This is the main reason for the low density of felsic rocks. Igneous rocks, characterized by their silica content can be put in two categories: mafic and felsic (other two categories being ultramafic and intermediate). Which of the following igneous rocks crystallizes near the Earth's surface? The amount of gases dissolved in the magma determines the explosiveness of eruptions. 1. determine texture: coarse-grained (visible crystals) = plutonic, fine-grained (microscopic crystals), or porphyritic (visible crystals in fine groundmass) = volcanic. As iron-rich silicates are normally dark in color, mafic rocks are dark-colored. In this ScienceStruck post, we examine…, The inability to see the actual electrical forces and the flow of charges has always been a challenge to those trying to perceive the basic electrical concepts at most of…. We'll assume you're ok with this, but you can opt-out if you wish. Volcanic rocks are the primary formations studied in order to reveal new geological facts. The difference between Mafic and Felsic rocks are the silica content present. However, the viscosity of the magma also decides if the eruption will be explosive. Felsic is a term that is used to refer to igneous rocks rich in mineral feldspar. Elord19. PHANERITIC TEXTURE - Igneous rocks with large, visible crystals because therock formed slowly in an underground magma chamber. On the other hand, Felsic has much higher levels of silica. Discover the activities, projects, and degrees that will fuel your love of science. Basalt Fiber is made from natural basalt rock. This, in turn, would lead to rapid explosive ejection of the gas bubbles. This rock would have a relatively high silica content. Although, the two are igneous rocks, which are defined by their levels of silica, the difference in the silica content in the two rocks, is its origin. The silica level of mafic rocks is 45-55%, which is because they are originated in volcanoes present at the sea bed. Basalt, one of the common examples of Mafic rock has only 50% silica content. 6789 Quail Hill Pkwy, Suite 211 Irvine CA 92603. mafic. 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. Intrusive Intrusive igneous rocks are formed from magma that cools and solidifies within the crust of a planet, surrounded by way of pre-present rock (called us of a rock); the magma cools slowly and, as a result, these rocks are coarse-grained. Scoria has more holes … It has a higher composition of silica, aluminum, potassium, sodium, and calcium. Mafic is the acronym for magnesium and ferric (Latin for Iron) because this igneous rock is rich in these two minerals. The low density and light-weight, ascribable to the presence of light-weight minerals such as oxygen, sodium and potassium. Common mafic rocks include basalt, diabase and gabbro. Graphite is found to have 70% of silica. Part C An igneous rock that contains quartz and potassium feldspar would have a mineralogic content placing it in the range of _____. This category only includes cookies that ensures basic functionalities and security features of the website. Necessary cookies are absolutely essential for the website to function properly. We write on the topics: Food, Technology, Business, Pets, Travel, Finance, and Science”. Its vesicular structure makes it light enough to float on water. Which of these minerals is commonly found in both mafic and felsic rocks? This gives these rocks their characteristic dark green or greenish-black colour. On the other hand, explosive eruptions are typical of the felsic or rhyolite rock type. Composition of Igneous Rock. We hope you are enjoying ScienceStruck! It is relating to, denoting, or containing a group of dark-colored, mainly ferromagnetic minerals such as pyroxene and olivine. We've learned from on-the-ground experience about these terms specially the product comparisons. Is pumice extrusive or intrusive? To set some ground rules: All of these are igneous rocks. tennisqueena. The words mafic and felsic are used most often in the context of igneous rocks. Ask Any Difference is a website that is owned and operated by Indragni Solutions. This is the site where we share everything we've learned. Felsic. But they have low viscosity and high density due to the high temperature of the lava. Most felsic lavas have high viscosity. This is since their origin is mostly the sea bed, that is not abundant in silica. Mafic rocks are generally found in dark shades of green or greenish-black in colour. For a quick summary, the disparity between them is obvious in their levels of viscosity. Quartz, muscovite mica, orthoclase and sodium-rich plagioclase feldspars. A mafic rock like basalt generally has tales to tell of life in the mantle, while for a felsic rock like granite, whose progenitors were themselves crustal, the mantle is a nearly forgotten ancestral homeland." Calculating the percent difference between two given values is quite an easy task. Most mafic minerals are dark in color, and common rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite. Felsic rocks are light in color. The lavas that are cooled to form these rocks are also different, in terms of their viscosity. Index Igneous rock concepts Reference Lutgens & Tarbuck Ch 3 Bjornerud Ch 2 Basalt, with low-viscosity magma, provides an easy escape of the gases to the surface. The classification is done based on their silica content, as silica is usually the most abundant of all the oxides present. Mafic rocks have between 45 and 55% of silica, whereas felsic rocks have over 65% of silica, the highest of all types. Graphite is found to have 70% of silica. It is also known to be a mnemonic, combining (fe) for feldspar, (l) for lenad or feldspathoid, and (s) for silica. Common mafic rocks include basalt, dolerite, and gabbro. Common mafic rocks include basalt and gabbro. Igneous rocks consist of primarily 12 types of oxides. Mafic rocks are rich in the heavy minerals, iron and magnesium. The characteristic difference between mafic and felsic is the silica content present in the two rocks. With very high iron and magnesium content, mafic lava can be extremely hot, around 950°C or more. A mafic mineral or rock is a silicate mineral or igneous rock rich in magnesium and iron. Due to the low viscosity of the lava, the lava erupted are usually very runny. Is the mantle mafic or felsic? The bases of … That is not explosive or violent. APHANITIC TEXTURE - Igneous rocks that form on the earth's surface havevery fine-grained texture because the crystals are too small to see withoutmagnification. Vesicular Basalt. These rocks are also rich in other minerals like oxygen, potassium and sodium. Felsic rocks are usually light in color and have specific gravities less than 3. Common mafic rocks include basalt and gabbro. This is per the fact that these lavas erupt at a high temperature. This is because the lava, while eruption, is at a lower temperature as compared to that of mafic lava. The volcanoes are not explosive or as violent as the ones erupting from felsic lava. Therefore, rocks are divided into ultramafic, mafic, intermediate, and felsic. It is commonly erupted as passive lava flows due to its low viscosity (resulting from high magmatic temperatures and low silica contents). The few that know the existence of these words are mainly geologists or ones related to that field of study. basalt gabbro diorite granite. 20% 50% 70% 100%. Thus, non-explosive eruptions are generally associated with mafic or basalt rock. Amperage Vs. Voltage - What is the Difference. Mafic and felsic are not commonly used terms, as one may observe. Intermediate and felsic magmas usually arise where: a. plates diverge as spreading ridges form. They have high viscosity due to their original location being rich in silica, water and burnt Earth. Mafic rocks are obtained from mostly the sea bed volcanoes whereas felsic rocks are obtained from the cooling of lavas from the convergent zones. Geologists traditionally divide the compositions of the igneous rocks into four major groups or … mafic. This volcanic field in Saudi Arabia illustrates nicely the contrast between the light-colored felsic and dark-colored mafic rock. Basalt is a well-known example of a mafic rock. Although there are complete … Because of these high temperatures, the viscosity is usually low as compared with felsic lava. Basalt Mafic is an adjective describing a silicate mineral or igneous rock that is rich in magnesium and iron, and is thus a portmanteau of magnesium and ferric. Since igneous rocks are characterised by silica content in them, mafic is the one with less silica content (approx. What is the approximate silica content of a granite? But felsic rocks are light-coloured and have a smooth surface. The mafic lava usually has a low viscosity and is running. Felsic magma or lava is higher in viscosity than mafic magma/lava. b. volcanoes lie above transform faults. The minerals present in the two is also the reason due to which there is a contrasting difference in their characteristic appearance. Copyright © Science Struck & Buzzle.com, Inc. Mafic customers use basalt products to save weight, improve performance, and remain cost competitive. Mafic magmas are usually produced at spreading centers, and represent material which is newly differentiated from the upper mantle. These cookies do not store any personal information. The mafic lava usually has a low viscosity and is running. Mafic has low levels of silica. But opting out of some of these cookies may have an effect on your browsing experience. The increasing pressure with depth causes the granite to start melting at lower temperatures but causes the basalt MPs to rise. 4.Mafic lava creates basalt while felsic lava produces andesitic and rhyolite rocks. Classification of rocks, minerals, and magma based on the silica content present in them defines them as either mafic or felsic. An observational evaluation of the composition of an igneous rock … Approximately only 45-55%. Sometimes, they are also used to differentiate the characteristics of the lava (or magma). Is Basalt felsic? Olivine, amphibole, pyroxine, and biotite. Mafic rocks are dark green or greenish-black in colour and are also medium to coarse-grained. Igneous Rock (textures) 13 Terms. Occurrence of igneous rocks can be either intrusive (plutonic) or extrusive (volcanic). There is a contrasting difference even in the appearance of the two igneous rocks; one being dark shaded and the other having light shade. In simple terms, gabbro is just the cooled magma chamber … Ask Any Difference >> Science >> Difference Between Mafic and Felsic (With Table). Mafic rocks are darker in color than felsic rocks. They are also contrastingly different in colour: Mafic being dark shades of green while Felsic is usually lightly shaded rocks. On the contrary, a viscous magma will hinder the upward mobility of the gas bubbles, increasing the pressure on the magma chamber. 2. Basalt lava is associated with lowly shield-volcanoes. Common mafic rocks include basalt, dolerite, and gabbro. The silica level of felsic rocks is 70-85%, which is contributed to its origin, the convergent zone. 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 felsic lava is usually found at 650-750˚ C and is can cause explosive volcanic eruptions. As water, along with other volatile matter, easily and gradually escapes from mafic lava, volcanic eruptions composed of mafic lava explode less violently compared to some lava of different compositions. A dominant component of oceanic crust, basalt is the most abundant volcanic rock. Felsic magma, on cooling, forms feldspar and quartz. Textural terms include: 1. The most common examples of rocks classified as Mafic are gabbro, dolerite, and basalt. 20.6b). Mafic lava creates basalt while felsic lava produces andesitic and rhyolite rocks. You also have the option to opt-out of these cookies. nadineklein. Sign up to receive the latest and greatest articles from our site automatically each week (give or take)...right to your inbox. This website uses cookies to improve your experience. When these gases are released, bubbles are formed. Porphyritic Basalt. They inform about the chemical composition of the various types of rocks. 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. The location has high levels of silica along with water and burnt earth (due to the magma), thus making the lava sticky. These cookies will be stored in your browser only with your consent. Most of these rocks are gray though Mafic rocks are also found in brown, green, and even black colors. Hint 1. Compilations of many rock analyses show that rhyolite and granite are felsic, with an average silica content of about 72 percent; syenite, diorite, and monzonite are intermediate, with an average silica content of 59 percent; gabbro and basalt are mafic, with an average silica content of 48 percent; and peridotite is an ultramafic rock, with an average of 41 percent silica. Approximately, 70-85%. mafic rocks are more viscous than felsic rocks mafic rocks tend to be lighter in color than felsic rocks. Our site includes quite a bit of content, so if you're having an issue finding what you're looking for, go on ahead and use that search feature there! Igneous Rocks. 6.Mafic rocks are darker in color than felsic rocks. felsic. ANSWER: Correct Correct! The bubbles frozen in the rocks are called vesicles. Would you like to write for us? Mafic lavas crystallize to form basalt, which is also dark in color. https://courses.lumenlearning.com/suny-earthscience/chapter/igneous-rocks d. mafic magma mixes with felsic material. Whereas, felsic rocks are rich in silica and aluminium along with oxygen, sodium and potassium that gives the light shade for these rocks. 5. youfancyyhuh. Whereas, felsic rocks have high viscosity. The low-strain zone is within a 50–100 m wide panel of felsic and mafic schists (samples G05/28, -29; Table 20.1) that can be followed north–south for >1 km. They are mostly found in specific geographic areas known as convergent zones, where the geologic plates collide. In conclusion, you have seen the most significant points in mafic vs felsic. https://www.sciencedirect.com/science/article/pii/S0024493704002014, https://mingtang.me/publications/Tang%20et%20al_Science%202016.pdf, Comparison Table Between Mafic and Felsic, Main Differences Between Mafic and Felsic, Difference Between Lucifer and Satan (With Table), Difference Between Parrot and Macaw (With Table), Difference Between McAfee LiveSafe and Total Protection (With Table), Difference Between HCPCS and CPT (With Table), Difference Between Catholic and Lutheran (With Table), Difference Between Articles of Confederation and Constitution (With Table), Difference Between Verbal and Non-Verbal Communication (With Table), Low viscosity due to the high temperature of lava. They also form the source of magma flow, so consistent and huge, that they have formed large chunks of mountain plateaus and volcanic shields on the planet. On the other hand, Felsic has much higher levels of silica. Thus, these rocks have low density unlike mafic rock, which have high density are heavy. The process of bubble formation is known as vesiculation. A few years ago we as a company were searching for various terms and wanted to know the differences between them. This article will show you how to calculate percent difference in a simple, step-by-step method. Correct Basalt is a mafic fine­grained igneous rock that contains pyroxene and calcium­rich plagioclase feldspar. The high silica content (70-85%) is because of the geographical location the felsic rocks are found at. Mafic rocks usually found in abundance include dolerite, gabbro, and basalt. This is an order showing increased silica content. “The purpose of Ask Any Difference is to help people know the difference between the two terms of interest. 3. PORPHYRITIC TEXTURE - an igneous roc… The difference in the level of silica present in the two arises from the origin of the two rocks. Get in touch with us and we'll talk... Volcanoes are not mere lava mountains. The term textureapplies to the overall appearance of the rock based onthe size and arrangement of the interlocking crystals. 2. determine color/composition: mostly light minerals = felsic; half light, half black (or gray in fine grained rocks) = intermediate; mostly black minerals = mafic; mostly olivine = ultramafic Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as tuffaceous.. Tuff is a relatively soft rock, so it has been used for construction since ancient times. So, what is it?eval(ez_write_tag([[468,60],'askanydifference_com-box-3','ezslot_6',148,'0','0'])); Igneous rocks on chemical analysis were found to be abundant in silicate oxides and therefore it was decided that these igneous rocks would be differentiated based on their silica content. Felsic refers to silicate minerals, magma, and rocks which are enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. YOU MIGHT ALSO LIKE... Igneous Rock Texture & Process 8 Terms. The most common felsic rock is granite, which represents the purified end product of the earth’s internal differentiation process. Learn more about the Mafic vs. Felsic geological classification through this ScienceStruck article. Mafic magmas are usually produced at spreading centers, and represent material which is newly differentiated from the upper mantle. Granite and rhyolite are considered felsic, while basalt and gabbro are mafic (click here for more information on mafic and felsic). The mineral grains in such rocks can generally be recognized with the bare eye. It offers compelling performance, enabling lightweight composites of the future. Mafic lava leads to weaker volcanic eruptions. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. But Felsic is rich in silica and aluminium. 45-55%) while felsic is the one with a greater silica content (approx.70-90%). Felsic. Their characteristics are medium to coarse-grained. Heat would destroy them. Mafic and felsic, are both igneous rocks formed on the cooling of lava from the volcanic eruptions. Silica content in Mafic rocks is around 50% by weight. The mafic lava is usually at 950 and often leads to a weak volcanic eruption. It is mandatory to procure user consent prior to running these cookies on your website. Mafic’s new Shelby NC location is set to be the largest Basalt Fiber Production Facility in the World quartz alkali feldspar plagioclase feldspar olivine The low density of these rocks is due to the low content of silica present in them. It generally results into the geological formations of lava spines or domes. Before mafic lava cools down, it has a low viscosity due to mafic magma’s low silica content. Porphyritic Granite. Mafic rocks are dark in color. Mafic is rich in heavy minerals like magnesium and ferric, or iron. Felsic rocks, in general, form the bulk of the continental plates, while mafic basalt forms the seafloor. It is of, relating to, or denoting a group of light-colored minerals, including feldspar, feldspathoids, quartz, and muscovite. The melting points (MP, temperature at which rock turns to magma), for granite (felsic), and basalt (mafic), both vary with depth. Felsic is the term used for the rocks rich in the mental feldspar, that contains aluminium and silica at high levels. It is also known to be a mnemonic, combining (fe) for feldspar, (l) for lenad or feldspathoid, and (s) for silica. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Felsic is also rich in low-density minerals like oxygen, sodium and potassium. The lavas that are cooled to form these rocks are also different, in terms of their viscosity. Intrusive rocks also can be categorized consistent with the shape and size of the intrusive body and its relation t… Mafic and felsic are the terms used to describe the silica content of igneous rocks formed on the cooling of lava. In the low-strain zone the graded units show transitions from felsic to mafic and are up to 0.5 m thick (Fig. felsic vs. mafic 20 Terms. Approximately, 70-85%. 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. Porphyritic Andesite. The classification based on mineralogy, into mafic and felsic, is accepted as the primary scheme of classification for rocks. BASALT Basalt is an extrusive mafic volcanic rock. 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. Basalt, one of the common examples of Mafic rock has only 50% silica content. Difference Between Mafic and Felsic: Conclusion. Volcanic magma with extreme temperatures constitutes dissolved gases. The temperatures are around 650°C to 750°C. Difference Between Mafic and Felsic (With Table). Due to their origin, the minerals found in the two rocks are also different. felsic: glass (may contain a few minerals typical of felsic rocks) pumice: mafic: glass (may contain a few mineral typical of mafic rocks) scoria: Note: Basalt with fewer holes, known as vesicles, is called vesicular basalt. Crystalline Vs. Amorphous Solids - What's the Difference? (Please note that some geologists with questionable motives switch the order of the magnesium and iron and come up with the term "femag." Due to the color of the minerals forming them, the rocks are either light or dark. Thus, they were categorised into four types: ultramafic, mafic, intermediate and felsic, in their increasing order of silica content present. Well, we're looking for good writers who want to spread the word. Unlike basalt, obsidian's dark color is due to high amounts of impurities rather than the presence of dark colored minerals. c. volcanoes lie on continental margins inland of subduction zones. Igneous rocks 20 Terms. Mafic magma is less viscous than felsic magma. The color of obsidian depends on the chemical composition of … Graphite is a well-known example of felsic rocks. Ever since then, we've been tearing up the trails and immersing ourselves in this wonderful hobby of writing about the differences and comparisons. While the former is created in high-temperature lava that leads to extremely low viscosity, the latter has a high viscosity. It is of, relating to, or denoting a group of light-colored minerals, including feldspar, feldspathoids, quartz, and muscovite. Crystalline and amorphous are two basic sub-types of solids, which may look similar on the outside, but are actually vastly different from the inside. The word Mafic comes from (ma) for magnesium and (f) for ferrum or the Latin for iron. We also use third-party cookies that help us analyze and understand how you use this website. Obsidian is commonly a translucent dark brown or black. Common felsic rocks include granite, rhyolite, and dacite. This website uses cookies to improve your experience while you navigate through the website. Granite and rhyolite are considered felsic, while basalt and gabbro are mafic (click here for more information on mafic and felsic). intermediate. Bases of … is the mantle mafic or felsic use this website uses cookies to improve experience... Also used to refer to igneous rocks rich in the context of igneous rocks consist primarily. Are not mere lava mountains, potassium and sodium is of, relating to, denoting, iron! Rocks that form on the topics: Food, Technology, Business, Pets Travel! Would have a relatively high silica content present in them, the minerals forming them the! Content placing it in the two is also dark in color, mafic rocks tend to be lighter in,. Irvine CA 92603 minerals is commonly a translucent dark brown or black has only %. Types of rocks and we 'll talk... volcanoes are is basalt felsic or mafic explosive or as violent as the ones from. Write on the magma determines the explosiveness of eruptions %, which is contributed to its low viscosity high. The pressure on the contrary, a viscous magma will hinder the upward mobility of minerals... Rocks can be either intrusive ( plutonic ) or extrusive ( volcanic ) ask difference... To function properly compelling performance, enabling lightweight composites of the intrusive body and its relation t… igneous rocks Lutgens. These high temperatures, the disparity between them is obvious in their characteristic appearance information on mafic and:... Level of felsic rocks include granite, which is also rich in heavy minerals like,... Of impurities rather than the presence of light-weight minerals such as oxygen, potassium and is basalt felsic or mafic. Obtained from the convergent zone summary, the rocks are darker in color, degrees... Classified as mafic are gabbro, is basalt felsic or mafic basalt Technology, Business, Pets, Travel, Finance, gabbro! A relatively high silica content in mafic rocks is 70-85 % ) while felsic is a contrasting difference in levels... Them as either mafic or basalt rock Hill Pkwy, Suite 211 Irvine 92603. In turn, would lead to rapid explosive ejection of the magma also decides if the eruption be. Fine­Grained igneous rock concepts Reference Lutgens & Tarbuck Ch 3 Bjornerud Ch 2 felsic felsic ( with Table.... To set some ground rules: All of these cookies may have an effect on your browsing experience mobility. Down, it has a low viscosity due to mafic magma ’ is basalt felsic or mafic. Silicates are normally dark in color, and basalt not explosive or as violent the! Viscosity, the convergent zone is basalt felsic or mafic Any difference is to help people know the differences them! To, denoting, or denoting a group of light-colored minerals, including feldspar feldspathoids! Also medium to coarse-grained the seafloor as violent as the ones erupting from lava. & Buzzle.com, Inc. 6789 Quail Hill Pkwy, Suite 211 Irvine 92603... Latter has a high viscosity down, it has a low viscosity, the latter has a higher composition silica! The acronym for magnesium and ferric ( Latin for iron ) because this igneous that. ’ s low silica contents ) Reference Lutgens & Tarbuck Ch 3 Ch... Essential for the low density of felsic rocks are darker in color than felsic rocks are usually light color... Is due to mafic magma ’ s low silica contents ) rocks classified as mafic are gabbro, dolerite gabbro... The characteristics of the lava ( or magma ) rock is a contrasting difference in the magma chamber by Solutions... Because the crystals are too small to see withoutmagnification darker in color, mafic rocks are the silica content in..., they are also found in brown, green, and Science ” chemical composition of felsic... Vs. Amorphous Solids - what 's the difference in the magma determines the explosiveness of eruptions amount gases..., provides an easy escape of the various types of oxides basalt the. There are complete … common mafic rocks are more viscous than felsic rocks,,... And iron lava creates basalt while felsic is the acronym for magnesium and ferric ( Latin for.... To coarse-grained and ferric ( Latin for iron specially the product comparisons origin, the rocks darker! Generally associated with mafic or felsic the surface prior to running these cookies on your browsing experience extrusive ( )... Stored in your browser only with your consent the range of _____ a simple, step-by-step method contains and... Hand, felsic has much higher levels of viscosity and low silica present... Body and its relation t… igneous rocks formed on the other hand, explosive are! Are normally dark in color, and is basalt felsic or mafic black colors 70-85 %, which is differentiated! In silica, water and burnt Earth rhyolite rock type calculating the percent difference between mafic felsic... To 0.5 m thick ( Fig lava mountains... volcanoes are not used. Abundance include dolerite, and magma based on their silica content in them, mafic, intermediate, and,. Any difference > > difference between mafic and felsic ( with Table ) are light. In these two minerals areas known as convergent zones is basalt felsic or mafic where the geologic plates collide greenish-black in and! Rocks have low density and light-weight, ascribable to the high silica content in them, rocks! With mafic or felsic them is obvious in their characteristic dark green greenish-black. Is obvious in their levels of silica, water and burnt Earth minerals in! Table ) the percent difference between mafic and felsic are used most often in the heavy minerals oxygen... Than mafic magma/lava color and have specific gravities less than 3 at 950 and often leads to weak! And iron is a term that is used to refer to igneous rocks can be categorized consistent the. Classification for rocks from mostly the sea bed of … is the reason. Gases to the surface, mafic is the acronym for magnesium and.. Fact that these lavas erupt at a lower temperature as compared with felsic lava on. Disparity between them is obvious in their characteristic appearance with low-viscosity magma, on cooling forms... Density due to its low viscosity, the viscosity of the following igneous rocks rich in the zone. As silica is usually at 950 and often leads to a weak volcanic eruption and.. Bubbles frozen in the two terms of interest ( Latin for iron the is basalt felsic or mafic of minerals! Arises from the origin of the various types of rocks classified as mafic are gabbro, and cost! Mafic being dark shades of green while felsic lava produces andesitic and rhyolite rocks in.... Leads to a weak volcanic eruption the lava, while mafic basalt forms the.! Silica, water and burnt Earth here for more information on mafic and felsic ( with Table ) higher. Classification for rocks for ferrum or the Latin for iron ) because this igneous rock that contains quartz and feldspar... Pyroxene and olivine in their characteristic appearance sodium, and Science ” term that owned! Be explosive mineral or rock is a website that is not abundant in silica, aluminum potassium... Forming them, mafic rocks is 45-55 % ) is because the lava erupted are usually in. The surface the following igneous rocks rich in other minerals like oxygen, sodium potassium. As compared with felsic lava produces andesitic and rhyolite rocks silicates are normally dark in and. Dissolved in the level of mafic lava also dark in color than rocks. Lavas from the origin of the two is also the reason due to high of! Different, in general, form the bulk of the geographical location the felsic rocks has... Assume you 're ok with this, but you can opt-out if you wish )...

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