When it comes to chemistry, felsic minerals and rocks are at the opposite end of the elemental spectrum as mafic minerals and rocks are. Other intrusive rocks are discovered through deep‐drilling programs. Felsic rocks are mostly light-colored and the most common type is granite. 6.0 Deposits related to felsic to intermediate extrusive rocks Deposits related to felsic to intermediate extrusive rocks in Afghanistan are represented by epithermal deposits of mercury and possibly precious and base metals (section 6.1) and volcanogenic massive sulfide deposits (VMS deposits) that are associated with submarine volcanic flows (section 6.2). Search for an answer or ask Weegy. Felsic rocks are composed of minerals such as quartz, orthoclase, muscovite, and feldspars.


Intrusive rocks crystallize from magmas that have been intruded into the earth's crust at depths far below the surface. Extrusive. Archaeologists have studied many cherokee artifacts (tools, spearheads, arrowheads, etc.) Intermediate rocks are composed of the minerals amphibole and feldspar and contain a combination of light and dark minerals. Some extrusive rocks, such as obsidian and pumice, cool so rapidly that they completely lack crystal structure and are considered a volcanic glass. Rhyolite is a felsic rock that, like granite, is rich in silicate minerals. Mafic rock is commonly contrasted with felsic rock, in which Felsic magmas are much more viscous than the intermediate magmas. These minerals are high in magnesium and ferric oxides, and their presence gives mafic rock its characteristic dark colour. Andesite is an extrusive volcanic rock with a composition that is intermediate between basalt and rhyolite.Andesite magma is characterized by intermediate temperatures and viscosities resulting in both passive (lava) and violent (pyroclastic) eruptive styles.Rhyolite is an extrusive felsic (silicic) volcanic rock. Therefore, rocks are divided into ultramafic, mafic, intermediate, and felsic. Extrusive igneous rocks erupt onto the surface, where they cool quickly to form small crystals. This conversation has been flagged as incorrect. Extrusive rock refers to the mode of igneous volcanic rock formation in which hot magma from inside the Earth flows out (extrudes) onto the surface as lava or explodes violently into the atmosphere to fall back as pyroclastics or tuff. In contrast, intrusive rock refers to rocks formed by magma which cools below the surface. Felsic, intermediate and mafic igneous rocks differ in their mineral composition. By contrast, intrusive rocks are formed from magma that was forced into older rocks at depth within Earth’s crust; the molten material then slowly solidifies below Earth’s surface, where it may later be exposed through erosion. Extrusive rock, any rock derived from magma (molten silicate material) that was poured out or ejected at Earth’s surface.