lignitic group

2 definitions found

lignitic group - Collaborative International Dictionary of English v.0.48 :

  Laramie group \Lar"a*mie group`\n. (Geol.)
     An extensive series of strata, principally developed in the
     Rocky Mountain region, as in the Laramie Mountains, and
     formerly supposed to be of the Tertiary age, but now
     generally regarded as Cretaceous, or of intermediate and
     transitional character. It contains beds of lignite, often
     valuable for coal, and is hence also called the lignitic group
     . See Chart of Geology.
     [1913 Webster]

  Lignitic \Lig*nit"ic\ (l[i^]g*n[i^]t"[i^]k), a.
     Containing lignite; resembling, or of the nature of, lignite;
     as, lignitic clay.
     [1913 Webster]
  
     Lignitic group. See Laramie Group.
        [1913 Webster]