Ancient Mastodon Tooth From the Ice Age Discovered in California’s Bay Area

A fossilised tooth belonging to a prehistoric relative of the modern elephant has been unearthed in northern California, offering scientists a remarkable glimpse into the region’s Ice Age past. The tooth is understood to have belonged to a Pacific mastodon that once roamed North America.

Geomorphologist Brigid Lynch made the discovery while working on a habitat restoration project along a creek in San Mateo County, located south of San Francisco. The tooth was partially submerged in the water, protruding distinctly from the surrounding rocks.

“It was just sitting there in the middle of the creek, halfway in, half out of water,” Lynch said.

Initially, Lynch and her colleagues were uncertain about what they had found. The fossil was ultimately identified through a reverse image search.

“Very immediately, it popped up with this is a Pacific mastodon molar fossil,” Lynch said.

From Creek to Collection

Researchers report that the tooth is in remarkably good condition, with both its crown and root fully intact.

Chrissy Garcia, curator at Stanford University’s Geoscience Specimen Collection, said scientists were already aware that mastodons and mammoths had inhabited the Bay Area during the Pleistocene Epoch. However, she expressed surprise at the manner in which this particular fossil had been found.

The tooth has been donated to Stanford University, where researchers aim to determine its precise age and produce a 3D replica for public educational purposes.

Scientists say the specimen may also open new avenues for research as technology advances and fresh scientific questions arise.

The discovery underscores the importance of protected open spaces in preserving evidence of the region’s ancient history.

For thousands of years, the mastodon’s tooth lay hidden beneath a California creek bed. Today, it serves as a window into a world that vanished long before the modern Bay Area took shape.

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