basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predominantly of sodium-rich plagioclase plus pyroxene or hornblende.retrieved2023-12-29tagsandesiteAphanite (Wikipedia)Igneous rock (Wikipedia)Wikipediawebsitehttps://en.wikipedia.org/wiki/Andesite