2A (200-300 ft), Bikini Island (Pleistocene of Marshall Islands)

Where: Marshall Islands (11.6° N, 165.4° E: paleocoordinates 10.9° N, 167.0° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Early/Lower Pleistocene (2.6 - 0.8 Ma)

• STRATIGRAPHIC RELATIONS: From an undifferentiated lithostratigraphic unit. AGE: Early Pleistocene, on the basis of stratigraphic position. STRATIGRAPHIC POSITION: A composite from several beds within the section of drill core of 200-300 ft.

• group of beds-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; poorly lithified, fine-grained, medium, white limestone

• EMVIRONMENT: Fauna similar to that dredge in shallow water of Bikini Lagoon
• LITHOLOGY: Rather compact, white, fine to medium-grained detrital limestone. Some of the core fragments are compact and well consolidated, others are rather friable. LITHIFICATION: Poorly lithified, on the basis facies description and figured specimens.

Size class: macrofossils

Collected by JTF in 1947; reposited in the UNSM

Collection methods: core,

• COLLECTOR: Operation Crossroads, Joint Task Force One, 1947. REPOSITORY: USNM.

Primary reference: K. O. Emery, J. I. Tracey, and H.S. Ladd. 1954. Geology of Bikini and nearby atolls: Part 1, Geology. United States Geological Survey Professional Paper 260(A):1-265 [A. Miller/A. Hendy/R. McClees-Funinan]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 43338: authorized by Austin Hendy, entered by Austin Hendy on 12.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• COEVERAGE: Representative, but not exhaustive of bivalvia and gastropoda. NOMENCLATURE: Mixture of some slightly antiquated and broad identifications and more modern nomenclature, subgenus- and species-level identifications from an authoritative publication. IDENTIFIER: H. S. Ladd.
 Asterigerinacea - Amphisteginidae
 Arcida - Arcidae
Arca sp. Linnaeus 1758 ark
 Cardiida - Veneridae
"Lioconcha cf. picta" = Lioconcha (Lioconcha) ornata, Circe sp.
"Lioconcha cf. picta" = Lioconcha (Lioconcha) ornata Dillwyn 1817 venus clam
Circe sp. Schumacher 1817 venus clam
 Cardiida - Tellinidae
Tellina sp. Linnaeus 1758 tellin clam
Listed as "two tellinids"
 Cardiida - Cardiidae
Cardium sp. Linnaeus 1758 cockle
 Neogastropoda - Columbellidae
 Neogastropoda - Nassariidae
 Stromboidea - Strombidae
"Strombus (Canarium) erythrinus" = Canarium2
"Strombus (Canarium) erythrinus" = Canarium2 true conch
 Naticoidea - Naticidae
"Polinices (Polinices) mammilla" = Natica (Natica) mamilla3
"Polinices (Polinices) mammilla" = Natica (Natica) mamilla3 Linnaeus 1758 moon snail
 Vermetoidea - Vermetidae
"Petaloconchus (Macrophragma) lamellosus" = Macrophragma2
"Petaloconchus (Macrophragma) lamellosus" = Macrophragma2 worm shell
 Sorbeoconcha - Turritellidae
Turritella (Turritella) "sp. B"2 Lamarck 1799 turret shell
 Sorbeoconcha - Cerithiidae
Rhinoclavis (Rhinoclavis) vertagus2 Linnaeus 1758 cerith snail
 Turbinoidea - Turbinidae
"Leptothyra glareosa" = Collonista glareosa1
"Leptothyra glareosa" = Collonista glareosa1 Gould 1861 snail
 Trochoidea - Trochidae
Monilea (Monilea) marshallensis1 Ladd 1966 top snail
 Scleractinia - Acroporidae
Acropora sp.1 Oken 1815 stony coral
 Corallinales - Hapalidiaceae
Lithothamnion sp.1 Heydrich 1897
 Miliolida - Soritidae