Sentence Examples


  • There are two green varieties, called in the trade "sea-green" and "unfading green," the former being used for a cheap roofing slate; and there are purplish varieties.
  • Slate is obtained in large quantities from the departments of Maine-ct-Loire (Angers), Ardennes (Fumay) and Mayenne (Renaz).
  • The dark bituminous layers of clay slate, which occur intercalated among the quartzites, have led, here as elsewhere, to the hope of coming upon a seam of coal, but it is contrary to experience that coal of any value should be found in rocks of that age.
  • Many of the block mountains of the Great Basin are of complicated internal structure, showing rocks of all ages - slate, limestone, quartzites, granite, multi-coloured volcanic rocks, and large areas of lava overflow.
  • Iron, coal and slate are the chief products, and copper and cobalt may be added.
 

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