Well-preserved tooth from Pacific mastodon found in a creek in San Francisco Bay Area

Brigid Lynch discovered a well-preserved fossilized tooth belonging to a Pacific mastodon while conducting fieldwork in a wooded creek located in the mountainous region of the San Francisco Bay Area. The discovery occurred when Lynch noticed an object that appeared distinct from the surrounding rocks she was studying at the time.

The find highlights the presence of prehistoric megafauna in the region. Following the discovery, Lynch has characterized the experience with lighthearted commentary regarding the nature of the find.