Yellowstone River, 1 mile below Elk Creek, opposite Hellroaring Creek (Eocene of the United States)

Where: Wyoming (44.0° N, 109.0° W: paleocoordinates 46.7° N, 97.4° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Sepulcher Formation, Middle Eocene (47.8 - 37.7 Ma)

• bed-level stratigraphic resolution

Environment/lithology:

Size class: macrofossils

Preservation: mold/impression, adpression, original carbon

Primary reference: F. H. Knowlton. 1899. Fossil Flora of the Yellowstone National Park. USGS Monograph Series 32(2) [H. Sims/H. Lindon/H. Lindon]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 24088: authorized by Hallie Sims, entered by Heather Lindon on 30.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Pinopsida
 Pinales - Taxaceae
Taxites olriki Heer 1868 yew
Heer
Angiospermae
 Laurales - Lauraceae
Malapoenna cuneata Knowlton 1899 laurel
Knowlton
 Fagales - Juglandaceae
Juglans rugosa Lesquereux 1868 walnut
Lesquereux
 Fagales - Fagaceae
"Fagus undulata" = Fagopsis undulata
"Fagus undulata" = Fagopsis undulata Knowlton 1899
Knowlton
 Rosids - Moraceae
Ficus ungeri Lesquereux 1871 fig
Lesquereux
Polypodiopsida
 Polypodiales - Polypodiidae
Asplenium iddingsi Knowlton 1899 spleenwort
Knowlton
Dryopteris weedii Knowlton 1899
Knowlton