United States or Mauritius ? Vote for the TOP Country of the Week !
The thickest of known Russian coals occur at Lithwinsk, where three seams are worked, each measuring 30 feet to 40 feet thick. An extension of the Upper Silesian coal-field appears in Russian Poland. This is of upper Carboniferous age, and contains an aggregate of 60 feet of coal. Of its 370 seams there are no less than 117 workable ones, and these contain 350 feet of coal.
Word Of The Day