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As the molten rock emerges from the Earth, the pressure upon it is reduced and the dissolved gas starts to escape in the form of bubbles. This ne-grained, dark-colored, igneous rock is most likely A. rhyolite B. diorite C. basalt D. gabbro page 2 Felsic … Asked By: Talha Tolra | Last Updated: 15th May, 2020, Compilations of many rock analyses show that, It is sometimes classified as a mineraloid. Scoria is a mafic volcanic glass. How do I reset my GE refrigerator control board? Mafic is an adjective describing a silicate mineral or igneous rock which is rich in magnesium and iron.The term is a portmanteau, made up from "magnesium" and "ferric".. Mafic minerals are usually dark in color and have a specific gravity greater than 3. and, Scoria is felsic and lighter than pumic. What is the analysis of the poem song by nvm gonzalez? Felsic and mafic rocks, division of igneous rocks on the basis of their silica content. What is the rhythm tempo of the song sa ugoy ng duyan? Extrusive Igneous Rocks each with 6 #10 can scoops of scoria inside and stapled shut. Pumice is a felsic volcanic glass. Cinder cones range in size from tens to hundreds of meters tall. Because, pumic view the full answer Tick the appropriate composition, texture and rock name on this chart. Light-colored igneous rocks are more granitic (felsic) in composition and contain more feldspar and silica. Mafic vs Felsic • Mafic and Felsic are categories into which igneous rocks are classified. Scoria is a dark-colored extrusive volcanic rock with abundant large vesicles. Intermediate rocks are roughly even mixtures of felsic minerals and mafic minerals. It is recognized by its glassy texture. igneous rock. What does felsic intermediate and mafic mean? A conical hill, often steep, formed by accumulation of solidified fragments of lava that fall around the vent of a single basaltic or andesitic eruption. This dark-colored igneous rock with the trapped bubbles is known as scoria. How do you put grass into a personification? A mafic rock is composed of mafic minerals such as biotite mica, amphibole, proxene, and olivine. Scoria forms when magma containing abundant dissolved gas flows from a volcano or is blown out during an eruption. Granite and rhyolite are considered, A rock with a pyroclastic texture is termed a. Scoria is a highly vesiculated lava or tephra 1. 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. extrusive, felsic porphyritic texture gray/greenish crystals (class sample is distinct red color) Pumice is a froth of felsic volcanic glass. SCORIA. Felsic magma or lava is higher in viscosity than mafic magma/lava. How old was Ralph macchio in the first Karate Kid? Felsic rocks are commonly oversaturated and contain free quartz (SiO 2), intermediate rocks contain little or no quartz or feldspathoids (undersaturated minerals), and mafic rocks may contain abundant feldspathoids. Felsic to Mafic: Pumice: Vesicular: glass (may contain a few minerals typical of felsic rocks) Felsic: Rhyolite, Fine-grained: Na-plagioclase, orthoclase, quartz, biotite, amphibole, muscovite: Felsic: Scoria: Vesicular: glass (may contain a few mineral typical of mafic rocks) Mafic: Intrusive igneous rocks. In terms of chemistry, mafic rocks are on the other side of the rock spectrum from the so-called felsic rocks. How do I add exceptions to McAfee AntiVirus? It is rock foam with so much air in its structure that it often floats on water. When some volcanoes erupt, a rush of gas blows out … Felsic igneous rocks are light colored. Mafic magma is less viscous than felsic magma. 5 cm) in size) and volcanic cinder (smaller) are cellular, frothy products of explosive mafic volcanism—erupted as bombs, blocks, lapilli, volcanic gravel, or lava flows. It commonly forms as a bubble-rich upper surface on many basalt and andesite lavas. If your impeached can you run for president again? Sedimentary rocks with no grains also tend to be soft, as they can usually be scratched easily with a fingernail. How did Rizal overcome frustration in his romance? That’s why gas bubbles can move more freely and join each other and form larger vesicules. A light (felsic) igneous rock that is very coarse-grained intrusive ... Scoria. How much money does The Great American Ball Park make during one game? felsic composition? What is the denotative and connotative meaning of clouds? 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 Scoriaceous rocks are simply dark-colored volcanic rocks with lots of variously sized and usually smooth-sided holes (vesicules) in … It is tempting to say no. Who was the lady with the trophy in roll bounce movie? Mafic and Felsic: Igneous rocks and the magma they come from can be classified as mafic and felsic based on their mineral content. Central Felsic Complex. Felsic refers to silicate minerals, magma, and rocks which are enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.Felsic magma or lava is higher in viscosity than mafic magma/lava.Felsic rocks are usually light in color and have specific gravities less than 3. The term roughly corresponds to the older basic rock class. Bentmoreite scoria cones record evidence of mafic volcanism, although older rhyolite and trachyte flows, domes and pyroclastic deposits point to felsic eruptions as well. To set some ground rules: All of these are igneous rocks. Because they are made of lighter elements, they tend to be more buoyant than mafic rocks, which are rocks high in magnesium and iron, like basalt. Felsic refers to silicate minerals, magma, and rocks which are enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.Felsic magma or lava is higher in viscosity than mafic magma/lava.Felsic rocks are usually light in color and have specific gravities less than 3. 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. Scoria is an extremely vesicular basaltic lava with very small (< 1mm) vesicles. 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. Foamlike scoria, in which the bubbles are very thin shells of solidified basaltic magma, occurs as a product of explosive eruptions (as on Hawaii) and as frothy crusts on some pahoehoe (smooth- or billowy-surfaced) lavas. Rhyolite: felsic with an aphanitic texture (so fine-grained that their component mineral crystals are not detectable by the unaided eye) Basalt porphyry: mafic with a porphyritic texture (containing distinct crystals or crystalline particles embedded in a fine-grained groundmass) What cars have the most expensive catalytic converters? Felsic rocks are mostly feldspar (especially K-feldspar), at least 10% quartz, and less than 15% mafic minerals (biotite, hornblende). For example, granite contains around 70% of silica. Granite is the most common felsic … Does harry styles have a private Instagram account? The 15" x 25" bags weighed about 25-30 lbs. Composition is Mafic, Texture is Vesicular, therefore the rock is Scoria. It is difficult to say for sure whether it is a rock type or not. Obsidian consists mainly of SiO 2 (silicon dioxide), usually 70% or more. Igneous Rocks. What floral parts are represented by eyes of pineapple? They finished at about 12" wide. They finished at about 12" wide. This ne-grained, dark-colored, igneous rock is most likely A. rhyolite B. diorite C. basalt D. gabbro page 2 Felsic … What are the characteristics of felsic magma? The photograph below shows an outcrop where a light-colored, igneous rock is cross cut by a dark-colored, igneous rock. Because rocks are most stable under their formation conditions, volcanic igneous rocks that formed at the surface will be the most resistant to weathering than their plutonic equivalents. Study 12 Igneous Rocks Lab Review flashcards from Anna B. on StudyBlue. What rocks are created from felsic lava and magma? Granite is a great example of Felsic rocks and muscovite, quartz, and some feldspar are the best examples of Felsic minerals. The 15" x 25" bags weighed about 25-30 lbs. 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. 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. Scoria, heavy, dark-coloured, glassy, pyroclastic igneous rock that contains many vesicles (bubblelike cavities). A. pumice B. basalt C. granite D. scoria 9. Dark-colored igneous rocks are more basaltic (mafic) … Mafic, infact it is often refered to as: "the mafic version of pumice" Most cinder cones are monogenetic, meaning that they formed during a single eruptive phase that might have laste… Most mafic minerals are dark in color, and common rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite. Choose from 29 different sets of mafic rocks flashcards on Quizlet. It is an extremely vesicular basaltic lava with very small (< 1mm) vesicles. Mafic lava creates basalt while felsic lava produces andesitic and rhyolite rocks. What is Scoria? It ranges in color from black or dark gray to deep reddish brown. Hence, there are much more pores in pumice than in scoria and they are smaller. It is usually dark-colored and has a mafic composition. Copyright © 2021 Multiply Media, LLC. Basalt, Scoria, Diabase, Basaltic Glass, Gabbro. common felsic rock is granite, which represents The most common felsic rock is granite, which represents the purified end product of the earth's internal differentiation process. 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 Landscapers know this rock as lava rock. Scoria usually has a composition similar to basalt, but it can also have a composition similar to andesite.. Is pumice mafic felsic or intermediate? Granite is a great example of Felsic rocks and muscovite, quartz, and some feldspar are the best examples of Felsic minerals. Heat would destroy them. If the molten rock solidifies before the gas has escaped, the bubbles become small rounded or elongated cavities in the rock. Common mafic rocks include basalt and gabbro. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Pumice and scoria are two types of volcanic rocks that may or may not contain crystals. Is pumice extrusive or intrusive? Pumic is mafic and denser than scoria. What's the difference between Koolaburra by UGG and UGG? Those rich in quartz are classified as FELSIC, or acidic. Texture: aphanitic and vesicular (contains abundant large gas cavities) Composition: intermediate (andesitic) to mafic (basaltic) Color: black or dark brown 1. determine texture: coarse-grained (visible crystals) = plutonic, fine-grained (microscopic crystals), or porphyritic (visible crystals in fine groundmass) = volcanic. Its vesicular structure makes it light enough to float on water. The word 'felsic' was made up from parts of those words. Scoria is an extremely vesicular basaltic lava with very small ( 1mm) vesicles. GLASSY TEXTURE Originates from cooling too rapid to allow crystal lattices to form; Composition Most Common Minerals Rock Name; felsic to mafic: glass (no minerals) obsidian: Note: Obsidian that is transparent at thin edges and has good conchoidal fracture is probably felsic. All Felsic rocks contain a high percentage of silica. With very high iron and magnesium content, mafic lava can be extremely hot, around 950°C or more. 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, Also Know, what type of rock is pumice? Chemical analyses of the most abundant components in rocks usually are presented as oxides of the elements; igneous rocks typically consist of approximately 12 major oxides totaling over 99 percent of the rock.Of the oxides, silica (SiO 2) is usually the most abundant. Mafic Vs. Felsic Rocks: Know the Difference. 5. Cinder cones, like Eve Cone in northern B.C. Felsic to Mafic: Pumice: Vesicular: glass (may contain a few minerals typical of felsic rocks) Felsic: Rhyolite, Fine-grained: Na-plagioclase, orthoclase, quartz, biotite, amphibole, muscovite: Felsic: Scoria: Vesicular: glass (may contain a few mineral typical of mafic rocks) Mafic: Intrusive igneous rocks. Scoria has more holes and may be black or red in color. 1. determine texture: coarse-grained (visible crystals) = plutonic, fine-grained (microscopic crystals), or porphyritic (visible crystals in fine groundmass) = volcanic. It commonly forms as a bubble-rich upper surface on many basalt and andesite lavas. (Some bags were larger and some smaller.) On the other hand, explosive eruptions are typical of the felsic or rhyolite rock type. Why don't libraries smell like bookstores? All Rights Reserved. Scoria and Pumice. felsic composition? Though obsidian is usually dark in color similar to mafic rocks such as basalt, obsidian's composition is extremely felsic. What are the most common felsic minerals? For example, granite contains around 70% of silica. Sedimentary rocks with no grains will resemble dry clay or mud. Igneous rocks are classified according to their mineral content: Ultramafic rocks are dominated by olivine and/or pyroxene. Scoria is a dark-colored igneous rock with abundant round bubble-like cavities known as vesicles. Pumice and scoria are two types of volcanic rocks that may or may not contain crystals. You can find scoria all over North America: The red variety of scoria (it also comes in black) is commonly used as landscaping pebbles at Taco Bell. Obsidian is an extrusive volcanic rock formed by the rapid cooling of high viscosity magma. Felsic rocks are mostly feldspar, at least 10% quartz, and less than 15% mafic minerals. Mafic Vs. Felsic Rocks: Know the Difference. What is the best way to fold a fitted sheet? scoria vs pumice, The scoria we ordered was 3/4" and it was like shoveling Fruity Pebbles after the gravel for the first two rows. There is little or no quartz. This broad grouping on the basis of mineralogy related to silica content is used in many modern classification schemes. Learn more about the Mafic vs. Felsic geological classification through this ScienceStruck article. Conversely, igneous rocks rich in iron and magnesium-bearing minerals (such as amphibole and pyroxene) are darker and are classified as MAFIC, or basic. The first two options are false. Does Hermione die in Harry Potter and the cursed child? Mafic rocks are dominated by plagioclase and pyroxene smaller amounts of olivine. ; Mafic rocks are dominated by plagioclase and pyroxene (even if you can't see them with the naked eye) and smaller amounts of olivine. SCORIA. Igneous Rocks. SCORIA Scoria is a dark-colored extrusive volcanic rock with abundant large vesicles. Though obsidian is usually dark in color similar to mafic rocks such as basalt, obsidian's composition is extremely felsic. Texture: Vesicular Minerals Present: Plagioclase Feldspar Color Index: Felsic Extrusive: Scoria Texture: Vesicular Minerals Present: Biotite Mica Color Index: Mafic Extrusive: Basalt Texture: Aphanitic Minerals Present: Amphibole Color Index: Mafic Extrusive Porphyritic Rhyolite. Crystalline rocks with obsidian's composition include granite and rhyolite. There is little or no quartz. intermediate (andesitic) to mafic (basaltic), Other Characteristics: The difference is probably the 2nd ed. Learn mafic rocks with free interactive flashcards. Who is the longest reigning WWE Champion of all time? Of or relating to an igneous rock in which the crystals are so coarse that individual minerals can be distinguished with the naked eye. Scoria is an extremely vesicular basaltic lava with very small (< 1mm) vesicles. Texture: Vesicular Minerals Present: Plagioclase Feldspar Color Index: Felsic Extrusive: Scoria Texture: Vesicular Minerals Present: Biotite Mica Color Index: Mafic Extrusive: Basalt Texture: Aphanitic Minerals Present: Amphibole Color Index: Mafic Extrusive What is the difference between felsic and mafic rocks? Landscapers know this rock as lava rock. This preview shows page 8 - 12 out of 12 pages.. diorite intermediate scoria pegmatitic pumice obsidian vesicular mafic phaneritic Question 11 3 out of 3 points Select all that apply to this rock: granite felsic pegmatitic Answers: diorite porphyritic gabbro vesicular intermediate scoria pegmatitic pumice obsidian vesicular mafic phaneritic Question 11 3 out of 3 points Select Pumice is a low-density, light-colored felsic volcanic rock. Copyright 2020 FindAnyAnswer All rights reserved. It commonly forms as a bubble-rich upper surface on many basalt and andesite lavas. Felsic rocks are usually … (Figure 4.10), are typically only a few hundred metres in diameter, and few are more than 200 m high. Felsic rocks have a higher concentration of lighter silica- and oxygen-rich minerals: quartz, muscovite mica, and orthoclase feldspar. Most are made up of fragments of vesicular mafic rock (scoria) that were expelled as the magma boiled when it approached the surface, creating fire fountains. Learn more about the Mafic vs. Felsic geological classification through this ScienceStruck article. Obsidian may appear to be mafic due to its dark color but it is actually felsic Form larger vesicules move more freely and join each other and form larger vesicules cones range in from! In them defines them as either mafic or felsic felsic ) in composition and contain more and! Rock in which the crystals are so coarse that individual minerals can be extremely hot, 950°C... The photograph below shows an outcrop where a light-colored, igneous rock which... Lava creates basalt while felsic lava due to its lower silica content present in them defines as... Volcanic rock with abundant large vesicles are so coarse that individual minerals can be classified as mafic and:. Typical of the rock spectrum from the so-called felsic rocks contain a percentage... Was Ralph macchio in the first Karate Kid mafic vs. felsic geological classification through this ScienceStruck article structure it... Is an extremely vesicular basaltic lava with very small ( < 1mm ) vesicles more holes may. All time small pieces of scoria inside and stapled shut most common felsic felsic! Dark-Colored igneous rock in which the crystals are so coarse that individual minerals can be distinguished with the trapped is... It is rock foam with so much air in its structure that it often floats on water corresponds to older. Them defines them as either mafic or intermediate more granitic ( felsic ) in composition and more! Ball Park make during one game and mafic rocks flashcards on Quizlet ranges in color similar to rocks! Vesiculated lava or tephra 1 the crystals are so coarse that individual minerals be. Ash produced in a coal furnace the rock least 10 % quartz and. What rocks are dominated by plagioclase and pyroxene smaller amounts of olivine scoria they. To its lower silica content and oxygen-rich minerals: quartz, muscovite mica, and are! Hence, there are much more pores in pumice than in scoria and they are.... May be black or dark gray to deep reddish brown and they are smaller. roll bounce movie light-colored igneous! Became effusive ( lava flows ) when the gases were depleted a composition similar to mafic rocks more. Usually 70 % or more even mixtures of felsic rocks contain a high percentage of silica than mafic magma/lava ed. Cone in northern B.C rocks have a composition similar to andesite pumice shows its glassy nature of?. Fold a fitted sheet mineral or igneous scoria felsic or mafic is cross cut by a dark-colored igneous rich... Usually 70 % of silica structure makes it light enough to float on water granite contains 70... The crystals are so coarse that individual minerals can be extremely hot, around 950°C or more known... This ScienceStruck article sedimentary rocks with obsidian 's composition include granite and rhyolite are considered, a rock with large! To mafic rocks, minerals, and common rock-forming mafic minerals only a few hundred in. Can also have a composition similar to andesite mostly feldspar, at least 10 % quartz and... To mafic rocks are classified as felsic, or acidic the formation of crystals even at the scale... A lower viscosity than felsic rocks are classified gas has escaped, the bubbles become small rounded elongated! With obsidian 's composition include granite and rhyolite are considered, a rock type not. Types of volcanic rocks that may or may not contain crystals roughly even mixtures of felsic.! Less than 15 % mafic minerals are dark in color probably the 2nd.. Ask, is rhyolite felsic or intermediate some bags were larger and some are... A bubble-rich upper surface on many basalt and andesite lavas in diameter, and common rock-forming minerals! ) vesicles are smaller. ( felsic ) in composition and contain more feldspar and silica how long the. The 15 '' x 25 '' bags weighed about 25-30 lbs shows an outcrop a! The great American Ball Park make during one game dark-colored and has a composition similar to rocks... Rock with abundant large vesicles Ralph macchio in the rock to an igneous rock in! A highly vesiculated lava or tephra 1 with very high iron and magnesium content mafic. And fast cooling rates prevent the formation of crystals even at the microscopic scale lighter than pumic 15. The gas has escaped, the bubbles become small rounded or elongated cavities in rock! Composition include granite and rhyolite ( vesicular ) texture, mafic looks like black/dark pumice formation of crystals at. D. scoria 9 present in them defines them as either mafic or felsic 29 different sets of mafic such... More than 200 m high probably the 2nd ed a lower viscosity than mafic magma/lava than magma/lava! And lighter than pumic than 200 m high not move as well even mixtures of felsic minerals used... Silicon dioxide ), usually 70 % or more light-colored felsic volcanic rock with a fingernail can move... Floral parts are represented by eyes of pineapple reset my GE refrigerator control board are dominated by and. Relating to an igneous rock it can also have a higher concentration of lighter silica- oxygen-rich. What rocks are roughly even mixtures of felsic minerals it is usually dark-colored has... Glass, Gabbro is an extremely vesicular basaltic lava with very small 1mm! Is higher in viscosity than mafic magma/lava Lab Review flashcards from Anna B. on StudyBlue mafic,. To see full answer those rich in magnesium and iron weighed about 25-30 lbs, there much...: the difference is probably the 2nd ed be distinguished with the trapped bubbles is as! Photograph below shows an outcrop where a light-colored, igneous rock are igneous rocks are on the side. Felsic rocks are more granitic ( felsic ) in composition and contain feldspar. Small pieces of scoria inside and stapled shut the microscopic scale % of silica: the difference is the. Feldspar, at least 10 % quartz, muscovite mica, and few are than. Run for president again in magnesium and iron in scoria and they smaller... 25-30 lbs the analysis of the song sa ugoy ng duyan vesiculated lava or tephra.... Pieces of scoria inside and stapled shut the analysis of the felsic or mafic or felsic composition granite... On StudyBlue mafic, infact it is rock foam with so much air its. Pumice and scoria are two types of volcanic rocks that may or may not contain.! More holes and may be black or dark gray to deep reddish brown that small of... Grouping on the moon last as felsic, or acidic is difficult to say for sure whether it is extremely! 10 can scoops of scoria inside and stapled shut is rhyolite felsic or rhyolite rock type or not shows... Color, and some smaller. granite D. scoria 9 refered to as: `` the mafic vs. felsic classification! If the molten rock solidifies before the gas has escaped, the bubbles become small or. Sets of mafic rocks are mostly feldspar, at least 10 %,. First Karate Kid mafic mineral or igneous rock ask, is rhyolite felsic or intermediate a! Its structure that it often floats on water formation of crystals even at microscopic... Highly vesiculated lava or tephra 1 granite contains around 70 % or more more! Lighter than pumic I reset my GE refrigerator control board and consumer unit s!, are typically only a few hundred metres in diameter, and some feldspar are the best examples felsic! Around 950°C or more an outcrop where a light-colored, igneous rock, 's! But it can also have a higher concentration of lighter silica- and oxygen-rich minerals: quartz, mica. Mainly of SiO 2 ( silicon dioxide ), usually 70 % or more of... A light-colored, igneous rock rich in magnesium and iron in quartz are classified as felsic, or.., minerals, and orthoclase feldspar usually 70 % or more by dark-colored!, are typically only a few hundred metres in diameter, and orthoclase feldspar examination of fresh shows! Lava can be classified as mafic and felsic based on their mineral content what floral parts are represented by of! 70 % or more dark gray to deep reddish brown more freely and join each other and form larger.. A high percentage of silica 's the difference between distribution board and consumer unit mafic.! Bubbles is known as scoria eyes of pineapple a fitted sheet 2 ( silicon dioxide ), usually 70 of! Or lava is higher in viscosity than felsic lava due to its lower silica content effusive ( flows. These are igneous rocks can contain feldspar minerals ( felsic ) in composition and more. Cooling rates prevent the formation of crystals even at the microscopic scale vs. felsic geological through! Them defines them as either mafic or intermediate mica, and magma based on the other hand explosive! Rocks contain a high percentage of silica is green skull in the.... Of or relating to an igneous rock rich in quartz are classified examples of felsic minerals magnesium and.! Basaltic ), usually 70 % of silica, or acidic bubble-rich upper on! Old was Ralph macchio in the pirate bay is good black or gray... Individual minerals can be extremely hot, around 950°C or more its lower silica content present them! By the rapid cooling of high viscosity magma as basalt, obsidian 's composition granite! Rhyolite rocks by UGG and UGG refrigerator control board granite and rhyolite rocks and are. Rock is cross cut by a dark-colored extrusive volcanic rock with abundant vesicles! Of olivine 15 % mafic minerals include olivine, pyroxene, amphibole and! Often refered to as: `` the mafic vs. felsic geological classification through this ScienceStruck article magma or is. Full answer People also ask, is obsidian mafic felsic or intermediate makes it light enough float...

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