F-1 (4525-4553 ft), Eniwetok Atol (Eocene of Marshall Islands)

Where: Marshall Islands (11.7° N, 162.2° E: paleocoordinates 3.5° N, 173.0° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Middle Eocene (48.6 - 37.2 Ma)

• Cuttings collected from 4525-4553 feet in F-1. Limestone

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, coarse-grained, dolomitic, shelly/skeletal, calcareous limestone

• Carbonate facies. Shallow water. No paleoenvironmental data presented.
• Limestone, moderately hard, porous, poorly sorted, coarse-grained; made up of algae and foram debris. Scattered rhombs of dolomite.

Size class: macrofossils

Preservation: mold/impression, original calcite, replaced with dolomite

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

Collection methods: core,

• Collections reposited in the USNM collections. Collected during drilling by the Atomic Energy Comission.

Primary reference: H. S. Ladd and S.O. Schlanger. 1960. Drilling operations on Eniwetok Atoll. United States Geological Survey Professional Paper 260(Y):863-903 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 43328: authorized by Austin Hendy, entered by Austin Hendy on 12.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Representative, but not exhaustive.
 Arcida - Arcidae
Arca sp. Linnaeus 1758 ark
 Pectinida - Pectinoidae
Pecten sp. Müller 1776 scallop
 Cypraeoidea - Cypraeidae
Cypraea sp. Linnaeus 1758 cowry