|
|
Definition of acidic
1. Said of an igneous rock with a silica content above 63 weight-%
(IUGS recommendation for the classification of igneous rocks)
2. A descriptive term applied to those igneous rocks that contain more than 60% silica. Acidic is one of four subdivisions of a widely used system for classifying igneous rocks based on their silica content: acidic, intermediate, basic, and ultrabasic.
Ref: AGI
3. Applied loosely to any igneous rock composed predominantly of light-colored minerals having a relatively low specific gravity.
Compare with: felsic
(IUGS recommendation for the classification of igneous rocks)
2. A descriptive term applied to those igneous rocks that contain more than 60% silica. Acidic is one of four subdivisions of a widely used system for classifying igneous rocks based on their silica content: acidic, intermediate, basic, and ultrabasic.
Ref: AGI
3. Applied loosely to any igneous rock composed predominantly of light-colored minerals having a relatively low specific gravity.
Compare with: felsic
Mindat Lightbox
Mineral and Locality SearchOptions| Fade toolbar when not in focus | Fix toolbar to bottom of page | ||
|---|---|---|---|
| Hide Social Media Links | |||
| Slideshow frame delay | seconds | ||
Locality Updated: Larson Exploration Prospect, Menominee Range, Florence Co., Wisconsin, USAFrom Bill Cordua, 19th Jun 2013 03:45:17