Name: Zelkova
nervosa
Division:
Magnoliophyta; Class: Magnoliopsida; Order: Rosales; Family: Ulmaceae
Geological
Time: Eocene
Size (25.4
mm = 1 inch): Leaf: 45 mm by 9 mm Matrix: 77 mm by 58 mm
Fossil
Site: Green River Shale, Uintah County, Utah
This
fossil leaf from a member of the Ulmaceae, or Elms. The closest
living relative is Zelkova serrata which has strongly serrated leaf
margins, and is a popular cultivated tree from Japan. The genus
went extinct in North America during the Tertiary. The deep brown
color is a fine contrast to the light shale matrix, with the leaf
well centered on the plate.
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