Photograph of a view of a sandstone outcrop about 2 miles east of Black Rock, south of Fort Defiance, Arizona, in 1913. Photo 593 from Herbert E. Gregory Book 6: Navajo, 1913
Photograph of conglomerate rock at Black Rock, a diabase outcrop just south of Fort Defiance, Arizon...
Photograph of Upper Permian rock exposed in Bonito Creek Canyon [now Blue Canyon] near Fort Defian...
Photograph of rock outcrops near Fort Defiance, Arizona, displaying an unconformity between Permian ...
Photograph of a view of a sandstone outcrop about 2 miles east of Black Rock, south of Fort Defiance...
Photograph of a view of a sandstone outcrop about 2 miles east of Black Rock, south of Fort Defiance...
Photograph of a view of a sandstone outcrop about 2 miles east of Black Rock, south of Fort Defiance...
Photograph of a view of a sandstone outcrop about 2 miles east of Black Rock, south of Fort Defiance...
Photograph of a sandstone ridge east of Indian Road 12 between Fort Defiance and Window Rock, Arizon...
Photograph of Black Rock, a diabase outcrop just south of Fort Defiance, Arizona. From Herbert E. G...
Photograph of cliffs displaying banded La Plata strata above Black Creek north of Fort Defiance, Ari...
Photograph of a view of Black Creek Valley near Fort Defiance, Arizona. From Herbert E. Gregory Book...
Photograph of Black Rock, an outcrop of volcanic rock in the vicinity of Fort Defiance, Arizona, in ...
Photograph of conglomerate rock at Black Rock, a diabase outcrop just south of Fort Defiance, Arizon...
Photograph of the view south from Zilditloi Mountain toward Fort Defiance, Arizona, in 1913, Photo ...
Photograph by K. C. Heald of cliffs with cross-bedding in La Plata (Wingate) sandstone, near Tunnel ...
Photograph of conglomerate rock at Black Rock, a diabase outcrop just south of Fort Defiance, Arizon...
Photograph of Upper Permian rock exposed in Bonito Creek Canyon [now Blue Canyon] near Fort Defian...
Photograph of rock outcrops near Fort Defiance, Arizona, displaying an unconformity between Permian ...
Photograph of a view of a sandstone outcrop about 2 miles east of Black Rock, south of Fort Defiance...
Photograph of a view of a sandstone outcrop about 2 miles east of Black Rock, south of Fort Defiance...
Photograph of a view of a sandstone outcrop about 2 miles east of Black Rock, south of Fort Defiance...
Photograph of a view of a sandstone outcrop about 2 miles east of Black Rock, south of Fort Defiance...
Photograph of a sandstone ridge east of Indian Road 12 between Fort Defiance and Window Rock, Arizon...
Photograph of Black Rock, a diabase outcrop just south of Fort Defiance, Arizona. From Herbert E. G...
Photograph of cliffs displaying banded La Plata strata above Black Creek north of Fort Defiance, Ari...
Photograph of a view of Black Creek Valley near Fort Defiance, Arizona. From Herbert E. Gregory Book...
Photograph of Black Rock, an outcrop of volcanic rock in the vicinity of Fort Defiance, Arizona, in ...
Photograph of conglomerate rock at Black Rock, a diabase outcrop just south of Fort Defiance, Arizon...
Photograph of the view south from Zilditloi Mountain toward Fort Defiance, Arizona, in 1913, Photo ...
Photograph by K. C. Heald of cliffs with cross-bedding in La Plata (Wingate) sandstone, near Tunnel ...
Photograph of conglomerate rock at Black Rock, a diabase outcrop just south of Fort Defiance, Arizon...
Photograph of Upper Permian rock exposed in Bonito Creek Canyon [now Blue Canyon] near Fort Defian...
Photograph of rock outcrops near Fort Defiance, Arizona, displaying an unconformity between Permian ...