'Lignitic group' definitions:
Definition of 'Lignitic group'
From: GCIDE
- 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]
Definition of 'lignitic group'
From: GCIDE
- 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]