Definitions

from The Century Dictionary and Cyclopedia

  • In petrography, in the quantitative classification of igneous rocks (see rock), extremely alkalic: said of salic minerals, or of magmas in which they preponderate, when the ratio of the salic K2O and Na2O to salic CaO is greater than 7:1. It is applied to femic minerals, or to magmas in which they preponderate, when the ratio of the femic K2O and Na2O to femic CaO, MgO, and FeO is greater than 7:1.

Etymologies

Sorry, no etymologies found.

Examples

Sorry, no example sentences found.

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.