USGS M-278b, Ryukyu - Foster (1965) (Pliocene of Japan)

Also known as USGS M-278b

Where: Ryukyu, Japan (24.4° N, 124.2° E: paleocoordinates 24.6° N, 123.9° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Bunera Clay Member (Nagura Gravel Formation), Late/Upper Pliocene (3.6 - 2.6 Ma)

• The Bunera Clay member of the Nagura Gravel is generally overlain by Pleistocene gravel deposits and may rest unconformably on schist. The clay's thickness is unknown, though is less than 5 m at its type section.

• bed-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, gray, blue, silty, sandy, calcareous claystone

• Offshore marine habitat on a muddy bottom of moderate depth.
• Medium to dark gray or bluish gray. It is silty or sandy in places and slightly calcareous

Size class: macrofossils

Preservation: original aragonite, original calcite

Reposited in the USNM

Collection methods: quarrying,

• Collections probably reposited in USGS and USNM. Identified by F.S. MacNeil

Primary reference: H. L. Foster. 1965. Geology of Ishigaki-shima Ryukyu-retto. United States Geological Survey Professional Paper 399(A):1-119 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 41598: authorized by Austin Hendy, entered by Austin Hendy on 17.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Forams and plant fossils are present in the Bunera Clay Member at these locations by are not listed.
Bivalvia
 Pectinida - Pectinoidae
Spondylus regius Linnaeus 1758 scallop
Chlamys cf. gracilisquamosa scallop
possibly a juvenile of C. satoi
 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
juvenile
 Ostreida - Malleidae
Vulsella sp. Ršding 1798 oyster
fragment
 Mytilida - Mytilidae
Mytilus sp. Linnaeus 1758 mussel
 Cardiida - Veneridae
? Dosinia sp. Scopoli 1777 venus clam
fragment
 Cardiida - Psammobiidae
? Soletellina sp. Blainville 1824 sunset shell
juvenile
 Cardiida - Cardiidae
 Lucinida - Lucinidae
"Lucinoma cf. annulata" = Lucinoma annulatum
"Lucinoma cf. annulata" = Lucinoma annulatum Reeve 1850 clam
Gastropoda
 Neogastropoda - Nassariidae
Nassarius cf. dorsatus Röding 1798 snail
 Neogastropoda - Turridae
 Tonnoidea - Ranellidae
"? Cymatium (Lampusia) cf. pileare" = Monoplex pilearis, Cymatium gutturnium
"? Cymatium (Lampusia) cf. pileare" = Monoplex pilearis Linnaeus 1758 triton shell
Cymatium gutturnium triton shell
 Sorbeoconcha - Turritellidae
"Turritella cf. cingulifera" = Turritella (Kurosioia) cingulifera
"Turritella cf. cingulifera" = Turritella (Kurosioia) cingulifera Sowerby 1825 turret shell
 Sorbeoconcha - Cerithiidae
Bittium sp. Gray 1847 cerith snail