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Contrast the ways in which extrusive and intrusive rocks are formed?
Wiki User
∙ 13y ago
Intrusive rocks form within the crust of the Earth while extrusive rocks form on the surface.
Wiki User
∙ 13y ago
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What are the 2 kinda of igneous rock?
Extrusive and Intrusive. Extrusive rocks are formed from hardened lava at the surface and Intrusive rocks are formed from magma within the Earth.
How do intrusive and igneous rocks differ?
Intrusive rocks are formed from magma below the surface; extrusive rocks are formed from magma on the surface of Earth.
What is the different between extrusive and intrusive rocks?
Intrusive: An intrusive igneous rock is formed from magma undergroundExtrusive: An extrusive igneous rock is formed from lava outside of the volcano.
What are extrusive rocks and intrusive rocks?
Extrusive rocks are formed outside of earths surface. Intrusive rocks are formed inside earths surface.
Is Slate extrusive or intrusive?
Slate is metamorphic. Extrusive and intrusive are terms used to describe igneous rocks formed at ground level or underground.
What are the main two types of igneous rocks?
Igneous rocks are classified as either extrusive or intrusive. Extrusive rocks form from lava at or above the ground, and intrusive rocks form from magma below the ground. Granite is intrusive, pumice is extrusive.
Would you list intrusive rocks under rocks that form above the ground or below?
Intrusive rocks are Igneous rocks that have been formed underground. Igneous rocks are formed by the cooling of lava/magma. Igneous rocks are divided into two categories- intrusive and extrusive. Intrusive is when the magma cools slowly beneath the Earth's surface, which causes large crystals to form. When lava cools above the Earth's surface, it is called extrusive. Extrusive rocks have smaller crystals compared to intrusive, the difference always being noticable.
What is the difference between a intrusive igneous rock ad an extrusive rock?
instrusive is inside the valcano and exstrusive comes onto earth's crust
Why it would be easier for geologists to study extrusive igneous rocks than intrusive igneous rocks?
Since extrusive rocks are formed by lava (not magma), the rocks can be found easier because they are on the surface, whereas intrusive rocks are formed underground so they are either harder to get to or they are found in smaller quantities.
What do intrusive rock have in common with extrusive rocks?
Sedimentary rocks are not classified by the terms intrusive or extrusive. These are terms used specifically for igneous rock classification, referring to rock that has formed from melt either below or on the surface.
How do intrusiver rocks form?
intrusive rocks are formed within the earths surface from magma. extrusive rocks are formed from lava outside of earths surface
What igneous rocks are both intrusive and extrusive?
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
