Title: Exploring desert stone
Subjects: United States, History, Paleontology, Canyons, Scientific expeditions, Travel, United States. Army. Corps of Topographical Engineers, Sources, Geological surveys, Geography, Discovery and exploration, United states, army, corps of engineers, Geological survey (u.s.), Colorado river and valley, America, discovery and exploration, Paleontology, united states
Places: Four Corners Region, Colorado River (Colo.-Mexico)
People: J. N. Macomb (1810 or 11-1889)
Time periods: 19th century