Natchitoches, LA; near top of Bed B, bag #2 (Eocene of the United States)

Also known as LNa-1b

Where: Natchitoches County, Louisiana (31.8° N, 93.1° W: paleocoordinates 33.5° N, 81.9° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: late zone, Weches Formation, Lutetian (47.8 - 41.3 Ma)

• above bed A

• bed-level stratigraphic resolution

Environment/lithology: offshore; unlithified, glauconitic marl

• glauconitic marl, oxidized, pale gray-green fresh

most fossils are moldic or rotten aragonite

Size class: mesofossils

Preservation: cast, original aragonite, original calcite

Collection methods: bulk, mechanical, sieve,

Primary reference: L. C. Ivany. 1997. Faunal stability and environmental change in the middle Eocene Gulf Coastal Plain (PhD Thesis, Harvard University). 1-221 [L. Ivany/L. Ivany/A. Clement]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 2410: authorized by Linda Ivany, entered by Linda Ivany on 03.07.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• includes all macrofossils but bivalves, but oysters ARE included
Anthozoa
 Scleractinia - Turbinoliidae
Turbinolia pharetra Lea 1833 stony coral
Gymnolaemata
 Cheilostomata - Lunulitidae
Lunulitidae indet. Lagaaij 1952
lunulitid A
 Cheilostomata - Lepraliellidae
"Holoporella granulosa" = Celleporaria
"Holoporella granulosa" = Celleporaria
Gastropoda
  -
Gastropoda indet. Cuvier 1795 snail
Gastropod Y
 Sorbeoconcha - Naticidae
Naticidae indet. Guilding 1834 moon snail
 Neogastropoda - Melongenidae
 Opisthobranchia - Retusidae
 Heterostropha - Architectonicidae
Architectonica meekana sundial
A. m. splendida
 Heterostropha - Ringiculidae