Bituminous Coal #1
Photo Researchers
Bituminous Coal
Photo Researchers
Bituminous Coal #1
Andrew J. Martinez
Bituminous Coal
A.b. Joyce
Bituminous Coal #2
Photo Researchers
Bituminous Coal #3
Photo Researchers
Bituminous Coal
Andrew J. Martinez
Bituminous Coal Cleaning Plant
Theodore Clutter
Homer City Coal-fired Power Plant
Theodore Clutter
Fossil Turtle
John Cancalosi/Okapia
Neuropteris Fossil #1
Theodore Clutter
Oil Sandstone Bituminous Sandstone
Ted Kinsman
Burning Bituminous Coal
Theodore Clutter
Calamites Fossil
Theodore Clutter
Calamites Fossil #1
Theodore Clutter
Neuropteris & Alethopteris Fossils
Theodore Clutter
Pecopteris Fossil #1
Theodore Clutter
Calamites Fossil #2
Theodore Clutter
Sphenophyllum & Neuropteris Fossils
Theodore Clutter
Early Insectivore Fossil
Gary Retherford
Cooling Towers
Theodore Clutter
Lepidodendron Fossil
Theodore Clutter
Eremopteris Fossil
Theodore Clutter
Neuropteris Fossil
Theodore Clutter
Lepidodendron Fossil #1
Theodore Clutter
Sigillaria Fossil
Theodore Clutter
Neuropteris & Alethopteris Fossils #1
Theodore Clutter
Cyclopteris Fossil
Theodore Clutter
Homer City Power Plant And Transmission
Theodore Clutter
Pecopteris Fossil
Theodore Clutter
Alethopteris Fossil
Theodore Clutter
Cooling Towers #1
Theodore Clutter
Alethopteris Fossil #1
Theodore Clutter