bituminous limestone

from The Collaborative International Dictionary of English v.0.48
Bituminous \Bi*tu"mi*nous\, a. [L. bituminosus: cf. F.
   bitumineux.]
   Having the qualities of bitumen; compounded with bitumen;
   containing bitumen.
   [1913 Webster]

         Near that bituminous lake where Sodom flamed. --Milton.
   [1913 Webster]

   {Bituminous coal}, a kind of coal which yields, when heated,
      a considerable amount of volatile bituminous matter. It
      burns with a yellow smoky flame.

   {Bituminous limestone}, a mineral of a brown or black color,
      emitting an unpleasant smell when rubbed. That of Dalmatia
      is so charged with bitumen that it may be cut like soap.
      

   {Bituminous shale}, an argillaceous shale impregnated with
      bitumen, often accompanying coal.
      [1913 Webster]
    

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