Select a subject to preview related courses: Diorite is another type of intrusive igneous rock. Extrusive, or volcanic, igneous rock cools on the surface as lava. Pockets of magma (labeled A here) come up from the mantle and push their way through weak spots in the earth's crust, often under volcanoes. Igneous rocks are extrusive and intrusive. Sciences, Culinary Arts and Personal lessons in math, English, science, history, and more. Batholiths. Intrusive Igneous Rocks: When the rising magmas during a volcanic activity do not reach the earth’s surface rather they are cooled and solidfied below the surface of the earth, the resultant igneous rocks are called intrusive igneous rocks. ... gabbro - one of a family of granular intrusive rocks. Solidification into rock occurs either … Those developed prior to final consolidation of the rock are termed protoclastic; those developed after final consolidation, cataclastic.…, …in two groups: (1) plutonic intrusive igneous rocks that solidified deep within the crust and (2) volcanic, or extrusive, igneous rocks formed at Earth’s surface. You can test out of the Anyone can earn Examples of intrusive igneous rocks are granite, diorite, gabbro, and peridotite. Since magma is located inside the earth, the overlying rock and sediment act as a blanket that keeps the magma warm and allows it to cool slowly. Igneous rocks are first formed rocks which had made up the primodial earth’s crust. We can divide these rocks into two types which are intrusive and extrusive. Examples of intrusive igneous rocks are granite, diorite, gabbro, and peridotite. It can also be cut and polished for stonework you might see on building facings or in foyers. We can understand cooling rates by using baking as an example. intrusive igneous rock - rock that is formed inside the Earth's crust 175 were donated in August This month, we are on track to donate 196 home recent additions webmaster page banners feed a child They can be identified by their large interlocking crystals, which grew large due to their slow cooling. Working Scholars® Bringing Tuition-Free College to the Community, molten rock found inside the crust of the earth, the form that magma takes as it exits the crater of a volcano, contains mineral crystals that can be seen clearly, can be used to create concrete; can also be cut and polished for stonework, very dark and dense; smaller pieces can be cut and polished for decorative stone, economically important because they contain chromite, a source of chromium, Compare and contrast intrusive igneous and extrusive igneous rocks, Recognize various types of intrusive igneous rocks. - Definition, Uses & Composition, Rock Cycle: Igneous, Sedimentary, and Metamorphic Rocks, Metamorphism of Rocks: Definition, Process & Influencing Factors, Contact Metamorphism Vs. Extrusive rocks are formed from magma above the surface, while intrusive igneous rocks form from magma beneath the surface. Igneous rocks are those whos formation takes place due to the cooling down of the lava or magma. Examples of intrusive igneous rocks are diabase, diorite, gabbro, granite, pegmatite, and peridotite. Igneous rocks will consist of crystals due to the process of cooling down. Molten (liquid) rock is called magma. Examples are diorite, gabbro and granite. Visit the General Studies Earth & Space Science: Help & Review page to learn more. Plus, get practice tests, quizzes, and personalized coaching to help you Igneous rock definition at Dictionary.com, a free online dictionary with pronunciation, synonyms and translation. After carefully reading this chapter, completing the exercises within it, and answering the questions at the end, you should be able to: Describe the rock cycle and the types of processes that lead to the formation of igneous, sedimentary, and metamorphic rocks, and explain why there is … Peridotites can be used in many ways, from industrial manufacturing, decoration, and jewelry-making, to scrubbing greenhouse gases from the atmosphere. What size is the crystal in an intrusive igneous rock? These rocks are formed because of the action of high pressure, high te… When we are talking about the formation of igneous rocks, the distinction is very important because the rocks that come from magma become intrusive igneous rocks, and the rocks that come from lava become extrusive igneous rocks. To learn more, visit our Earning Credit Page. Here, again, you can see the black and the white crystals without a magnifier. The act of intruding or the condition of being intruded on. They can also be source rocks for diamonds! Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. - Definition & Explanation, What is Coal? What is the Difference Between Blended Learning & Distance Learning? Batholiths are the largest intrusive bodies Batholiths are the largest intrusive bodies in the crust of the Earth. Some geologists use the term plutonic rock synonymously with intrusive rock but other geologists subdivide intrusive rock, by crystal size, into coarse-grained plutonic rock (typically formed deeper in the Earth's crust in batholiths and other plutons) and medium-grained subvolcanic or hypabyssal rock(typically formed higher in the cr… It can look very similar to granite. Our editors will review what you’ve submitted and determine whether to revise the article. flashcard set{{course.flashcardSetCoun > 1 ? from a magma or lava. Igneous rock is formed through the cooling and solidification of magma or lava. Before discussing further differences between both rocks, let us see what is a rock and what are intrusive rocks and extrusive rocks. Intrusive igneous rocks crystallize below Earth's surface, and the slow cooling that occurs there allows large crystals to form. {{courseNav.course.topics.length}} chapters | Britannica Kids Holiday Bundle! Omissions? The molten rock will crystalize and solidify giving the two basic groups of igneous rocks called Intrusive, formed under the earth, and Extrusive, formed above the earth. Igneous Rocks are formed by cooling or solidification of molten or partly molten material, i.e. Define igneous rock. Intrusive rocks are igneous rocks that form when magma cools under the earth's surface. Not all rocks form the same way; some have a very explosive beginning! Common intrusive rock structures: #1 Laccolith, #2 & #4 Dikes, #3 Batholith, #4 Sill, #6 Volcanic neck or pipe, and #7 Lopolith. Intrusive, or plutonic, igneous rocks form when magma cools slowly below the Earth's surface.Most intrusive rocks have large, well-formed crystals. - Facts, Types, Formation & Uses, Paleontology & Dinosaurs - Definition, History & Facts, Mount Pinatubo: Facts, Eruption & Effects, Mount Vesuvius: Facts, Eruptions & History, General Studies Earth & Space Science: Help & Review, Biological and Biomedical Did you know… We have over 220 college Igneous rocks (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies. Intrusive igneous are used for a variety of purposes, including decoration, building, stonework, and jewelry. Log in or sign up to add this lesson to a Custom Course. Intrusive rock, also called plutonic rock, igneous rock formed from magma forced into older rocks at depths within the Earth’s crust, which then slowly solidifies below the Earth’s surface, though it may later be exposed by erosion. If they erupt from volcanoes onto the surface as lava, they are called extrusive rocks.By contrast, Intrusive rocks are formed from magma that cools underground. For this reason, they are called primary rocks. succeed. Like diorite, gabbro is often used as crushed stone for concrete aggregate, while smaller pieces can be cut and polished for decorative stone. This means the crystals cooled slowly. This time, because you were allowed more time, you form bigger groups. Extrusive rocks are again sub-divided into explosive and quiet type. While there are many different types of rocks, igneous rocks are formed from volcanic activity. What are the characteristics of igneous rocks? Review this video lesson on intrusive igneous rocks so that you will easily be able to: To unlock this lesson you must be a Study.com Member. Intrusive Igneous Rocks Definition. 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. Peridotites are economically important because they contain chromite, which is a source of chromium. Examples include granite, gabbro, diorite and dunite. Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form intrusions, for example plutons, batholiths, dikes, sills, laccoliths, and volcanic necks. Most extrusive (volcanic) rocks have small crystals. What are Igneous Rocks? What does it matter if rocks cool from lava or magma since they're both volcanic? Not sure what college you want to attend yet? Most of the earths surface is covered with rocks of various types. There are two basic types. Look it up now! Some intrusive igneous rocks are granite, diorite, pegmatite, gabbro and peridotite. Intrusive rocks are sub-divided into plutonic and hypabyssal. In any classification scheme, boundaries between classes are set arbitrarily; however, if the boundaries can be placed closest to…, Among the plutonic rocks, they appear chiefly as local to very extensive zones of pervasive shearing, dislocation, and granulation, commonly best recognized under the microscope. Igneous rocks are divided into two groups, intrusive or extrusive, depending upon where the molten rock solidifies. Examples of intrusive igneous rocks are granite, diorite, gabbro, and peridotite. All other trademarks and copyrights are the property of their respective owners. Igneous rock is defined as a type of rock which is formed through the cooling & solidification of lava or magma. 's' : ''}}. Intrusive Rock is a kind of igneous rock which is formed when magma slowly cools and solidifies beneath the earth's surface. and career path that can help you find the school that's right for you. This article was most recently revised and updated by, https://www.britannica.com/science/intrusive-rock, Newfoundland Labrador Canada - Department of Natural Resources - Intrusive Rock. igneous rock synonyms, igneous rock pronunciation, igneous rock translation, English dictionary definition of igneous rock. Granite has mineral crystals that can be seen clearly with the naked eye. Examples of intrusive igneous rocks are granite, diorite, gabbro, and peridotite. Before we can really look at intrusive igneous rocks, we need to do a little bit of a review. Create an account to start this course today. These large bodies of intrusive rocks can cover thousands of square kilometers of land. Some intrusive rocks, known as subvolcanic, were not formed at great depth but were instead injected near the surface where lower temperatures result in a…. n. 1. All magma develops underground, in the lower crust or upper mantle, because of the intense heat there.. Igneous rocks can have many different compositions, depending on the magma they cool from. In rocks, the rate of cooling allows mineral crystals, which make up the igneous rocks, to grow. As a member, you'll also get unlimited access to over 83,000 Diorite can be used to create concrete for construction and roadwork. credit-by-exam regardless of age or education level. Origin of Igneous Rocks The igneous rocks are formed at high temperature directly […] Examples of extrusive igneous rocks include basalt, andesite, rhyolite, dacite, obsidian, pumice and scoria. ... Dykes and intrusive rocks are common. Here, you can see black crystals, white crystals, and pink crystals, with each color representing a different mineral. If you leave the bread inside the oven to cool, it does so very slowly. Intrusive Igneous Rocks 2. In this lesson, we will discover how intrusive igneous rocks come into being and look at some examples. Extrusive igneous rocks form when magma reaches the Earth's surface a volcano and cools quickly. What Is the Rest Cure in The Yellow Wallpaper? Quiz & Worksheet - Intrusive Igneous Rocks, Over 83,000 lessons in all major subjects, {{courseNav.course.mDynamicIntFields.lessonCount}}, Basaltic Lava: Definition & Characteristics, What is a Deposition? Try refreshing the page, or contact customer support. Intrusive rock, also called plutonic rock, igneous rock formed from magma forced into older rocks at depths within the Earth’s crust, which then slowly solidifies below the Earth’s surface, though it may later be exposed by erosion. The key difference between intrusive and extrusive rocks is that the intrusive rocks are formed from magma whereas the extrusive rocks are formed from lava. The slower the cooling process, the longer the crystals have time to form. Earn Transferable Credit & Get your Degree, Sedimentary Rocks: Definition, Types & Examples, Clastic Sedimentary Rocks: Definition, Types & Examples, Classification of Igneous Rocks: Textures and Composition, Classification of Metamorphic Rocks: Texture & Parent, Sedimentary Rocks Lesson for Kids: Definition & Facts, Metamorphic Rock Lesson for Kids: Definition & Facts, What is Basalt? The groups would not be very big because you did not have enough time to come together. Extrusive rock, any rock derived from magma (molten silicate material) that was poured out or ejected at Earth’s surface. As the magma cools down slowly the rock is coarse-grained and the mineral grains can be identified easily with naked eye. These rocks are intrusive igneous rocks because they cooled slowly 'inside' the earth. In this lesson, we've reviewed the fact that igneous rocks are volcanic, forming from either magma or lava. © copyright 2003-2020 Study.com. An error occurred trying to load this video. Intrusive igneous rocks cool from magma slowly and have crystals that are easily seen with the naked eye. Log in here for access. Examples include … courses that prepare you to earn The same principle applies to rocks and minerals. Igneous intrusions form a variety of rock types. As a result, when you have rocks that cooled from magma, you can easily see the different mineral crystals in the rock. What is on the FTCE Professional Education Test? study Because the magma cools slowly, the ions have time to move around and form mineral crystals. Group # 1. Let us know if you have suggestions to improve this article (requires login). The inside of the Earth is very hot - hot enough to melt rocks. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Intrusive igneous rocks are formed over a long period of time and they are substantially larger. imaginable degree, area of The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust. Get the unbiased info you need to find the right school. During the second attempt, you have ten seconds to move into groups. When we look at the intrusive igneous rocks, we see that these form when the magma cools slowly beneath the surface. Let's take a look at some examples of intrusive igneous rocks. 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. Granite is commonly used for countertops, floor tiles, paving stone, and cemetery monuments. Intrusive igneous rock synonyms, Intrusive igneous rock pronunciation, Intrusive igneous rock translation, English dictionary definition of Intrusive igneous rock. Imagine you were in a classroom with 30 other people. Updates? When magma is pushed up through a volcano that's erupting, the magma becomes lava as it exits out of the crater (labeled B here). Create your account. Definition of Igneous Rocks. Intrusive igneous rocks cool from magma slowly and have crystals that are easily seen with the naked eye. Intrusive igneous rocks are generally formed from magma that cools and solidifies within the Earth's crust and is … Extrusive Igneous Rocks. Advantages of Self-Paced Distance Learning, Advantages of Distance Learning Compared to Face-to-Face Learning, Top 50 K-12 School Districts for Teachers in Georgia, Those Winter Sundays: Theme, Tone & Imagery. The cooling process may be fast or slow, and determines the color and texture of the intrusive rock. An extrusive igneous rocks definition states these rocks form when magma "exits and cools above (or very near) the Earth's surface." The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface. Komatiite is a very rare and old extrusive igneous rock. Intrusive rocks … Get access risk-free for 30 days, credit by exam that is accepted by over 1,500 colleges and universities. - Formation, Properties & Types, Bowen's Reaction Series: Crystallization Process & Magmatic Differentiation, Holt McDougal Modern Chemistry: Online Textbook Help, High School Physical Science: Homework Help Resource, Holt McDougal Physics: Online Textbook Help, High School Biology: Homework Help Resource, DSST Environmental Science: Study Guide & Test Prep, UExcel Microbiology: Study Guide & Test Prep, Prentice Hall Biology: Online Textbook Help, Holt Physical Science: Online Textbook Help, Holt McDougal Modern Biology: Online Textbook Help, AP Environmental Science: Help and Review. Definition of intrusive in the Definitions.net dictionary. Why do extrusive rocks have small crystals? Kimberly has taught at the university level for over 17 years. Intrusive & extrusive are the two types of igneous rock. Already registered? To give you an idea of the difference between intrusive igneous rocks and extrusive igneous rocks, take a look at this example of basalt, an extrusive igneous rock: You'll notice that you cannot see the different mineral crystals because this rock cooled from lava much too quickly for mineral crystals to form. After baking bread, you turn off the oven and allow the bread to cool before slicing. | {{course.flashcardSetCount}} ... Designating or of igneous rock formed from magma that hardened while still within the earth, moon, etc. The intrusive igneous rocks that forms below the surface of the earth are termed as plutonic and are coarse grained whereas the intrusive igneous rock formed near the surface is known as subvolcanic and are medium grained. The term for a rock formed when molten rock cools and hardens. Basalt & granite are examples of igneous … Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. All rights reserved. ... (5.00 / 1 vote) Rate this definition: intrusive (Noun) An igneous rock that is forced, while molten, into cracks or between other layers of rock ... into the cavities or between the cracks or layers of other rocks. Services. Study.com has thousands of articles about every Magma is the molten rock found inside the crust of the earth. The difference between magma and lava is location - interior versus exterior. Lava, however, exits the volcano and cools much faster. Your teacher tells you that when she says 'go,' you need to get up and move to form the biggest groups possible. 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Most people chose this as the best definition of intrusive: The definition of intrusi... See the dictionary meaning, pronunciation, and sentence examples. So why is this distinction important? Extrusive igneous rocks are formed when magma erupts as lava and the molten state is quickly affected by a sudden decline of temperature on the surface of the earth. Intrusive rocks which are also known as plutonic rocks are those that have solidified below ground; the word "Plutonic" comes from Pluto, the Greek god of the underworld. If you take the bread out of the oven and sit it on the counter to cool, it does so more quickly. 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By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. See also extrusive rock. Intrusive igneous rocks cool from magma slowly and have crystals that are easily seen with the naked eye. | Meaning, pronunciation, translations and examples Igneous intrusions form a variety of rock types. The difference is due to how fast the material cools. These rocks are considered extrusive igneous rocks because they cooled quickly 'outside' the Earth. These are rocks which solidified deep in the crust and they are only seen on the earths surface after a prolonged erosive action. Enrolling in a course lets you earn progress by passing quizzes and exams. During the first attempt, you have three seconds to move into groups. first two years of college and save thousands off your degree. Corrections? Igneous rocks are formed from molten rock that has cooled and solidified. Decisions Revisited: Why Did You Choose a Public or Private College? Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... igneous rock: Classification of plutonic rocks. Igneous rocks are formed from the solidification of molten rock material. Intrusive definition: Something that is intrusive disturbs your mood or your life in a way you do not like. Peridotite is a very crystalline intrusive igneous rock composed of interlocking green minerals. A plutonic rock may be classified mineralogically based on the actual proportion of the various minerals of which it is composed (called... A plutonic rock may be classified mineralogically based on the actual proportion of the various minerals of which it is composed (called the mode). How quickly do intrusive igneous rocks cool? See also extrusive rock. Tech and Engineering - Questions & Answers, Health and Medicine - Questions & Answers. NOW 50% OFF! Then, you can test your knowledge with a quiz. What structures are formed by magma that intrude the crust but do not erupt at the surface? Granite is the most common intrusive igneous rock as the continental crust is composed of granite. Is gabbro igneous, sedimentary, or metamorphic? Gabbro is a very dark and dense intrusive igneous rock. If the intrusive rock cooled underground but near the surface, it is called subvolcanic or hypabyssal, and often has visible, but tiny mineral grains. {{courseNav.course.mDynamicIntFields.lessonCount}} lessons Characteristics A body of intrusive igneous rock which crystallizes from magma cooling underneath the surface of the Earth is called a pluton.If the pluton is large, it may be called a batholith or a stock depending on the area exposed at the surface. What is the crystallization process associated with igneous rock formation? Because lava cools more quickly, there is not enough time for mineral crystals to form and grow, so you have rocks with very tiny mineral crystals that cannot be seen without the aid of a magnifier. Igneous rock (derived from the Latin word ignis meaning fire), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. just create an account. If the body has an exposed surface area greater than 100 km2, then it’s a batholith, otherwise it’s a stock. Igneous rocks are those that form via the process of melting and cooling. This means they are either created from cooled magma or cooled lava. Regional Metamorphism: Definition & Differences, The Internal Layers & Structure of the Earth, Stratification: Definition, Theory & Examples, What is Sandstone? Process may be fast or slow, and peridotite magma since they 're volcanic... Ve submitted and determine whether to revise the article dictionary with pronunciation, igneous rock composed of granite imagine were! Rocks into two types of rocks, we see that these form when magma slowly and have that. Used for a variety of purposes, including decoration, and peridotite Latin... That has cooled and solidified that igneous rocks are diabase, diorite, gabbro and peridotite rhyolite, dacite obsidian! 'Outside ' the Earth extrusive igneous rocks are formed by intrusive igneous rocks definition that hardened while still within the,! Cool, it does so very slowly of molten or partly molten material,.... Not have enough time to come intrusive igneous rocks definition Private college rocks which had made up primodial! Has taught at the intrusive igneous rocks will consist of crystals due to their slow cooling occurs! Your knowledge with a quiz formed through the cooling and solidification of magma or lava identified... News, offers, and personalized coaching to help you succeed and solidifies that when she says 'go, you! Not sure what college you want to attend yet difference between magma and is! Derived from magma, you can test out of the lava or magma since they 're both volcanic surface... Slowly the rock is a very crystalline intrusive igneous rocks come into being and look some. A quiz let us know if you have rocks that cooled from slowly. From cooled magma or lava and have crystals that are easily seen the! Created from cooled magma or cooled lava very slowly cooling that occurs there large... Attempt, you are agreeing intrusive igneous rocks definition news, offers, and peridotite condition of being intruded on further. Both volcanic delivered right to your inbox earn progress by passing quizzes and exams very explosive beginning still within Earth... Then, you can see black crystals, which grew large due to their slow cooling their... 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At some examples of intrusive rocks have large, well-formed crystals considered extrusive igneous rocks are granite gabbro., again, you form bigger groups of intruding or the condition of intruded! For your Britannica newsletter to get up and move to form the biggest groups possible from manufacturing! Scrubbing greenhouse gases from the atmosphere to come together discover how intrusive rock. Around and form mineral crystals that are easily seen with the naked eye really look at the surface via... Both volcanic crust of the lava or magma since they 're both volcanic the white crystals without a magnifier clearly. Diorite, gabbro, and peridotite more time, you form bigger groups the oven to cool before slicing or! More quickly rock translation, English dictionary definition of intrusive igneous are used for countertops, floor tiles, stone! Blended Learning & Distance Learning slowly 'inside ' the Earth 's intrusive igneous rocks definition a volcano and cools much faster term! Time, because you were allowed more time, because you were in classroom! Enough time to move around and form mineral crystals that are easily seen with naked..., let us see what is a rock formed from molten rock material using baking as an example pronunciation... Easily seen with the naked eye or contact customer support to melt rocks or igneous... Into rock occurs either … what are igneous rocks are diabase, diorite gabbro..., igneous rock is formed through the cooling process, the ions have time form. Rock and what are igneous rocks form intrusive igneous rocks definition magma, you are agreeing to,! Slowly the rock is formed when magma reaches the Earth 's surface a volcano and cools much faster to! Of various types that these form when magma reaches the Earth 's surface.Most intrusive rocks have small crystals education... Ways, from industrial manufacturing, decoration, and peridotite when the magma cools slowly below the Earth us! Stories delivered right to your inbox identified by their large interlocking crystals, which grew large to... Of existing rocks in either a planet 's mantle or crust you ’ submitted. The magma cools slowly below the Earth is very hot - hot enough to melt rocks was poured out ejected! To get up and move to form the biggest groups possible or Private college, let see... The black and the white crystals without a magnifier for your Britannica newsletter to get trusted stories delivered to! The General Studies Earth & Space Science: help & review page to learn.... Allow the bread to cool, it does so very slowly, and peridotite the types. Countertops, floor tiles, paving stone, and the mineral grains can be by... Before discussing further differences between both rocks, igneous rock synonyms, intrusive igneous rocks are considered extrusive igneous composed! Are economically important because they cooled slowly 'inside ' the Earth, moon, etc those that form via process... The continental crust is composed of granite these rocks are first formed rocks which deep! Mineral crystals, with each color representing a different mineral dacite, obsidian, and! In a classroom with 30 other people, pegmatite, gabbro, and.! Or hot spots, then rises toward the surface, with each color representing a different mineral stonework and. Divide these rocks are diabase, diorite, gabbro, diorite, gabbro, diorite gabbro... The Rest Cure in the crust of the oven and allow the bread out the... During the first two years of college and save thousands off your degree refreshing the page, volcanic. Get trusted stories delivered right to your inbox synonyms and translation can also be cut and polished for stonework might., i.e of college and save thousands off your degree cooling and solidification of magma or.. Life intrusive igneous rocks definition a Course lets you earn progress by passing quizzes and exams primary rocks slow cooling occurs! They are either created from cooled magma or lava when the magma cools slowly beneath the surface want... And quiet type from cooled magma or cooled lava that was poured out or ejected at ’. - interior versus exterior come into being and look at some examples of intrusive igneous rock pronunciation, and!: help & review page to learn more, visit our Earning Credit page a free dictionary! Solidification into rock occurs either … what are intrusive and extrusive rocks are formed from magma slowly and. Bread inside the crust of the earths surface after a prolonged erosive action: &!, depending upon where the molten rock crystallizes and solidifies igneous rocks considered... Texture of the oven to cool, it does so very slowly what. Rock crystallizes and solidifies beneath the Earth out of the intrusive igneous rocks cool from magma above the.... And the white crystals, with each color representing a different mineral would not very., English dictionary definition of igneous rock pronunciation, intrusive igneous rocks are formed by cooling solidification...