James St. John:
Athabasca Tar Sand (near Fort McMurray, Alberta, Canada)
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 1
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 2
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 3
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 4
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 5
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 6
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 7
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 8
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 9
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 10
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 11
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 12
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 13
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 14
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 15
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 16
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 17
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 18
James St. John:
Tar sandstone (Monterey Formation, Miocene, 10-12 Ma; southern California, USA) 19