. The Crystal Falls iron-bearing district of Michigan. Iron ores; Geology; Geology, Stratigraphic; Geology, Stratigraphic. U, S. GEOLOGICAL SURVEY MONOGRAPH XXXVI PL. XXV. (A) AMYCDALOIDAL BASALT. (B) AMYCDALOIDAL BASALT. THE MERIOEN GHAVURE 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