EntityQ9337799· pop 9· linked from 73 articlesacidic rockSign in to savetype of igneous rock; rock that is either siliceous, having a high content of silica (SiO2), or rock with a low pHConnectionsmaficityEntityfelsicityEntityacidEntitybaseEntitygraniteEntitypHEntityquartzEntityigneous rockEntitysilicon dioxideEntitypetrologyEntityrhyoliteEntityacid rockEntityultramafic rockEntitymass fractionEntityCategoriesPetrology