E-1 (2700-2800 ft), Eniwetok Atol (Oligocene of Marshall Islands)

Where: Marshall Islands (11.4° N, 162.4° E: paleocoordinates 4.8° N, 178.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Early/Lower Oligocene (33.9 - 28.4 Ma)

• STRATIGRAPHIC RELATIONS: From an undifferentiated lithostratigraphic unit. AGE: Early Oligocene, on the basis of foraminiferal biostratigraphy and stratigraphic position. STRATIGRAPHIC POSITION: A composite list from several beds within this section of drill core, from 2700-2800 ft.

• group of beds-level stratigraphic resolution

Environment/lithology: poorly lithified, shelly/skeletal carbonate

• ENVIRONMENT: Carbonate facies. Shallow water, presumably reefal. No paleoenvironmental data presented.
• LITHOLOGY: Not stated, but presumably carbonate. LITHIFICATION: Poorly-llithified, on the basis of figured specimens.

Size class: macrofossils

Collected by ONR and USGS in 1952; reposited in the USNM

Collection methods: core,

• COLLECTOR: Office of Naval Research and USGS, 1952. REPOSITORY: USNM.

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 77982: authorized by Austin Hendy, entered by Austin Hendy on 24.01.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Not quite exhaustive, but comprehensive for gastropods. Bivalves not covered in publications. NOMENCLATURE: Authoritative publication, with moderately modern nomenclature, with subgenus and species-resolution assignments. IDENTIFIER: H. S. Ladd.
Gastropoda
 Architaenioglossa - Ampullinidae
"Ampullina (Ampullinopsis) berauensis" = Ampullinopsis2
"Ampullina (Ampullinopsis) berauensis" = Ampullinopsis2 snail
 Sorbeoconcha - Potamididae
Vicarya sp.1 d'Archiac and Haimes 1854 horn snail
 Sorbeoconcha - Turritellidae
Vermicularia "sp. A"1, "Turritella (Turritella) aff. cingulifera" = Turritella (Kurosioia) cingulifera1
Vermicularia "sp. A"1 Lamarck 1799 turret shell
"Turritella (Turritella) aff. cingulifera" = Turritella (Kurosioia) cingulifera1 Sowerby 1825 turret shell