2A (800-900 ft), Bikini Island: Late/Upper Miocene, Marshall Islands
collected by JTF 1947

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Polyplacophora - Neoloricata - Schizochitonidae
Schizochiton marshallensis Ladd 1966
Gastropoda - Rissoidae
Rissoina (Rissoina) concinna
Gastropoda - Eratoidae
Trivia (Trivirostra) oryza (Lamarck 1810)
Ladd 1977
recombined as Trivirostra oryza
Gastropoda - Neogastropoda - Columbellidae
Zemitrella bikiniensis
Ladd 1977
Gastropoda - Neogastropoda - Mangeliidae
Eucithara marshallensis
Ladd 1982
Gastropoda - Hipponicidae
Capulus (Krebsia) informal sp. B (Mörch 1877)
Ladd 1972
original and current combination Krebsia
Gastropoda - Phasianellidae
Phasianella sp. Lamarck 1804
Gastropoda - Turbinidae
Leptothyra wellsi
synonym of Collonista
Gastropoda - Neritidae
Smaragdia (Smaragdia) colei
see common names

Geography
Country:Marshall Islands
Coordinates: 11.6° North, 165.4° East (view map)
Paleocoordinates:8.6° North, 171.6° East
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Neogene Epoch:Miocene
10 m.y. bin:Cenozoic 6
Key time interval:Late/Upper Miocene
Age range of interval:11.63000 - 5.33300 m.y. ago
Stratigraphy
Local section:2A Local bed:850 ft
Local order:top to bottom
Regional section:Bikini Island Regional bed:850 ft
Regional order:top to bottom
Stratigraphic resolution:group of beds
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From an undifferentiated lithostratigraphic unit. AGE: Late Miocene, on the basis of foraminiferal biostratigraphy. STRATIGRAPHIC POSITION: A composite from several beds within the section of drill core of 800-900 ft.
Lithology and environment
Primary lithology: unlithified not reported
Includes fossils?Y
Lithology description: LITHOLOGY: Unknown, probably carbonate. LITHIFICATION: Unlithified, on the basis of figured specimens.
Environment:lagoonal/restricted shallow subtidal
Geology comments: EMVIRONMENT: Probably accumulated in an open lagoon, shelf, or reef platform, rather than on a steep seaward slope of a reef.
Taphonomy
Modes of preservation:body,original aragonite
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:core,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Collectors:JTF Collection dates:1947
Collection method comments: COLLECTOR: Operation Crossroads, Joint Task Force One, 1947. REPOSITORY: USNM.
Taxonomic list comments:COEVERAGE: Representative, but not exhaustive for gastropoda. NOMENCLATURE: An authoritative publication with relatively modern nomenclature, subgenus- and species-level identifications. IDENTIFIER: H. S. Ladd.
Metadata
Database number:78022
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2008-01-25 07:17:29 Last modified:2013-11-25 13:37:23
Access level:authorizer only Released:2009-01-25 07:17:29
Creative Commons license:CC BY
Reference information

Primary reference:
26223. H. S. Ladd. 1966. Chitons and Gastropods (Haliotidae through Adeorbidae) from Western Pacific Islands. United States Geological Survey Professional Paper 531:1-98 [A. Hendy/A. Hendy/J. Millet]

Secondary references:

11409 H. S. Ladd. 1972. Cenozoic fossil mollusks from Western Pacific Islands; Gastropods (Turritellidae through Strombidae). United States Geological Survey Professional Paper 532:1-79 [A. Miller/A. Hendy/A. Hendy]
11410 H. S. Ladd. 1977. Cenozoic fossil mollusks from Western Pacific Islands; Gastropods (Eratoidae through Harpidae). United States Geological Survey Professional Paper 533:1-84 [A. Miller/A. Hendy/J. Millet]
26328 H. S. Ladd. 1982. Cenozoic fossil mollusks from Western Pacific Islands; Gastropods (Volutidae through Terebridae). United States Geological Survey Professional Paper 1171:1-100 [A. Hendy/A. Hendy]