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Map of the Netherlands, 16th century
Map of the Netherlands, 16th century
A section of Polderland, Holland
A section of Polderland, Holland
Dune erosion from gales , North of Bergen aan Zee
Dune erosion from gales , North of Bergen aan Zee
Outcrop of "Athabasca tar sand" - pit of Abasand quarry
Outcrop of "Athabasca tar sand" - pit of Abasand quarry
Air photograph of McMurray, Alberta
Air photograph of McMurray, Alberta
Swash marks on Peter Pond Lake
Swash marks on Peter Pond Lake
Mission Canyon, Little Rocky Mountains, Montana
Mission Canyon, Little Rocky Mountains, Montana
Ironstone concretions in Eagle sandstone
Ironstone concretions in Eagle sandstone
Kepperlites sp. Rierdon formation. Morrison Dome.
Kepperlites sp. Rierdon formation. Morrison Dome.
Badlands. Fort Union formation. Paleocene
Badlands. Fort Union formation. Paleocene
Badlands. Fort Union formation. Paleocene
Badlands. Fort Union formation. Paleocene
Little Missouri River in Badlands, Theodore Roosevelt Park
Little Missouri River in Badlands, Theodore Roosevelt Park
Dam in Frenchman Valley near Eastend, Sask.
Dam in Frenchman Valley near Eastend, Sask.
Frenchman Valley near Knollys, Sask.
Frenchman Valley near Knollys, Sask.
Frenchman Valley seen from south rim of Knollys, Saskatchewan
Frenchman Valley seen from south rim of Knollys, Saskatchewan
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