Example image of eyePlorer eyePlorer map for 'Marcellus Formation': Geological unit Hamilton Group North America Sedimentary rock Appalachian Mountains Marcellus (village), New York Outcrop East Coast of the United States Energy development Natural gas Devonian Stratigraphy Fossil Interbedding Limestone Petrology Sedimentary depositional environment Shale Paleontology Stage (stratigraphy) Iron ore Pyrite Uranium Civil engineering Environmental engineering Erosion Fissility (geology) Bed (geology) Carbonaceous Carbonate Iron Siderite Sulfur Calcium Gypsum Hydrate Rust Sulfate Acid mine drainage Efflorescence Hydroxide Limonite Mineralization (geology) Oxygen Euhedral Framboid Radioactive decay Radon Source rock Uranium-238