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basalt

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basalt


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Basalt  \Ba*salt"\,  n.  [N.  basaltes  (an  African  word),  a  dark  and 
  hard  species  of  marble  found  in  Ethiopia:  cf  F.  basalte.] 
  1.  (Geol.)  A  rock  of  igneous  origin,  consisting  of  augite  and 
  triclinic  feldspar,  with  grains  of  magnetic  or  titanic 
  iron,  and  also  bottle-green  particles  of  olivine 
  frequently  disseminated. 
 
  Note:  It  is  usually  of  a  greenish  black  color,  or  of  some 
  dull  brown  shade,  or  black.  It  constitutes  immense  beds 
  in  some  regions,  and  also  occurs  in  veins  or  dikes 
  cutting  through  other  rocks.  It  has  often  a  prismatic 
  structure  as  at  the  Giant's  Causeway,  in  Ireland,  where 
  the  columns  are  as  regular  as  if  the  work  of  art.  It  is 
  a  very  tough  and  heavy  rock,  and  is  one  of  the  best 
  materials  for  macadamizing  roads. 
 
  2.  An  imitation,  in  pottery,  of  natural  basalt;  a  kind  of 
  black  porcelain. 
 
  From  WordNet  r  1.6  [wn]: 
 
  basalt 
  n  :  the  commonest  type  of  solidified  lava;  a  dense  dark  gray 
  fine-grained  igneous  rock  composed  chiefly  of 
  calcium-rich  plagioclase  feldspar  and  pyroxene 
 
  From  U.S.  Gazetteer  (1990)  [gazetteer]: 
 
  Basalt,  CO  (town,  FIPS  4935) 
  Location:  39.36673  N,  107.02697  W 
  Population  (1990):  1128  (507  housing  units) 
  Area:  1.7  sq  km  (land),  0.0  sq  km  (water) 
  Zip  code(s):  81621 
  Basalt,  ID  (city,  FIPS  5230) 
  Location:  43.31436  N,  112.16515  W 
  Population  (1990):  407  (128  housing  units) 
  Area:  0.7  sq  km  (land),  0.0  sq  km  (water) 




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