Rare rhino fossil preserved by prehistoric volcanic eruption

November 21, 2012 in Other Sciences / Archaeology & Fossils
Credit: Pierre-Olivier Antoine

Less than 2% of the earth's fossils are preserved in volcanic rock, but researchers have identified a new one: the skull of a rhino that perished in a volcanic eruption 9.2 million years ago. The find is described in a paper published November 21 in the open access journal PLOS ONE by Pierre-Olivier Antoine and colleagues from the University of Montpellier, France.

The fossil, found in Turkey, is thought to be that of a large two-horned rhino common in the Eastern Mediterranean region during that period. According to the researchers, unusual features of the preserved skull suggest that the animal was 'cooked to death' at temperatures that may have approached 500° C, in a volcanic flow similar to that of the eruption of Mt. Vesuvius in Italy in 79 A.D.

The rhino's grisly death was near-instantaneous, and followed by severe dehydration in the extreme heat of the eruption. As the researchers describe its end, "the body was baked under a temperature approximating 400°C, then dismembered within the pyroclastic flow, and the skull separated from body". The flow of then moved the skull about 30 km north of the eruption site, where it was discovered by the four member research team.

Credit: Reconstruction by Maëva J. Orliac

Although other researchers have previously identified fossils of soft-bodied organisms preserved in volcanic ash, organic matter near an active is usually quickly destroyed by the , making a fossil such as this one extremely rare.

More information: Antoine P-O, Orliac MJ, Atici G, Ulusoy I, Sen E, et al. (2012) A Rhinocerotid Skull Cooked-to-Death in a 9.2 Ma-Old Ignimbrite Flow of Turkey. PLoS ONE 7(11): e49997. doi:10.1371/journal.pone.0049997

Provided by Public Library of Science

"Rare rhino fossil preserved by prehistoric volcanic eruption" November 21, 2012 http://phys.org/news/2012-11-rare-rhino-fossil-prehistoric-volcanic.html