The Volcanoes of Sibley

A visit to Berkeley’s Robert Sibley Volcanic Regional Preserve brings many different wonders, from a Labyrinth near the geologic remains of its ancient volcano, to serene cow pastures, to golden eagles  and ferruginous hawks in flight, backlit by the sun against Mt. Tamalpais in the distance.

With incomparable views of Coast Range geology, take a self-guided tour of the park’s volcanoes, stopping at basalt lava, tuff-breccias, red-baked cinder piles, and pebbley mudstones. These are 10-million-year-old consequences of folding and erosion, as the Pacific Plate carried the Round Top volcano north, and twisted it on its side.

At the northwestern edge of the preserve lies a pond oddly close to a highway, yet filled with the songs of spring’s newest bullfrogs. Fat tadpoles or pollywogs glide between submerged forests, mini-Jaws swimming up toward you. As the City’s fog rolls in and envelops the valley in swirling mists, you experience true solitude and serenity.


About thislittleplot

Writer, hiker, loafer
This entry was posted in Geology, Local Area Hikes and trips, Nature, Seasons, Uncategorized and tagged , , , , . Bookmark the permalink.

3 Responses to The Volcanoes of Sibley

  1. tara linda says:

    Gorgeous photos. Sibley is one of my all time favorite E.Bay hiking spots. I love the sweet polliwog ;)

  2. Utherben says:

    These photos are looking good! This Spring has been stressful, but there’s also been opportunities to appreciate beauty on various levels.

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