Where: Stark County, North Dakota (46.9° N, 102.1° W: paleocoordinates 51.2° N, 82.0° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Bear Den Member (Golden Valley Formation), Clarkforkian (56.8 - 55.8 Ma)
• bed-level stratigraphic resolution
Environment/lithology: "channel"; siltstone and sandstone
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 10808: authorized by Hallie Sims, entered by Summer Ostrowski on 25.06.2001
Creative Commons license: CC BY (attribution)
Taxonomic list
Polypodiopsida | |
| |
Angiospermae | |
Averrhoites affinis Newberry 1868 wood sorrel | |
"Carya antiquorum" = Hicoria antiquora
"Carya antiquorum" = Hicoria antiquora Newberry 1868 | |
Cercidiphyllum genetrix Newberry 1868 katsura
Trochodendroides serrulata Wolfe 1966 | |
Meliosma longifolia Hickey 1977 | |
Musophyllum complicatum Lesquereux 1874 |