Rock & Gem

DAWN REDWOOD: THE BIRTH OF THE TALLEST TREES ON EARTH

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In California, redwoods on the coast and in the Sierra Nevada draw tourists. These are sequoias, which evolved from an evergreen called Metasequoi­a. Metasequoi­a was thought to be extinct until a grove was discovered in China. From there, it’s been reintroduc­ed into America, just like the ginkgo. During the Age of Dinosaurs and well into the Age of Mammals, Metasequoi­a and its kin ranged across the Northern Hemisphere. While not exactly part of the Jurassic Forest, Metasequoi­a fossils were common in forests from the Late Cretaceous Periods into the Miocene Epoch.

 ?? ?? A living redwood, or sequoia tree, in southern California.
A living redwood, or sequoia tree, in southern California.

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