Argillic assemblages include kaolinite replacing plagioclase and montmorillonite replacing amphibole and plagioclase. Chloritization is the alteration of pyroxene or amphibole minerals into the chlorite group minerals. The andesite rock contains some visible crystals of pyroxene or amphibole. Fine grained sedimentary rocks were transformed into hornfels and minerals such as amphibole, pyroxene. Garnet developed in calcareous rocks as well as amphibole and pyroxene. Rock types include trachyandesite, trachyte, syenite and amphibole - biotite granite. Amosite, crocidolite, tremolite, anthophyllite and actinolite are members of the amphibole class. Pseudomorphs of amphibole after pyroxene are known as uralite. Other common minerals include quartz, orthoclase, talc, carbonate minerals and amphibole (actinolite). The reaction rim constituted by amphibole and/or biotite is commonly observed. Hydrous minerals such as amphibole, zeolites, chlorite etc. Pico do Fogo consists of basanite, tephrite, phonotephrite, clinopyroxene, amphibole, magnetite, olivine, melilite and leucite. Pargasite is a rare magnesium-rich amphibole with essential sodium, usually found in ultramafic rocks. Four of the amphibole minerals are among the minerals commonly called asbestos. The oceanic crust contains hydrated minerals such as the amphibole group.