USGS M-277c, Ryukyu - Foster (1965) (Pliocene of Japan)

Also known as USGS M-277c

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 41600: 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.
unclassified
  -
Leucoma sp.
juvenile
Bivalvia
 Arcida - Arcidae
Striarca sp. Conrad 1862 clam
juvenile
 Pectinida - Pectinoidae
"Chlamys pallium" = Gloripallium pallium Linnaeus 1758 royal cloak scallop
Amusium sp. Röding 1798 scallop
fragment
"Chlamys cf. squamata" = Chlamys (Azumapecten) squamata Gmelin 1791 scallop
 Ostreida - Gryphaeidae
"Ostrea hyotis" = Hyotissa hyotis
"Ostrea hyotis" = Hyotissa hyotis Linnaeus 1758 Honeycomb Oyster
 Pholadida - Teredinidae
Kuphus sp. Guettard 1770 clam
 Cardiida - Chamidae
 Cardiida - Veneridae
Circe (Redicirce) sp. Schumacher 1817 venus clam
 Cardiida - Solecurtidae
 Cardiida - Tellinidae
Tellina sp. Linnaeus 1758 tellin clam
Gastropoda
 Neogastropoda - Columbellidae
 Neogastropoda - Nassariidae
 Neogastropoda - Fasciolariidae
Fusinus cf. colus Linnaeus 1758 snail
 Neogastropoda - Muricidae
 Neogastropoda - Mangeliidae
"Mangelia sp." = Cythara (Mangelia)
"Mangelia sp." = Cythara (Mangelia) Loven 1846 snail
 Neogastropoda - Drilliidae
Clavus sp. Monfort 1810 snail
juvenile
 Neogastropoda - Turridae
? Micantapex sp. Iredale 1936 turrid
juvenile
 Stromboidea - Strombidae
Tibia aff. fusus, "Canarium (Labiostrombus) cf. niasense" = Strombus (Labiostrombus)
Tibia aff. fusus true conch
"Canarium (Labiostrombus) cf. niasense" = Strombus (Labiostrombus) conch
 Naticoidea - Naticidae
Natica stellatus moon snail
 Cypraeoidea - Cypraeidae
Staphylaea cf. limacina Lamarck 1810 cowry
 Tonnoidea - Ranellidae
"Cymatium (Lampusia) cf. pileare" = Monoplex pilearis
"Cymatium (Lampusia) cf. pileare" = Monoplex pilearis Linnaeus 1758 triton shell
 Sorbeoconcha - Turritellidae
"Turritella cf. cingulifera" = Turritella (Kurosioia) cingulifera
"Turritella cf. cingulifera" = Turritella (Kurosioia) cingulifera Sowerby 1825 turret shell
 Sorbeoconcha - Cerithiidae
 Architectonicoidea - Architectonicidae
Architectonica sp. Röding 1798 sundial