20% 50% 70% 100%. While the former is created in high-temperature lava that leads to extremely low viscosity, the latter has a high viscosity. Mafic rocks usually found in abundance include dolerite, gabbro, and basalt. Most felsic lavas have high viscosity. We hope you are enjoying ScienceStruck! Felsic is the term used for the rocks rich in the mental feldspar, that contains aluminium and silica at high levels. d. mafic magma mixes with felsic material. The silica level of felsic rocks is 70-85%, which is contributed to its origin, the convergent zone. But Felsic is rich in silica and aluminium. This gives these rocks their characteristic dark green or greenish-black colour. 5.Either in describing rocks or lava, mafic means that the lava or rock has less silica while felsic implies that the lava or rock has the most silica. The low density and light-weight, ascribable to the presence of light-weight minerals such as oxygen, sodium and potassium. The bases of … The temperatures are around 650°C to 750°C. This is the site where we share everything we've learned. Graphite is a well-known example of felsic rocks. As iron-rich silicates are normally dark in color, mafic rocks are dark-colored. Igneous rocks consist of primarily 12 types of oxides. Composition of Igneous Rock. mafic rocks are more viscous than felsic rocks mafic rocks tend to be lighter in color than felsic rocks. This is since their origin is mostly the sea bed, that is not abundant in silica. Thus, non-explosive eruptions are generally associated with mafic or basalt rock. Most mafic minerals are dark in color, and common rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite. Their characteristics are medium to coarse-grained. Felsic rocks are light in color. Basalt is a well-known example of a mafic rock. Is Basalt felsic? It is of, relating to, or denoting a group of light-colored minerals, including feldspar, feldspathoids, quartz, and muscovite. Ever since then, we've been tearing up the trails and immersing ourselves in this wonderful hobby of writing about the differences and comparisons. The low density of these rocks is due to the low content of silica present in them. Mafic magmas are usually produced at spreading centers, and represent material which is newly differentiated from the upper mantle. The most common felsic rock is granite, which represents the purified end product of the earth’s internal differentiation process. In simple terms, gabbro is just the cooled magma chamber … Mafic rocks are obtained from mostly the sea bed volcanoes whereas felsic rocks are obtained from the cooling of lavas from the convergent zones. Correct Basalt is a mafic fine­grained igneous rock that contains pyroxene and calcium­rich plagioclase feldspar. In conclusion, you have seen the most significant points in mafic vs felsic. It is of, relating to, or denoting a group of light-colored minerals, including feldspar, feldspathoids, quartz, and muscovite. Nevertheless, there are exceptions to this rule; when degassed felsic lava erupts at the surface, it is non-explosive, and some hydro-volcanic eruptions with mafic magma are explosive. Would you like to write for us? Mafic rocks are generally found in dark shades of green or greenish-black in colour. Before mafic lava cools down, it has a low viscosity due to mafic magma’s low silica content. Felsic magma, on cooling, forms feldspar and quartz. Whereas, felsic rocks have high viscosity. It is commonly erupted as passive lava flows due to its low viscosity (resulting from high magmatic temperatures and low silica contents). nadineklein. Mafic lava leads to weaker volcanic eruptions. Therefore, rocks are divided into ultramafic, mafic, intermediate, and felsic. Is the mantle mafic or felsic? Felsic rocks are usually light in color and have specific gravities less than 3. Most mafic minerals are dark in color, and common rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite.Common mafic rocks include basalt, diabase and gabbro.Mafic rocks often also contain calcium-rich varieties of plagioclase feldspar. This, in turn, would lead to rapid explosive ejection of the gas bubbles. Which of the following igneous rocks crystallizes near the Earth's surface? Ask Any Difference >> Science >> Difference Between Mafic and Felsic (With Table). 4.Mafic lava creates basalt while felsic lava produces andesitic and rhyolite rocks. Felsic magma or lava is higher in viscosity than mafic magma/lava. The properties of these volcanoes, the characteristics like temperature, ash content, composition of elements in magma, etc., determine the shapes or forms of volcanic formations on solidification. 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