Photograph by K. C. Heald, of a cliff in Blue Canyon, Coconino Co., Arizona, 1913. Rock shows an unconformity between McElmo and Dakota strata.. Photo 825 from Herbert E. Gregory Book 7: Navajo, 1913, 1914
Photograph of rock with McElmo-Dakota contact in Moenkopi Valley about 6 miles northeast of the Blue...
Photograph of cliffs a mile below a bridge over the Little Colorado River, displaying an unconformit...
Photograph of exposed strata in Nazlini Canyon, Arizona, displaying an unconformity with Shinarump o...
Photograph by K. C. Heald, of a cliff in Blue Canyon, Coconino Co., Arizona, 1913. Rock shows an un...
Photograph of rock showing unconformity between McElmo sandstone over Dakota sandstone in Steamboat ...
Photograph of cliffs showing an unconformity between McElmo and Dakota formations near Jetty-to Spri...
Photograph of cliffs in Tse-bito [now Beshbito] Wash, displaying an unconformity between Dakota and ...
Photograph of rock showing unconformity between McElmo sandstone over Dakota sandstone in Steamboat ...
Photograph of exposed rock 2 miles west of Manuelito, New Mexico, displaying an unconformity at the ...
Photograph of a cliff in the Moenkopi Valley of Arizona in 1914, displaying an unconformity between ...
Photograph of a rock outcrop of McElmo sandstone in Blue Canyon, Navajo Co., Arizona, in 1914. Phot...
Negative for photograph of exposed rock 2 miles west of Manuelito, New Mexico, displaying an unconfo...
Photograph of Blue Canyon, Navajo Co., Arizona, with McElmo sandstone in 1914. Photo 913 from Herbe...
Photograph of a rock outcrop displaying an unconformity between Chinle and Wingate layers, in the Mo...
Photograph by K. C. Heald of exposed McElmo rock with a conglomerate cape at the edge of Blue Canyon...
Photograph of rock with McElmo-Dakota contact in Moenkopi Valley about 6 miles northeast of the Blue...
Photograph of cliffs a mile below a bridge over the Little Colorado River, displaying an unconformit...
Photograph of exposed strata in Nazlini Canyon, Arizona, displaying an unconformity with Shinarump o...
Photograph by K. C. Heald, of a cliff in Blue Canyon, Coconino Co., Arizona, 1913. Rock shows an un...
Photograph of rock showing unconformity between McElmo sandstone over Dakota sandstone in Steamboat ...
Photograph of cliffs showing an unconformity between McElmo and Dakota formations near Jetty-to Spri...
Photograph of cliffs in Tse-bito [now Beshbito] Wash, displaying an unconformity between Dakota and ...
Photograph of rock showing unconformity between McElmo sandstone over Dakota sandstone in Steamboat ...
Photograph of exposed rock 2 miles west of Manuelito, New Mexico, displaying an unconformity at the ...
Photograph of a cliff in the Moenkopi Valley of Arizona in 1914, displaying an unconformity between ...
Photograph of a rock outcrop of McElmo sandstone in Blue Canyon, Navajo Co., Arizona, in 1914. Phot...
Negative for photograph of exposed rock 2 miles west of Manuelito, New Mexico, displaying an unconfo...
Photograph of Blue Canyon, Navajo Co., Arizona, with McElmo sandstone in 1914. Photo 913 from Herbe...
Photograph of a rock outcrop displaying an unconformity between Chinle and Wingate layers, in the Mo...
Photograph by K. C. Heald of exposed McElmo rock with a conglomerate cape at the edge of Blue Canyon...
Photograph of rock with McElmo-Dakota contact in Moenkopi Valley about 6 miles northeast of the Blue...
Photograph of cliffs a mile below a bridge over the Little Colorado River, displaying an unconformit...
Photograph of exposed strata in Nazlini Canyon, Arizona, displaying an unconformity with Shinarump o...