Above is an image of a tree fern frond plant fossil called  Crenulopteris acadica (Bell, 1962). This plant fossil dates to the Carbonifero...

  Above is an image of a tree fern frond plant fossil called  Diplazites unita (Brongniart, 1822) Cleal, 2015 .  This plant fossil dates to ...

  Above is an image of a horsetail trunk plant fossil called  Calamites sp.  This plant fossil dates to the Carboniferous (Pennsylvanian) Pe...