Hell's Hollow Channel: Puercan, Montana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Cimolestidae
Procerberus formicarum Sloan and Van Valen 1965
Archibald 1982
Mammalia - Procreodi - Arctocyonidae
Mimatuta morgoth Van Valen 1978
Archibald 1982
Ragnarok engdahli n. sp. Archibald 1982
Archibald 1982
recombined as Baioconodon engdahli
(1 measurement)
Oxyprimus erikseni Van Valen 1978
Archibald 1982
Mammalia
Peradectes pusillus (Matthew and Granger 1921)
Archibald 1982
    = Thylacodon cf. pusillus Matthew and Granger 1921
Alroy 2002
Mammalia - Multituberculata - Neoplagiaulacidae
Mesodma garfieldensis Archibald 1982
Archibald 1982
synonym of Mesodma thompsoni
Mammalia - Multituberculata - Taeniolabididae
Catopsalis cf. foliatus Cope 1882
Archibald 1982
    = Catopsalis alexanderi Middleton 1982
Middleton 1982
see common names

Geography
Country:United States State/province:Montana County:Garfield
Coordinates: 47.6° North, 107.0° West (view map)
Paleocoordinates:53.9° North, 81.8° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Paleocene
Stage:Danian 10 m.y. bin:Cenozoic 1
*Period:Tertiary
Key time interval:Puercan
Age range of interval:66.00000 - 63.30000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Tullock
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: sandstone
Includes fossils?Y
Environment:coarse channel fill
Taphonomy
Modes of preservation:body
Size of fossils:mesofossils
Collection methods and comments
Collection methods:bulk,surface (float),sieve,field collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:UCMP
Taxonomic list comments:"Hell's Hollow local fauna" of Archibald and Clemens 1984 appears to be a composite list
between the IrZ and HFZ coals and seems NOT to include reworked specimens: Swisher et al. 1993; dates on these coals are:
IrZ = 65.16 +/- 0.04 Ma
HFZ = 64.77 +/- 0.06 Ma
average is 64.965 Ma
see also Dalrymple et al. 1993, who give a mean of 26 K-T dates of 64.6 +/- 0.1 Ma
Metadata
Also known as:UCMP V-74110
Database number:14742
Authorizer:J. Alroy Enterer:J. Alroy
Modifier:M. Uhen Research group:vertebrate
Created:2002-05-15 00:00:00 Last modified:2017-12-01 10:42:56
Access level:the public Released:2002-05-15 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

959. J. D. Archibald. 1981. The earliest known Palaeocene mammal fauna and its implications for the Cretaceous–Tertiary transition. Nature 291:650-652 [J. Alroy/J. Alroy/J. Ju]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
960 J. D. Archibald. 1982. A study of Mammalia and geology across the Cretaceous-Tertiary boundary in Garfield County, Montana. University of California Publications in Geological Sciences 122:1-286 [J. Alroy/J. Alroy/M. Carrano]
2584 M. D. Middleton. 1982. A new species and additional material of Catopsalis (Mammalia, Multituberculata) from the Western Interior of North America. Journal of Paleontology 56(5):1197-1206 [J. Alroy/J. Alroy/P. Mannion]