Where: Mercer County, North Dakota (47.3° N, 102.1° W: paleocoordinates 51.6° N, 81.9° 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"; 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 10810: authorized by Hallie Sims, entered by Summer Ostrowski on 25.06.2001
Creative Commons license: CC BY (attribution)
Taxonomic list
Angiospermae | |
Canariophyllum ampla n. gen. n. sp.
Canariophyllum ampla n. gen. n. sp. Hickey 1977 | |
Corylus acutertiaria Hickey 1977 hazel | |
Averrhoites affinis Newberry 1868 wood sorrel | |
"Ampelopsis" acerifolia Newberry 1868 | |
Meliosma longifolia Hickey 1977 | |
"Viburnum" antiquum Newberry 1868 honeysuckle | |
Persites argutus Hickey 1977 laurel | |
Porosia verrucosa Lesquereux 1878 | |
Dicotyledoneae | |
"Trapa" angulata Brown 1962 water caltrop | |
Metasequoia occidentalis Chaney 1951 dawn redwood | |
Magnoliopsida | |
Dicotylophyllum mercerensis n. sp. Hickey 1977
Dicotylophyllum anomalum Ward 1887 | |
Protophyllum | |
Protophyllum semotum Hickey 1977 | |
Polypodiopsida | |
| |
Viburnum cupanioides | |
""Viburnum" cupanioides" = Beringiaphyllum cupanioides
""Viburnum" cupanioides" = Beringiaphyllum cupanioides Manchester et al. 1999 |