Fossil Evergreen Live Oak Leaf From Aldrich Hill, Nevada

Here is a complete leaf from an evergreen live oak called Quercus pollardiana from the middle Miocene Aldrich Station Formation, Aldrich Hill, Nevada. This particular species of fossil oak is allied with the modern maul oak, Quercus chrysolepis, which is presently native to the western slopes of the Sierra Nevada and the Coastal Ranges of California; note the entire margin (smooth, without spinose indentations) of the fossil leaf. Modern maul oaks can produce on the same tree leaves that are entire and others that are spinose. The specimen is 35mm long.

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