Daniel Mullen:
Turritella Agate
Daniel Mullen:
Silicatized Silurian Coral (Favosites)
Daniel Mullen:
Milwaukee Formation Shale
Daniel Mullen:
Milwaukee Formation Shale
Daniel Mullen:
Fossil Giant Silverfish
Daniel Mullen:
Fossil Seed Fern Frond
Daniel Mullen:
Fossil Shark Fin
Daniel Mullen:
Milwaukee Formation Shale
Daniel Mullen:
Devonian Horn Coral Pieces
Daniel Mullen:
Crinoid Stems in Silurian Dolomite
Daniel Mullen:
Milwaukee Formation Shale
Daniel Mullen:
Devonian Horn Coral Pieces