Harris Ranch Unit E Silt ( of the United States)
Also known as Blue Ash Channel
Where: Fall River County, South Dakota (43.2° N, 103.2° W: paleocoordinates 44.1° N, 97.3° W)
• coordinate based on political unit
When: Arikareean (30.8 - 20.4 Ma)
• member-level stratigraphic resolution
Environment/lithology: terrestrial
Primary reference: W. F. Simpson. 1985. Geology and paleontology of the Oligocene Harris Ranch Badlands, southwestern South Dakota. Dakoterra 2(2):303-333 [J. Alroy/J. Alroy/J. Marcot]more details
PaleoDB collection 17520: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Marcot and Nicholas Famoso
Creative Commons license: CC BY (attribution)
Taxonomic list
• channel cuts into Brule Fm.; siltstone overlies basal microconglomerate
no evidence of reworking
no evidence of reworking
Show authors, comments, and common names
Mammalia | |
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Rhinocerotidae indet., Woodoceras brachyops n. gen. n. sp.5, Diceratherium annectens5, Diceratherium armatum
Rhinocerotidae indet. Gray 1821 rhinoceros
Diceratherium annectens5 Marsh 1873 rhinoceros "Early Arikareean, Harris Ranch, ?Sharps Formation, Fall River County, South Dakota"
Diceratherium armatum Marsh 1875 rhinoceros | |
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Elomeryx cf. garbanii Macdonald 1970 anthracothere | |
Entelodontidae indet. Lydekker 1883 even-toed ungulate | |
Protoceras skinneri n. sp.
Protoceras skinneri n. sp. Patton and Taylor 1973 protoceratid from "4 feet above a blue ash": see Patton and Taylor 1973
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Agriochoeridae indet. Leidy 1869 agriochoerid | |
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Ansomys cyanotephrus n. sp.3
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Castoridae indet. Gray 1821 beaver |