What’s the Deal With People Finding Human Fossils in Their Travertine Tiles?

April 17, 2024
1 min read
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One European family’s recent home renovation is a literal jaw dropper. According to a Reddit user who shared images on the website’s fossils subreddit (r/fossils), their family noticed a peculiar item in their floors after installing new travertine tiles—something that looked eerily like a human jaw. “This looks like a section of [a] mandible,” the user wrote. “Could it be a hominid? Is it usual?”

According to Dr. Andrew Leier, chair of the Geological Society of America’s sedimentary geology division and an associate professor at the University of South Carolina, finding fossils in travertine is well within the realm of possibility. “It’s somewhere between uncommon and common” he says. “But it’s not a crazy thing to happen.” Travertine is a type of limestone that forms when calcium carbonate that’s dissolved in water precipitates (that is, it becomes a solid) because of a change in chemical conditions. Usually this happens around hot springs when the water emerges from the ground. “As the water comes out, it forms a thin layer of the rock, then another, then another.”

Travertine often forms at the mouth of hot springs, as seen here.

Photo: Frank Fichtmüller/Getty Images

While this process is happening, anything around the spring can become coated and ensconced in the calcium carbonate, Dr. Leier explains. This could be leaves, feathers, even animals that have died nearby. The Getty Center in Los Angeles, which is clad in travertine, famously features a number of fossils on its exterior, which have become something of a scavenger hunt for those who know where to look.

According to the original Reddit poster, their family believes the travertine came from Turkey, which Dr. Leier says is a common place where the stone is quarried. “The item found in the travertine floors could have been something that died around the spring or died somewhere else and was washed into the region and covered in the travertine. Those are the two most likely scenarios,” Dr. Leier explains. But is it a human jaw?

“It absolutely looks like one,” say Amber D. Riley, MS, RDH, the immediate past president of American Society of Forensic Odontology, and Anthony R. Cardoza, DDS, a forensic dentistry consultant, in a joint email to AD. The arch shape and tooth anatomy appear human, but perhaps the most unusual finding is that it looks like the person may have had dental work done. “There appear to be absent teeth and the bone tissue has filled into where the teeth once were. Another human potentially intervened and removed teeth due to injury or disease,” they explain.



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