. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. 856 MINES. Fig. 734 represents one of the Mansfeldt copper schist mines in the district called Burgoerner, or Preusshoheil, 1. Vegetable mould, with silicious gravel. 2. Ferruginous clay or loam. 3. Sand, with fragments of quartz. 4. Red clay, a bed of variable thickness as well as the lower strata, according as thecupreous schist is nearer or farther from the surface. 5. Ooolite (roogenstein), 6. Newer variegated sandstone (hunter sandstein). 7. Newer gypsum; below which, there is
. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. 856 MINES. Fig. 734 represents one of the Mansfeldt copper schist mines in the district called Burgoerner, or Preusshoheil, 1. Vegetable mould, with silicious gravel. 2. Ferruginous clay or loam. 3. Sand, with fragments of quartz. 4. Red clay, a bed of variable thickness as well as the lower strata, according as thecupreous schist is nearer or farther from the surface. 5. Ooolite (roogenstein), 6. Newer variegated sandstone (hunter sandstein). 7. Newer gypsum; below which, there is 8. A bluish marly clay. 9. Slinkstone, or lucuUite. 10. Friable grayish marl. 11. Older gypsum, a rock totally wanting in the other districts of the mines of Rothen-berg ; but abounding in Saxon Mansfeldt, where it includes vast caverns known amongthe miners by the name of schlotten, as indicated in the figure. 12. The calcareous rock called zechstein. The lower part of this stratum showssymptoms of the cupriferous schist that lies underneath. It presents three thin bands,differently modified, which the min
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Keywords: ., bookcentury1800, bookdecade1840, booksubje, booksubjecttechnology
