File:Pseudhipparion gratum (small three-toed horse foot) (Ash Hollow Formation, Miocene; Ashfall Fossil Beds, Nebraska, USA) 1.jpg

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English: Pseudhipparion gratum (Leidy, 1869) - diseased left foot bones from a small three-toed horse from the Miocene of Nebraska, USA.

This horse fossil was excavated from a volcanic ash deposit at Nebraska's Ashfall Fossil Beds. The ash was derived from the Bruneau-Jarbidge Volcanic Field in southwestern Idaho's Snake River Plain. The wind-blown ash buried a vertebrate-rich biota at what was originally a Miocene waterhole.


From on-site signage:

Some Ashfall skeletons bear evidence of disease or injury from a time long before the ash fell. This badly diseased left hind foot, for example, is from a small 3-toed stallion; . . . his right foot is normal. The diseased foot may have suffered a severe kick or bite which later became infected.


Classification: Animalia, Chordata, Vertebrata, Mammalia, Perissodactyla, Equidae

Stratigraphy: Cap Rock Member, Ash Hollow Formation, Ogallala Group, Miocene, 11.83 Ma

Locality: Ashfall Fossil Beds State Historical Park, northeastern Nebraska, USA


Info. at:

en.wikipedia.org/wiki/Ashfall_Fossil_Beds
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Source https://www.flickr.com/photos/47445767@N05/52303526227/
Author James St. John

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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/52303526227. It was reviewed on 15 November 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

15 November 2022

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current19:22, 12 November 2022Thumbnail for version as of 19:22, 12 November 20222,511 × 586 (934 KB)Ser Amantio di Nicolao (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52303526227/ with UploadWizard

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