Sequoia sempervirens (fossil redwood tree trunk) (Sonoma Volcanics, Upper Pliocene, 3.2 to 3.4 Ma; Calistoga Petrified Forest, Calistoga, California, USA) 96
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/47445767@N05">James St. John</a>
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<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/jsjgeology/49106747678/">Sequoia sempervirens (fossil redwood tree trunk) (Sonoma Volcanics, Upper Pliocene, 3.2 to 3.4 Ma; Calistoga Petrified Forest, Calistoga, California, USA) 96</a>