Where: Dunn County, North Dakota (47.4° N, 103.0° W: paleocoordinates 51.8° N, 82.9° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Bear Den Member (Golden Valley Formation), Clarkforkian (56.2 - 54.9 Ma)
• bed-level stratigraphic resolution
Environment/lithology: "channel"; conglomeratic siltstone
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 10983: authorized by Hallie Sims, entered by Summer Ostrowski on 08.07.2001
Creative Commons license: CC BY (attribution)
Taxonomic list
Polypodiopsida | |
Osmunda sp. Linnaeus 1753 | |
Angiospermae | |
Meliosma longifolia Hickey 1977 | |
Cercidiphyllum genetrix Newberry 1868 katsura | |
Menispermites parvareolatus Hickey 1977 | |
Averrhoites affinis Newberry 1868 wood sorrel | |
Corylus acutertiaria n. sp.
Corylus acutertiaria n. sp. Hickey 1977 hazel | |
Metasequoia occidentalis Chaney 1951 dawn redwood | |
Viburnum cupanioides | |
""Viburnum" cupanioides" = Beringiaphyllum cupanioides
""Viburnum" cupanioides" = Beringiaphyllum cupanioides Manchester et al. 1999 |