Ancient Mastodon Tooth Unearthed in San Mateo County Creek
A fossilized Pacific mastodon tooth, believed to be at least 10,000 years old and found in immaculate condition, was discovered in a California creek bed in San Mateo County.
San Francisco Oakland San Jose, CA, September 11, 2026 — A fossilized tooth belonging to a Pacific mastodon has been discovered in San Mateo County, California. The tooth is estimated to be at least 10,000 years old.
The discovery was made in a creek bed within San Mateo County. According to the information provided, the ancient tooth was found in what has been described as “immaculate condition.” The specific location of the creek and the circumstances surrounding the discovery, including who found the tooth, were not detailed in the summary.
Pacific mastodons (Mammut pacificus) are an extinct species of proboscidean that once roamed parts of North America. This particular specimen is believed to date back a minimum of 10,000 years, placing it within the late Pleistocene epoch. The condition of the fossil is noted as exceptional, suggesting it may have been well-preserved over millennia.
Further details regarding the scientific significance of the find, the exact age calibration methods used, or any plans for further excavation or study are not available. The contractor who may have been involved in the discovery was also not identified. Information concerning any potential permits, inspection outcomes, or fines related to this finding was not provided.
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