Interesting news from the Monterey Bay Aquarium Research Institute (MBARI).
While exploring a seamount by ROV from aboard the R/V Western Flyer in 2019 the MBARI team spotted what looked like an elephant’s tusk. The seamount is located 300 kilometers (185 miles) offshore of California and is 3,070 meters (10,000 feet) deep.
Only able to collect a small piece at the time, MBARI returned in July 2021 to retrieve the complete specimen. Now researchers are examining the tusk and have confirmed that the tusk—about one meter (just over three feet) in length—is from a Columbian mammoth (Mammuthus columbi). The cold, high-pressure environment of the deep sea uniquely preserved the tusk, giving researchers the opportunity to study it in greater detail. Computed tomography (CT) scans will reveal the full three-dimensional internal structure of the tusk and more information about the animal’s history, such as its age.
“This specimen’s deep-sea preservational environment is different from almost anything we have seen elsewhere,” said University of Michigan paleontologist Daniel Fisher, one of the researchers studying the tusk, who specializes in the study of mammoths and mastodons. “Other mammoths have been retrieved from the ocean, but generally not from depths of more than a few tens of meters.”
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