porcellanite
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Porcellanite (Middle Miocene, ~11 to 14.7 Ma; Bučník Hill Quarry, near the town of Komňa, Czech Republic)
by James St. John
by James St. John
サイズ変更など
Baked sedimentary xenoliths in clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 1
by James St. John
by James St. John
Baked sedimentary xenoliths in clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 2
by James St. John
by James St. John
Buchite clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA)
by James St. John
by James St. John
Clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 1
by James St. John
by James St. John
Clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 2
by James St. John
by James St. John
Clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 3
by James St. John
by James St. John
Clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 4
by James St. John
by James St. John
Clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 5
by James St. John
by James St. John
Clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 6
by James St. John
by James St. John
Baked sedimentary xenoliths in clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 3
by James St. John
by James St. John
Clinker-bed breccia (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 1
by James St. John
by James St. John
Clinker-bed breccia (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 2
by James St. John
by James St. John
Clinker-bed breccia (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 3
by James St. John
by James St. John
Clinker-bed breccia (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 4
by James St. John
by James St. John
Clinker-bed breccia (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 5
by James St. John
by James St. John
Clinker-bed breccia (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 6
by James St. John
by James St. John
Clinker-bed breccia (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 7
by James St. John
by James St. John
Clinker-bed breccia (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 8
by James St. John
by James St. John
Clinker-bed breccia (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; large block at Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 9
by James St. John
by James St. John
Clinker outcrop (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 1
by James St. John
by James St. John
Clinker outcrop (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 2
by James St. John
by James St. John
Clinker outcrop (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 3
by James St. John
by James St. John
Clinker outcrop (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 4
by James St. John
by James St. John
Clinker outcrop (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 5
by James St. John
by James St. John
Clinker outcrop (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; Interstate 90 west-bound hilltop rest area, east of Buffalo, Powder River Basin, Wyoming, USA) 6
by James St. John
by James St. John
Clinker horizon (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; hills east of Buffalo, Powder River Basin, Wyoming, USA)
by James St. John
by James St. John
Porcellanite clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; roadcut along west-bound Interstate 90's exit to Rt. 16, eastern side of Buffalo, Powder River Basin, northern Wyoming, USA) 3
by James St. John
by James St. John
Buchite-porcellanite clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; roadcut along west-bound Interstate 90's exit to Rt. 16, eastern side of Buffalo, Powder River Basin, northern Wyoming, USA) 3
by James St. John
by James St. John
Porcellanite-buchite clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; roadcut along west-bound Interstate 90's exit to Rt. 16, eastern side of Buffalo, Powder River Basin, northern Wyoming, USA) 2
by James St. John
by James St. John
Porcellanite clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; roadcut along west-bound Interstate 90's exit to Rt. 16, eastern side of Buffalo, Powder River Basin, northern Wyoming, USA) 2
by James St. John
by James St. John
Hyalite opal on porcellanite-buchite clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; roadcut along west-bound Interstate 90's exit to Rt. 16, eastern side of Buffalo, Powder River Basin, northern Wyoming)
by James St. John
by James St. John
Buchite-porcellanite clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; roadcut along west-bound Interstate 90's exit to Rt. 16, eastern side of Buffalo, Powder River Basin, northern Wyoming, USA) 2
by James St. John
by James St. John
Buchite-porcellanite clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; roadcut along west-bound Interstate 90's exit to Rt. 16, eastern side of Buffalo, Powder River Basin, northern Wyoming, USA) 1
by James St. John
by James St. John
Porcellanite-buchite clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; roadcut along west-bound Interstate 90's exit to Rt. 16, eastern side of Buffalo, Powder River Basin, northern Wyoming, USA) 1
by James St. John
by James St. John
Porcellanite clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; roadcut along west-bound Interstate 90's exit to Rt. 16, eastern side of Buffalo, Powder River Basin, northern Wyoming, USA) 1
by James St. John
by James St. John
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