https://www.ksbw.com/article/monterey-bay-mammoth-tusk-science-mbari/38326538#
Of all the unusual things to find, researchers at Monterey Bay Aquarium Research Institute (MBARI) found and retrieved a mammoth tusk at a depth of ~3,000m (10,000 ft) off the coast of California!
“This specimen’s deep-sea preservational environment is different from almost anything we have seen elsewhere,” said University of Michigan paleontologist Daniel Fisher, 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.”
Full article at: KSBW.com 23nov21