. Contributions to the geography of the United States, 1923-1924. Geology; Mines and mineral resources. U. S. GEOLOGICAL SURVEY BTTLLETIN 700 PLATE XII. A. CRUMPLED LAMINATED CLAY, POSSIBLY 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