File:Mammal coprolite (Ash Hollow Formation, Miocene, 11-12 Ma; Ashfall Fossil Beds, Nebraska, USA) 1.jpg
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English: Coprolite from the Miocene of Nebraska, USA. (public display, Ashfall Fossil Beds State Historical Park, Nebraska, USA)
Fossil biogenic products are objects produced by ancient organisms. Many paleontologists refer to these as trace fossils, but they really aren't. Examples of fossil biogenic products include eggs, amber (= fossilized tree sap), coprolites (= fossilized feces), and spider silk. Coprolites are fossilized fecal masses. They range in size from microscopic-sized pellets to moderately sizable dung piles. The most famous attributed examples are “Washington coprolites” from the Miocene Wilkes Formation of Washington State, USA, but these are now considered cololites (intestinal casts). True coprolites are fossilized dung. Thin sections of coprolites often reveal fragments of incompletely digested plant matter or sometimes undigested animal tissue. Coprolite studies can provide information about the diet of ancient organisms, assuming the coprolite maker is known with some specificity (which is often not the case). This Miocene-aged coprolite is from Ashfall Fossil Beds in Nebraska. The site consists of numerous fossils in a wind-blown deposit of volcanic ash derived from an Idaho volcano. From exhibit signage: Coprolites These coprolites (fossil dung) were found just below the volcanic ash bed. They are made almost entirely of ground-up bones. Judging from their size and composition, these no-longer-fragrant feces were probably produced by the extinct bone-crushing dog Aelurodon, a wolf-sized scavernger that patrolled the Ashfall waterhole. Stratigraphy: Cap Rock Member, Ash Hollow Formation, Ogallala Group, Miocene, 11-12 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@N05/52269213280/ |
| 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@N05/52269213280. 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. |
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| current | 19:12, 12 November 2022 | | 1,231 × 774 (825 KB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52269213280/ with UploadWizard |
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