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The silica found in volcanic ash became dissolved in the percolation fluids
The 19 centimeter long (7
The available morphological characters place the fossil species within the Salicaceae as an immediate sister to the clade containing Populus and Salix
Most orthopterans can generate noise by rubbing special organs together on their legs or on their wings
Eocene Green River Undescribed Birthwort P-PCM-16-062 Lobster The silica found in volcanicUndescribed Birthwort Green River Formation Middle Eocene Lincoln County, Wyoming This fine example is interpreted to be an undescribed Birthwort leaf possible from the family Aristolochiaceae. This specimen is a complete leaf but is folded. Birthworts (also known as pipevine or Dutchman's pipe) are perennial herbaceous plants, shrubs, and vines. There are about 400 living specie today. These plant leaves are rare in the Green River Formation. This
