anorthosite

anorthosite englanniksi

1. A phaneritic, intrusive igneous rock characterized by a predominance of plagioclase feldspar.

2. 1863, T. Sterry Hunt, "On the Chemical and Mineralogical Relations of Metamorphic Rocks", The American Journal of Science and Arts, Volume XXXVI, November, 1863, page 224:

The second, or Labrador series is characterized, as already remarked, by the predominance of great beds of anorthosite, composed chiefly of triclinic feldspars (..)