 The manganese-bearing deposit varies from 1 to 2 feet in thickness and dips almost vertically. The ore, however, composes only a small part of this and usually occurs as thin seams and pockets from a fraction of an inch to over 2 inches in thickness,...  Bulletin of the United States Geological Survey - Page 98by Geological Survey (U.S.) - 1918Full view - About this book
 | Geological Survey of Arkansas - Geology - 1891 - 718 pages
...part of the latter is free from such impurity. The manganse-bearing deposit varies from one to two feet in thickness and dips almost vertically. The...thin seams and pockets from a fraction of an inch toover two inches in thickness, scattered irregularly through the rock. Occasionally, however, the... | |
 | Arkansas. Geological Survey, 1887-1893 - Geology - 1891 - 730 pages
...part of the latter is free from such impurity. The manganse-bearing deposit varies from one to two feet in thickness and dips almost vertically. The...thin seams and pockets from a fraction of an inch toover two inches in thickness, scattered irregularly through the rock. Occasionally, however, the... | |
 | Arkansas. Geological Survey, 1887-1893 - Geology - 1891 - 720 pages
...large part of the latter is free from such impurity. The manganse-bearing deposit varies from one totwo feet in thickness and dips almost vertically. The...thin seams and pockets from a fraction of an inch toover two inches in thickness, scattered irregularly through the rock. Occasionally, however, the... | |
 | Good Roads Institute, Chapel Hill, N.C. - Roads - 1908 - 772 pages
...from the main vein in places, though no amethysts were observed in them. The amethyst crystals range from a fraction of an inch to over 2 inches In thickness. Most of them have only a pale amesthystine color and some are nearly colorless quartz. The purple color... | |
 | F. L. Ransome - Geology, Economic - 1918 - 760 pages
...Is free from such Impurity. The manganese-bearing deposit varies from 1 to 2 feet In thickness anil dips almost vertically. The ore, however, composes...disappears altogether or is represented only by a stain iu the rock, but widens out again at irregular intervals. Other openings made Ity the Arkansas 'Development... | |
 | United States. Bureau of Mines - Digital images - 1911 - 1048 pages
...from the main vein in places, though no amethysts were observed in them. The amethyst crystals range from a fraction of an inch to over 2 inches in thickness. Most of them have only a pale amethystine color and some are nearly colorless quartz. The purple color... | |
 | United States - 1911 - 952 pages
...soft in other places. The turquoise occurs in nodules and nodular seams or veinlets. The nodules range from a fraction of an inch to over 2 inches in thickness and the seams up to one-half inch in thickness. The seams of turquoise are not regular or continuous,... | |
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