Igneous rocks with more than 45 % and less than 52 % of silica. Basic rocks, sometimes referred to as mafic, are generally dark in color with a density greater than 3. Common examples include basalt and gabbro.
Synonyms and Related Terms
básica (Port.); mafic
Sources Checked for Data in Record
- Submitted information Comment: José Delgado Rodrigues, LNEC, 2009.