[1] : The Collaborative International Dictionary of English v.0.48

asphalt \as"phalt\, asphaltum \asphal"tum\, n. gr. ?, of
   eastern origin: cf. f. asphalte.
   1. mineral pitch, jews' pitch, or compact native bitumen. it
      is brittle, of a black or brown color and high luster on a
      surface of fracture; it melts and burns when heated,
      leaving no residue. it occurs on the surface and shores of
      the dead sea, which is therefore called asphaltites, or
      the asphaltic lake. it is found also in many parts of
      asia, europe, and america. see bitumen.
      1913 webster

   2. a composition of bitumen, pitch, lime, and gravel, used
      for forming pavements, and as a water-proof cement for
      bridges, roofs, etc.; asphaltic cement. artificial asphalt
      is prepared from coal tar, lime, sand, etc.
      1913 webster

   asphalt stone, asphalt rock, a limestone found
      impregnated with asphalt.
      1913 webster
see also:
bitumen asphalt stone asphalt rock 

Asphalt >> A Words
Asphalt, definition of term: Asphalt
asphalt_pag1.html

Paint Rock >> P Words
Paint Rock, definition of term: Paint Rock
paint+rock_pag1.html

Igneous Rock >> I Words
Igneous Rock, definition of term: Igneous Rock
igneous+rock_pag1.html