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News

The Mercury News
mercurynews.com > 09/09/2026 > immaculate-condition-rare-mastodon-fossil-found-in-san-mateo-county-creek

‘Immaculate condition:’ Rare mastodon fossil found in San Mateo County creek

4+ day, 14+ hour ago   (513+ words) Brigid Lynch was walking through a redwood forest in the San Mateo County hills when she noticed something unusual, half-submerged in the flowing water of a creek: a big smooth object that didn’t look like any of the other rocks....