Photograph of a butte of Permian rock near Holbrook, Arizona, in 1913. Photo 716 from Herbert E. Gregory Book 6: Navajo, 1913
Photograph of a canyon near Tudecoz Spring with its Upper Permian sandstone walls, about six miles s...
Photograph of domes of Navajo Sandstone in the desert near Tuba City, Arizona, in 1914. Photo 935 f...
Photograph of a rock formation on the Navajo Reservation, northeastern Arizona, in 1909. From Herbe...
Photograph of exposed Upper Permian rock in the desert near Holbrook, Arizona, in 1913. Photo 712 f...
Photograph of a desert landscape at the mouth of Canyon Diablo near Leupp, Arizona, in 1913. Permia...
Photograph of gypsum exposed in a Permian layer of strata near Holbrook, Navajo Co., Arizona, in 191...
Photograph of gypsum exposed in a Permian layer of strata about two miles east of Holbrook, Navajo C...
Photograph of wind-carved Permian rock two miles above Tolchaco, Arizona, in 1913. Photo 729 from H...
Photograph of Permian shale outcrop above a dry wash, Coconino Co., Arizona, 1913. Photo 741 from H...
Photograph of exposed Permian, Shinarump, and Dolores rock near Tucker Spring near Winslow, Arizona,...
Photograph of Upper Permian rock exposed in Bonito Creek Canyon [now Blue Canyon] near Fort Defian...
Photograph by E.C. Case of gypsum seams in a Permian (Moenkopi) layer of strata near Holbrook, Navaj...
Photograph of Upper Permian rock exposed in Bonito Creek Canyon [now Blue Canyon] near Fort Defian...
Photograph of a rock outcrop of McElmo sandstone in Blue Canyon, Navajo Co., Arizona, in 1914. Phot...
Photograph of a canyon near Tudecoz Spring with its Upper Permian sandstone walls, about six miles s...
Photograph of domes of Navajo Sandstone in the desert near Tuba City, Arizona, in 1914. Photo 935 f...
Photograph of a rock formation on the Navajo Reservation, northeastern Arizona, in 1909. From Herbe...
Photograph of exposed Upper Permian rock in the desert near Holbrook, Arizona, in 1913. Photo 712 f...
Photograph of a desert landscape at the mouth of Canyon Diablo near Leupp, Arizona, in 1913. Permia...
Photograph of gypsum exposed in a Permian layer of strata near Holbrook, Navajo Co., Arizona, in 191...
Photograph of gypsum exposed in a Permian layer of strata about two miles east of Holbrook, Navajo C...
Photograph of wind-carved Permian rock two miles above Tolchaco, Arizona, in 1913. Photo 729 from H...
Photograph of Permian shale outcrop above a dry wash, Coconino Co., Arizona, 1913. Photo 741 from H...
Photograph of exposed Permian, Shinarump, and Dolores rock near Tucker Spring near Winslow, Arizona,...
Photograph of Upper Permian rock exposed in Bonito Creek Canyon [now Blue Canyon] near Fort Defian...
Photograph by E.C. Case of gypsum seams in a Permian (Moenkopi) layer of strata near Holbrook, Navaj...
Photograph of Upper Permian rock exposed in Bonito Creek Canyon [now Blue Canyon] near Fort Defian...
Photograph of a rock outcrop of McElmo sandstone in Blue Canyon, Navajo Co., Arizona, in 1914. Phot...
Photograph of a canyon near Tudecoz Spring with its Upper Permian sandstone walls, about six miles s...
Photograph of domes of Navajo Sandstone in the desert near Tuba City, Arizona, in 1914. Photo 935 f...
Photograph of a rock formation on the Navajo Reservation, northeastern Arizona, in 1909. From Herbe...