Iron Mountain Bed: Burdigalian, Oregon

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Carnivora
Pteronarctos goedertae Barnes 1989
Berta 1994 5 specimens
several specimens in Berta 1994 have different locality descriptions, but all are about the same place
Pteronarctos piersoni n. sp. Barnes 1990
Barnes 1990 1 specimen
synonym of Pteronarctos goedertae
Pacificotaria hadromma n. gen., n. sp. Barnes 1992
Barnes 1992 1 specimen
synonym of Pteronarctos goedertae
Mammalia - Carnivora - Desmatophocidae
Allodesminae indet. (Kellogg 1931)
Barnes and Hirota 1995
Desmatophoca oregonensis Condon 1906
Barnes 1987 1 specimen
Mammalia - Carnivora - Odobenidae
Proneotherium repenningi n. gen., n. sp. Kohno et al. 1995
Kohno et al. 1995 1 specimen
Mammalia - Perissodactyla - Chalicotheriidae
Tylocephalonyx sp. Coombs 1979
Mammalia - Perissodactyla - Rhinocerotidae
Aphelops sp. Owen 1845
Munthe and Coombs 1979
"rhino"; Coombs' text post-dates Munthe and Coombs
Mammalia - Perissodactyla - Desmostylidae
Desmostylus sp. Marsh 1888
Mitchell and Repenning 1963
    = Desmostylus hesperus Marsh 1888
Domning 2008
Mammalia - Cetacea - Cetotheriidae
Cophocetus oregonensis Packard and Kellogg 1934
Packard and Kellogg 1934 1 specimen
see common names

Geography
Country:United States State/province:Oregon County:Lincoln
Coordinates: 44.7° North, 124.1° West (view map)
Paleocoordinates:44.5° North, 118.0° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Miocene
Stage:Burdigalian 10 m.y. bin:Cenozoic 5
*Period:Late/Upper Tertiary *Epoch:Early/Lower Miocene
Key time interval:Burdigalian
Age range of interval:20.44000 - 15.97000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Astoria
Stratigraphic resolution:bed
Stratigraphy comments: early Miocene
uncomformably overlain by Depoe Bay Basalt, dated at 16 +/- 0.65, 15.2 +/- 0.6, and 14.5 +/- 1.0 Ma using KA; dates are from different localities and it is not clear which is most relevant; old constants used
overlain by the slightly higher Cape Foulweather Basalt = Gingko Basalt, dated at 15.4 +/- 0.3 Ma (mehtod?): Prothero et al. 2001
in a reversed polarity zone interpreted as C5Cr: Prothero et al. 2001
Lithology and environment
Primary lithology:concretionary,brown,gray sandstone
Includes fossils?Y
Lithology description: "light-brown to dark-gray sandstone nodules": Prothero et al. 2001
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (float)
Reason for describing collection:taxonomic analysis
Taxonomic list comments:see also Munthe and Coombs 1979
Metadata
Also known as:Schooner Point
Database number:18929
Authorizer:J. Alroy, M. Uhen Enterer:J. Alroy, M. Uhen
Modifier:M. Uhen Research group:vertebrate
Created:1995-03-26 00:00:00 Last modified:2008-08-19 10:33:25
Access level:the public Released:1995-03-26 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

1275. M. C. Coombs. 1979. Tylocephalonyx, a new genus of North American dome-skulled chalicotheres (Mammalia, Perissodactyla). Bulletin of the American Museum of Natural History 164(1):1-64 [J. Alroy/J. Alroy/M. Uhen]

Secondary references:

16774 L. G. Barnes. 1987. An early Miocene pinniped of the genus Desmatophoca (Mammalia: Otariidae) from Washington. Contributions in Science 382:1-20 [M. Uhen/M. Uhen]
16775 L. G. Barnes. 1990. A new Miocene enaliarctine pinniped of the genus Pteronarctos (Mammalia: Otariidae) from the Astoria Formation, Oregon. Contributions in Science 422:1-20 [M. Uhen/M. Uhen]
16769 L. G. Barnes. 1992. A new genus and species of middle Miocene enaliarctine pinniped (Mammalia, Carnivora, Otariidae) from the Astoria Formation in Coastal Oregon. Contributions in Science 431:1-27 [M. Uhen/M. Uhen]
16919 L. G. Barnes and K. Hirota. 1995. Miocene pinnipeds of the otariid subfamily Allodesminae in the North Pacific Ocean: Systematics and relationships. The Island Arc 3:329-360 [M. Uhen/M. Uhen]
16743 A. Berta. 1994. New specimens of the pinnipediform Pteronarctos from the Miocene of Oregon. Smithsonian Contributions to Paleobiology 78:1-30 [M. Uhen/M. Uhen]
30424 D. P. Domning. 2008. Desmostylia. In C. M. Janis, G. F. Gunnell, M. D. Uhen (eds.), Evolution of Tertiary Mammals of North America, Volume II 640-645 [M. Uhen/M. Uhen]
16898 N. Kohno, L. G. Barnes, and K. Hirota. 1995. Miocene fossil pinnipeds of the genera Prototaria and Neotherium (Carnivora; Otariidae; Imagotariinae) in the North Pacific Ocean: Evolution, relationships and distribution. The Island Arc 3:285-308 [M. Uhen/M. Uhen]
16802 E. D. Mitchell and C. A. Repenning. 1963. The chronologic and geolographic range of desmostylians. Contributions in Science 78:1-20 [M. Uhen/M. Uhen]
2635 J. Munthe and M. C. Coombs. 1979. Miocene Dome-Skulled Chalicotheres (Mammalia, Perissodactyla) from the Western United States: A Preliminary Discussion of a Bizarre Structure. Journal of Paleontology 53(1):77-91 [J. Alroy/J. Alroy/M. Uhen]
12700 E. L. Packard and R. Kellogg. 1934. A new cetothere from the Miocene Astoria Formation of Newport, Oregon. Contributions to Palaeontology Carnegie Institution of Washington 447(I):3-62 [M. Uhen/M. Uhen/M. Uhen]
7760 D. R. Prothero, C. Z. Bitboul, G. W. Moore and E. J. Moore. 2001. Magnetic stratigraphy of the lower and middle Miocene Astoria Formation, Lincoln County, Oregon. Magnetic Stratigraphy of the Pacific Coast Cenozoic (D. R. Prothero, ed.) 272-283 [J. Alroy/J. Alroy/J. Alroy]