Also known as JHH L6424
Where: Dawson County, Montana (47.1° N, 104.8° W: paleocoordinates 53.1° N, 79.7° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: lower Ludlow Member (Fort Union Formation), Puercan (66.0 - 63.3 Ma)
• within a sandstone with no paleomagnetic data just above C29r and just below C29n
• bed-level stratigraphic resolution
Environment/lithology: "channel"; sandstone
Primary reference: J. P. Hunter. 1997. Mammals and mollusks across the Cretaceous-Tertiary boundary from Makoshika State Park and vicinity (Williston Basin), Montana. Contributions to Geology, University of Wyoming 32(1):61-114 [J. Alroy/J. Alroy/M. Uhen]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 14745: authorized by John Alroy, entered by John Alroy on 21.09.1998
Creative Commons license: CC BY (attribution)
Taxonomic list
| Mammalia | |
|
Eucosmodontidae indet. Jepsen 1940 multituberculate | |
|
Onychodectes tisonensis Cope 1888 taeniodont | |
|
Eoconodon ? nidhoggi Van Valen 1978 placental | |
Baioconodon cf. nordicus, ? Loxolophus sp., Loxolophus schizophrenus, ? Carcinodon sp., ? Oxyclaenus sp.
? Loxolophus sp. Cope 1885 condylarth
Loxolophus schizophrenus Johnston and Fox 1984 condylarth
? Carcinodon sp. Scott 1892 condylarth
? Oxyclaenus sp. Cope 1884 condylarth | |
|
Oxyacodon ferronensis Archibald et al. 1983 condylarth
Oxyacodon apiculatus Osborn and Earle 1895 condylarth
Tinuviel eurydice Van Valen 1978 condylarth | |