata
 Terebratulida - Cancellothyrididae
Terebratulina sp. d'Orbigny 1847