. The Crystal Falls iron-bearing district of Michigan. Iron ores; Geology; Geology, Stratigraphic; Geology, Stratigraphic. U. S. GEOLOGICAL SURVEY MONOGRAPH XXXVI PL. XL. -0^-^^. '^ â k: J" w,'"' â¢y V^/'^ â¢^^r^; --*v- 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 Clements, Julius Morgan, 1869-; Smyth, Henry Lloyd, 1862-; Bayley, William Shirley, 1861-1943. Washington, : Govt. Print. Off.

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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectgeology