potassic
31Migmatite — Ptygmatic folding in migmatite Migmatite on the coast of Saa …
32Skarn — is a metamorphic rock that is usually variably colored green or red, occasionally grey, black, brown or white. It usually forms by chemical metasomatism of rocks during metamorphism and in the contact zone of magmatic intrusions like granites… …
33Avala — Infobox Mountain Name = Avala Photo = Planina Avala.jpg Caption = Sunrise above the Avala Elevation = 511 metres (1,677 ft) Location = Serbia Range = Prominence = Coordinates = coord|44|41|25|N|20|30|51|E|display=title|type:mountain source:dewiki …
34Ramanagara — This article is about the municipality in India. For its namesake district, see Ramanagara district. Ramanagara   city   …
35Lamprophyre — Lamprophyres (Greek λαµπρός (lamprós) = bright and φύρω (phýro) = to mix) are uncommon, small volume ultrapotassic igneous rocks primarily occurring as dikes, lopoliths, laccoliths, stocks and small intrusions. They are alkaline silica… …
36Essexite — (pronounced|ˈɛsəksaɪt), also called nepheline monzogabbro (IPA|/ˈnɛfəliːn ˌmɒnzoʊˈgæbroʊ/) is a dark gray or black holocrystalline plutonic igneous rock. Its name is derived from the type locality in Essex County, MA.Modern petrology identifies… …
37Aegirine — crystals in matrix General Category Silicate mineral, Pyroxene …
38Komatiite — Komatiites are ultramafic mantle derived volcanic rocks. They have low SiO2, low K2O, low Al2O3, and high to extremely high MgO. They were named for their type locality along the Komati River in South Africa. True komatiites are very rare and… …
39Greisen — is a highly altered granitic rock or pegmatite. Greisen is formed by autogenic alteration of a granite and is a class of endoskarn.Greisens appear as highly altered rocks, partly coarse, crystalline granite, partly vuggy with miarolitic cavities …
40Porphyry copper deposit — Porphyry copper deposits are copper orebodies which are associated with porphyritic intrusive rocks and the fluids that accompany them during the transition and cooling from magma to rock. Circulating surface water or underground fluids may… …
