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marlstone and lacustrine limestone (micrite
and another with near-shore brackish or marine fossils such as jellyfish
covered with pollen
Marlstone and volcanic tuff are interstratified with oil shale
Middle Pennsylvanian
Eocene Green River Aralia P-GR-16-Leaf001 Upper Cretaceous marlstone and lacustrine limestone (micriteUndescribed Leaf Family Araliaceae Green River Formation Middle Eocene Lincoln County, Wyoming This is a beautiful leaf from the Family Araliaceae. The specimen is part and counterpart. The leaf has superb venation, and the margin detail is excellent. This example is collected from the 18 inch layer. Fossil examples of the Family Araliaceae are undescribed in the scientific literature. There are over 250 living species found all over the world today
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