<p>Meet radiolarian chert, a distinctive Franciscan rock made from "the long snowfall of the sea."</p> <p> It's episode eight of the TRAIL THROUGH TIME, a series of geology videos featuring naturalist Ken Lavin. Sponsored by the Mount Diablo Interpretive Association in partnership with Save Mount Diablo. Videography by Macha Rose. Animations by Tanya Atwater, UC Santa Barbara. Music by Phil Heywood. Produced by Joan Hamilton.</p>

Meet radiolarian chert, a distinctive Franciscan rock made from "the long snowfall of the sea." It's episode eight of the TRAIL THROUGH TIME, a series of geology videos featuring naturalist Ken Lavin. Sponsored by the Mount Diablo Interpretive Association in partnership with Save Mount Diablo. Videography by Macha Rose. Animations by Tanya Atwater, UC Santa Barbara. Music by Phil Heywood. Produced by Joan Hamilton.

Trail Through Time: Episode 8

Audible Mount Diablo is an invitation to adventure. Its free multimedia tours combine lively interviews and music with the rush of wind and the chirps, howls, and growls of wildlife. Naturalists heighten visitors' appreciation of the sights and sounds at each stop, tell tales of the mountain's past, and suggest what to look for around the next bend.  Perfect to prepare for your first--or your hundredth--trip up the mountain. 

Sponsored by Save Mount Diablo and the Mount Diablo Interpretive Association

Produced by Audio Guides to the Outdoors

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Audible Mount Diablo is an invitation to adventure. Its free multimedia tours combine lively interviews and music with the rush of wind and the chirps, howls, and growls of wildlife. Naturalists heighten visitors' appreciation of the sights and sounds at each stop, tell tales of the mountain's past, and suggest what to look for around the next bend. Perfect to prepare for your first--or your hundredth--trip up the mountain. Sponsored by Save Mount Diablo and the Mount Diablo Interpretive Association Produced by Audio Guides to the Outdoors

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Trail Through Time: Episode 8

Trail Through Time: Episode 8