Young Site ( of the United States)
Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.3° N, 98.8° W)
• coordinate based on political unit
• small collection-level geographic resolution
When: Harrison Formation, Harrisonian (24.8 - 18.5 Ma)
• "70 feet below [the] contact with Upper Harrison"
• bed-level stratigraphic resolution
Environment/lithology: terrestrial; unlithified sandstone
• "lens of fine, unconsolidated sand"
Size class: mesofossils
Primary reference: P. O. McGrew. 1937. New marsupials from the Tertiary of Nebraska. Journal of Geology 45(4):448-455 [J. Alroy/J. Alroy/W. Clyde]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 17862: authorized by John Alroy, entered by John Alroy on 26.03.1995
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
| Mammalia | |
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Heteromyidae indet. Gray 1868 rodent | |
"Peratherium youngi n. sp." = Herpetotherium youngi
| |