massive

a.
  1. Forming, or consisting of, a large mass; compacted; weighty; heavy; massy.
  2. (Min.) In mass; not necessarily without a crystalline structure, but having no regular form; as, a mineral occurs massive.
    3. Massive rock (Geol.),
    a compact crystalline rock not distinctly schistose, as granite; also, with some authors, an eruptive rock.