Crooked Creek (USNM 14091) (Eocene of the United States)

Where: Dunn County, North Dakota (47.2° N, 102.8° W: paleocoordinates 51.1° N, 84.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Camels Butte Member (Golden Valley Formation), Wasatchian (55.8 - 50.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: "channel"; yellow claystone

Size class: macrofossils

Preservation: adpression

Reposited in the USNM

Collection methods: quarrying,

Primary reference: L. J. Hickey. 1977. Stratigraphy and paleobotany of the Golden Valley Formation (Early Tertiary) of western North Dakota. The Geological Society of America Memoir 150:1-183 [H. Sims/S. Ostrowski/J. Cassara]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 10973: authorized by Hallie Sims, entered by Summer Ostrowski on 08.07.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

Lycopodiopsida
 Isoetales - Isoetaceae
Isoetites horridus Dawson 1883 clubmoss
Polypodiopsida
 Salviniales - Polypodiidae
Salvinia preauriculata Berry 1925 watermoss
 Schizaeales - Polypodiidae
Lygodium kaulfussi Heer climbing fern
Angiospermae
 Malvales - Sterculiaceae
Dombeya novimundi Hickey 1977
 Oxalidales - Oxalidaceae
Averrhoites affinis Newberry 1868 wood sorrel
 Rosales - Ulmaceae
Chaetoptelea microphylla Newberry 1868 elm
 Proteales - Nelumbonaceae
Nelumbo aureavallis Hickey 1977 lotus
 Typhales - Commelinidae
Sparganium stygium Heer 1855 bur-reed