Leona - Cook Mountain Fm [Nautiloida] (Eocene of the United States)

Where: Leon County, Texas (31.1° N, 95.8° W: paleocoordinates 32.4° N, 87.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Bartonian (41.3 - 38.0 Ma)

• STRATIGRAPHIC RELATIONS: From unknown lithostratigraphic unit. Nearest Oligocene unit is Pittsburgh Bluff Fm (60 km). AGE: Eocene, according to Miller (1947); Lutetian, according to Hanson (1978); Bartonian, according to Ivany (1997). STRATIGRAPHIC POSITION: From unknown position within section.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified siliciclastic sediments

• ENVIRONMENT: Not stated, but presumably shallow marine siliciclastic environment.
• SPECIFIC LITHOLOGY: Unknown, but presumably siliciclastic facies. LITHIFICATION: Lithified, on the basis of specimen preservation.

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: COLLECTOR: Unknown collector. REPOSITORY: University of Texas.

Primary reference: A. K. Miller. 1947. Tertiary nautiloids of the Americas. Geological Society of America Memoir 23:1-234 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 81849: authorized by Austin Hendy, entered by Austin Hendy on 16.07.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to Nautiloida. NOMENCLATURE: Authoritative publication with relatively recent nomenclature and species-resolution identifications.
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