10,000-Year-Old Pacific Mastodon Tooth Discovered in California Creek Bed
A fossilized Pacific mastodon tooth, estimated to be at least 10,000 years old and described as being in "immaculate condition," was recently discovered in a creek bed in San Mateo County, California. The discovery was made during field surveys for a habitat enhancement project within a Midpeninsula (Midpen) Regional Open Space District preserve. Initially mistaken for an oddly shaped rock, paleontologists later confirmed it to be an intact molar from an adult Pacific mastodon. Wayne Thompson, a paleontologist and owner of Pacific Paleontology, called it the "most complete mastodon molar from our area, and the most spectacular mastodon molar that I've ever seen." The tooth measures approximately 8.5 inches long, 7 inches deep, and 3 inches wide. The Pacific mastodon, a massive herbivore, roamed California, Oregon, the northern Rocky Mountains, and parts of Mexico during the Pleistocene epoch, going extinct around 11,700 years ago.