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Title | Collection Number And Name | Photo Number |
| 1 |
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Navajo (?) sandstone and overlying beds in canyon 12± miles east of Utah Colorado line, 1929 | P0013 Herbert E. Gregory Photograph Collection | P0013n10_009_2105 |
| 2 |
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Same as 821 [Navajo (?) sandstone and overlying beds in canyon 12± miles east of Utah Colorado line, 1929] | P0013 Herbert E. Gregory Photograph Collection | P0013n10_009_2106 |
| 3 |
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Dinosaur bone in McElmo strata, Yellow Jacket creek, 3± miles north of Holly's ranch, McElmo valley, Colorado. 1910 (Photo N-M77) | P0013 Herbert E. Gregory Photograph Collection | P0013n04_04_0518 |
| 4 |
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Erosion pillar, McElmo valley, 15± miles west of Cortez, Colorado. 1910 | P0013 Herbert E. Gregory Photograph Collection | P0013n04_01_0511 |
| 5 |
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McElmo strata, Holly's ranch, McElmo valley, Colorado, 33± miles west of Cortez, Colorado. 1910 (Photo G-125) | P0013 Herbert E. Gregory Photograph Collection | P0013n04_03_0515 |
| 6 |
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Mud cracks, McElmos valley, Colorado. 1910 (Photo G-122) | P0013 Herbert E. Gregory Photograph Collection | P0013n04_01_0512 |
| 7 |
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McElmo Canyon near its western extremity, showing McElmo formations on LaPlata sandstone | P0013 Herbert E. Gregory Photograph Collection | P0013n09_172_2046 |
| 8 |
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McElmo Canyon, Colo., showing lower part of Wingate sandstone, 1925 | P0013 Herbert E. Gregory Photograph Collection | P0013n09_171_2044 |
| 9 |
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Building raft on San Juan River, July 1909 | P0013 Herbert E. Gregory Photograph Collection | P0013n03_72_0496 |
| 10 |
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Building raft on San Juan River, July 1909 | P0013 Herbert E. Gregory Photograph Collection | P0013n03_72_0495 |
| 11 |
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Battle Rock, McElmo Creek, SW Colorado | P0013 Herbert E. Gregory Photograph Collection | P0013n08_056_1410 |
| 12 |
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Round tower, Mancas Creek, SW Colorado | P0013 Herbert E. Gregory Photograph Collection | P0013n08_053_1404 |
| 13 |
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San Juan River. Mud flats like quicksand near Four Corners | P0013 Herbert E. Gregory Photograph Collection | P0013n08_054_1405 |
| 14 |
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Sand Creek canyon, SW Colorado. Many square miles of almost desert country are filled with cave ruins | P0013 Herbert E. Gregory Photograph Collection | P0013n08_055_1408 |
| 15 |
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Dinosaur bone in McElmo Strata, Yellow Jacket creek, 3+ mi. north of Holly's ranche, McElmo Valley, Colo., 1910 (Photo N-M77) | P0013 Herbert E. Gregory Photograph Collection | P0013n04_04_0518 |
| 16 |
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Dinosaur bone in McElmo Strata, Yellow Jacket creek, 3+ mi. north of Holly's ranche, McElmo Valley, Colo., 1910 (Photo N-M77) | P0013 Herbert E. Gregory Photograph Collection | P0013n04_05_0519 |
| 17 |
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Erosion pillar, McElmo Valley, 15+ mi. west of Cortez | P0013 Herbert E. Gregory Photograph Collection | P0013n04_01_0511 |
| 18 |
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Holly's Ranche. 33+ mi. W. of Cortez, Colo., in McElmo valley, 1910 (Photo G128) | P0013 Herbert E. Gregory Photograph Collection | P0013n04_05_0520 |
| 19 |
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McElmo strata, Holly's ranche, McElmo valley, Colo., 33+ mi. west of Cortez, Colo., 1910 (Photo G-125) | P0013 Herbert E. Gregory Photograph Collection | P0013n04_03_0515 |
| 20 |
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McElmo strata, Holly's ranche, McElmo valley, Colo., 33+ mi. west of Cortez, Colo., 1910 (Photo G-126) | P0013 Herbert E. Gregory Photograph Collection | P0013n04_03_0516 |
| 21 |
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McElmo strata, Holly's ranche, McElmo valley, Colo., 33+ mi. west of Cortez, Colo., 1910 (Photo N-M76) | P0013 Herbert E. Gregory Photograph Collection | P0013n04_04_0517 |
| 22 |
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Mud cracks, McElmo Valley (Photo G-123) | P0013 Herbert E. Gregory Photograph Collection | P0013n04_02_0513 |
| 23 |
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Mud cracks, McElmo Valley (Photo G-124) | P0013 Herbert E. Gregory Photograph Collection | P0013n04_02_0514 |
| 24 |
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Mud cracks, McElmo Valley, Colorado (Photo G-122) | P0013 Herbert E. Gregory Photograph Collection | P0013n04_01_0512 |
| 25 |
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Canyon City, Colo, hogback, 1900 | P0013 Herbert E. Gregory Photograph Collection | P0013n01_02_001 |
