Keywords: stereoscopic stereophotography stereophotographs historical usgs history geology mapping black and white blackandwhite bnw stereograph blackandwhite monochrome outdoor black and white Picturesque views of Rocky Mountain scenery. Box Elder Canyon affords a good section through the main ridge, being a much more regular gorge than the canyon of the La Prele. It is from 600 to 800 feet in depth, entirely of erosion, and so narrow that it is difficult to pass through it on foot, the side walls being perpendicular and sometimes overhanging. The predominating rocks are calcareous sandstones and some layers of quite fine limestones, with a great variety of texture. Converse County, Wyoming. 1870. (Stereoscopic view similar to Jackson, W.H. 271) Picturesque views of Rocky Mountain scenery. Box Elder Canyon affords a good section through the main ridge, being a much more regular gorge than the canyon of the La Prele. It is from 600 to 800 feet in depth, entirely of erosion, and so narrow that it is difficult to pass through it on foot, the side walls being perpendicular and sometimes overhanging. The predominating rocks are calcareous sandstones and some layers of quite fine limestones, with a great variety of texture. Converse County, Wyoming. 1870. (Stereoscopic view similar to Jackson, W.H. 271) |