Parameter Tree:
EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > ELEMENTS > MAJOR ELEMENTS

Definition:
Elements that constitute > 1 wt. % of a rock as determined in a chemical
analysis.


Reference:
Philpotts, Anthony R.(1990) Principles of Igneous and Metamorphic
Petrology
, 498 pp., Prentice Hall, New Jersey, USA.