Composition:
* Felsic: This refers to igneous rocks with a high silica content, like granite and rhyolite. They are the opposite of basaltic rocks in terms of their mineral composition.
Texture:
* Phaneritic: This refers to rocks with large, visible crystals, like granite. Basaltic rocks are typically fine-grained (aphanitic) with small crystals.
Origin:
* Continental: Basaltic rocks are typically associated with oceanic environments. While continental rocks can be basaltic, most continental igneous rocks are felsic.
Other:
* Acidic: This is a term sometimes used to describe felsic rocks, while basaltic rocks are considered mafic (meaning they have a higher content of magnesium and iron).
So, the best way to determine the opposite of "basaltic" is to consider the context in which you are using it.