James St. John:
Girkin Limestone (Upper Mississippian; entrance to Great Onyx Cave, Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 1
James St. John:
Girkin Limestone (Upper Mississippian; entrance to Great Onyx Cave, Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 2
James St. John:
Girkin Limestone (Upper Mississippian; entrance to Great Onyx Cave, Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 3
James St. John:
Girkin Limestone (Upper Mississippian; entrance to Great Onyx Cave, Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 4
James St. John:
Girkin Limestone (Upper Mississippian; entrance to Great Onyx Cave, Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 5
James St. John:
Girkin Limestone (Upper Mississippian; entrance to Great Onyx Cave, Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 6
James St. John:
Entrance to Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 1
James St. John:
Entrance to Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 2
James St. John:
Girkin Limestone (Upper Mississippian; entrance to Great Onyx Cave, Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 7
James St. John:
Girkin Limestone (Upper Mississippian; entrance to Great Onyx Cave, Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 8
James St. John:
Forest near entrance to Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA)
James St. John:
Entrance stairs of Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 1
James St. John:
Ceuthophilus stygius (camel cricket) inside entrance to Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 1
James St. John:
Ceuthophilus stygius (camel cricket) inside entrance to Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 2
James St. John:
Entrance stairs of Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 2
James St. John:
Entrance stairs of Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 3
James St. John:
Travertine speleothem in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 1
James St. John:
Travertine stalactites in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 1
James St. John:
Travertine stalactites in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 2
James St. John:
Travertine drapery in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 1
James St. John:
Travertine draperies & stalactites in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 1
James St. John:
Travertine flowstone-covered column in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 1
James St. John:
Travertine flowstone in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 1
James St. John:
Travertine flowstone-covered stalagmite in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 1
James St. John:
Travertine flowstone-covered column in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 2
James St. John:
Travertine column & stalagmite in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 1
James St. John:
Travertine stalactites in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 3
James St. John:
Coralloid-covered stalagmite in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA)
James St. John:
Travertine flowstone-covered stalagmite in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 2
James St. John:
Travertine stalactites in Great Onyx Cave (Flint Ridge, Mammoth Cave National Park, Kentucky, USA) 4
