. Contributions to the geography of the United States, 1923-1924. Geology; Mines and mineral resources. A. ENTRANCE TO CARLSBAD CAVERN. The limestone of the cavern roof here fell to the floor, a vertical distance of 246 feet. Photograph by W. T. B. TRAVERTINE IN LAST CHANCE CANYON, NEAR QUEEN, N. MEX. The bed of limestone at the right was thickly covered vt-ith calcium-carbonate deposited from spring water. The water no longer flows over the travertine, and the part showing aLove the century plant has begun to break down. Photograph by W. T. Please note that these images are extrac
. Contributions to the geography of the United States, 1923-1924. Geology; Mines and mineral resources. A. ENTRANCE TO CARLSBAD CAVERN. The limestone of the cavern roof here fell to the floor, a vertical distance of 246 feet. Photograph by W. T. B. TRAVERTINE IN LAST CHANCE CANYON, NEAR QUEEN, N. MEX. The bed of limestone at the right was thickly covered vt-ith calcium-carbonate deposited from spring water. The water no longer flows over the travertine, and the part showing aLove the century plant has begun to break down. Photograph by W. T. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Campbell, Marius R. (Marius Robinson), 1858-1940; Geological Survey (U. S. ). Washington [D. C. ] : U. S. Govt. Print. Off.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectgeology, booksubjectm
