Also known as Arlington 15; UO 2322
Where: Gilliam County, Oregon (45.7° N, 120.2° W: paleocoordinates 45.6° N, 117.5° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Alkali Canyon Formation, Hemphillian (10.3 - 4.9 Ma)
• "relatively thin stratigraphic unit"; see Martin 1998 for stratigraphic nomenclature
• member-level stratigraphic resolution
Environment/lithology: terrestrial; unlithified, tuffaceous sandstone and tuff
Size class: macrofossils
Collection methods: surface (float),
• "collection on hands and knees" from a blowout
Primary reference: J. A. Shotwell. 1958. Inter-community relationships in Hemphillian (mid-Pliocene) mammals. Ecology 39(2):271-282 [J. Alroy/J. Alroy/W. Clyde]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 18939: authorized by John Alroy, entered by John Alroy on 27.09.1993
Creative Commons license: CC BY (attribution)
Taxonomic list
•a UO specimen of Megalonyx sp. is from one of the Krebs Ranch localities: Hirschfeld and Webb 1968
•NISP 86, excluding 5 generically indeterminate records
Mammalia | |
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Perognathus stevei4 Martin 1984 pocket mouse UWBM B1532 (Arlington 3), B1533 (Arlington 4), B1534 (Arlington 5), C0120 (Arlington 7), C0125 (Arlington 12), C0126 (Arlington 13), C0127 (Arlington 14), C0141 (Arlington 15) DUPLICATE REF 2411 or 2424
Oregonomys pebblespringsensis n. sp.4 Martin 1984 rodent UWBM C0127 (Arlington 14); also B1532 (Arlington 3), B1533 (Arlington 4), B1534 (Arlington 5), C0120 (Arlington 7), C0121 (Arlington 8), C0125 (Arlington 12), C0126 (Arlington 13), C0141 (Arlington 15) DUPLICATE REF 2411 or 2424
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Dipoides sp. Jaeger 1835 beaver | |
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