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Scarlet Pimpernels
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Unidentified Plant
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Views from Sibley Volcanic Preserve
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Poison Oak and Peas
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Checker Mallow
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Interior of the Round Top Volcano
Round Top was a volcano that has been dormant about ten million years. Since...
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Lizard!
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Orinda Formation
This is a formation of river gravels, sands and mudstones. The dark...
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Poppy and lupines
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Basaltic Tuffs
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Basaltic tuffs and lava
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Basalt Flow
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Lizard!
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Autobrecciated Lava
This lava is autobrecciated, or self-broken; for it tumbled from the...
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Lava and Tuff Sandwhich
Lava is on the left and right (in shadow), with soft tuff (ash) in between.
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French Broom
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Cinder
Cinder spewed from Round Top, landing while still hot and thus welding...
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Siesta Valley, uplifted
Siesta Valley and Sibley have been lifted up over a thousand feet since Round...
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North America
