Photograph by Stuart M. Young of a view of Tsegy Canyon near Marsh Pass, Arizona, in 1909 Photo no. 367 from Herbert E. Gregory Book 4: Navajo, San Juan, 191
Photograph of a monocline of La Plata (or Wingate) sandstone over Dolores (Chinle) formation on the ...
Photograph of beds of sandstone dipping southeast under Black Mesa, as seen from Marsh Pass, Arizona...
Photograph of Marsh Pass, Arizona, looking west, in 1914. Photo 903 from Herbert E. Gregory Book 7:...
Photograph by C.R. Jefferis of Tsegi Canyon displaying La Plata sandstone, on the Navajo Reservation...
Photograph by K. C. Heald of La Plata sandstone exposed at Marsh Pass, Arizona, in 1913. View is no...
Photograph showing cliffs with La Plata sandstone at the mouth of Tsegi Canyon on the Navajo Reserva...
Photograph showing cliffs with La Plata sandstone at the mouth of Tsegi Canyon on the Navajo Reserva...
Photograph of the monocline on southeast side of Skeleton Mesa, 2 miles east of the mouth of Tsegy C...
Photograph of the monocline on southeast side of Skeleton Mesa, 2 miles east of the mouth of Tsegy C...
Photograph shows a butte near Tsegi Canyon on the Navajo Reservation, Navajo County, Arizona, in 191...
Photograph by Stephen Janus of a view of Navajo Canyon, Arizona, toward Navajo Mountain in 1909. La ...
Photograph of Tsegi Canyon, showing recent stream erosion, in 1910. Photo no. 359 from Herbert E. G...
Photograph of a branch of Navajo Canyon, Arizona, in 1910. Photo no. 403 from Herbert E. Gregory Boo...
Photograph from Herbert E. Gregory Book 3: Navajo-Hopi, Arizona-New Mexico, 1909, showing Herbert E....
Photograph of the Herbert Gregory party on a trail in Tsegi Canyon north of Marsh Pass, Arizona, in ...
Photograph of a monocline of La Plata (or Wingate) sandstone over Dolores (Chinle) formation on the ...
Photograph of beds of sandstone dipping southeast under Black Mesa, as seen from Marsh Pass, Arizona...
Photograph of Marsh Pass, Arizona, looking west, in 1914. Photo 903 from Herbert E. Gregory Book 7:...
Photograph by C.R. Jefferis of Tsegi Canyon displaying La Plata sandstone, on the Navajo Reservation...
Photograph by K. C. Heald of La Plata sandstone exposed at Marsh Pass, Arizona, in 1913. View is no...
Photograph showing cliffs with La Plata sandstone at the mouth of Tsegi Canyon on the Navajo Reserva...
Photograph showing cliffs with La Plata sandstone at the mouth of Tsegi Canyon on the Navajo Reserva...
Photograph of the monocline on southeast side of Skeleton Mesa, 2 miles east of the mouth of Tsegy C...
Photograph of the monocline on southeast side of Skeleton Mesa, 2 miles east of the mouth of Tsegy C...
Photograph shows a butte near Tsegi Canyon on the Navajo Reservation, Navajo County, Arizona, in 191...
Photograph by Stephen Janus of a view of Navajo Canyon, Arizona, toward Navajo Mountain in 1909. La ...
Photograph of Tsegi Canyon, showing recent stream erosion, in 1910. Photo no. 359 from Herbert E. G...
Photograph of a branch of Navajo Canyon, Arizona, in 1910. Photo no. 403 from Herbert E. Gregory Boo...
Photograph from Herbert E. Gregory Book 3: Navajo-Hopi, Arizona-New Mexico, 1909, showing Herbert E....
Photograph of the Herbert Gregory party on a trail in Tsegi Canyon north of Marsh Pass, Arizona, in ...
Photograph of a monocline of La Plata (or Wingate) sandstone over Dolores (Chinle) formation on the ...
Photograph of beds of sandstone dipping southeast under Black Mesa, as seen from Marsh Pass, Arizona...
Photograph of Marsh Pass, Arizona, looking west, in 1914. Photo 903 from Herbert E. Gregory Book 7:...