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Intrusive or extrusive describe properties of an igneous rock. An intrusive rock is formed within the crust and it insulated and cooled slowly. Some examples of an intrusive rock include diorite, granite, gabbro, and periodite. They have large grains because they have more time for growth. On the other hand, extrusive rocks cool at the surface rapidly. They are comprised of tiny crystals and/or glass. Some examples include rhyolite, andesite, and basalt.

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Are magmas classified as intrusive and extrusive?

Yes, magmas can be classified as intrusive or extrusive. Intrusive magmas cool and solidify beneath the Earth's surface, forming intrusive igneous rocks like granite. Extrusive magmas erupt onto the Earth's surface and solidify quickly, forming extrusive igneous rocks like basalt.


Is hematite extrusive or intrusive?

Hematite is commonly found as a sedimentary mineral in deposits like banded iron formations. It is not typically associated with igneous rocks, so it is neither extrusive nor intrusive in the conventional sense.


Is feldspar extrusive or intrusive?

Feldspar can be found in both extrusive and intrusive igneous rocks. In extrusive rocks, feldspar forms when magma cools and solidifies quickly on the Earth's surface. In intrusive rocks, feldspar forms as magma cools and solidifies slowly beneath the Earth's surface.


Is talc intrusive or extrusive rock?

Talc is formed from the metamorphism of magnesium-rich rocks, such as serpentinite. It is classified as a metamorphic rock, which means it is formed under intense heat and pressure deep within the Earth's crust. Therefore, talc is considered an intrusive rock.


How does extrusive differ from intrusive?

Extrusive rocks form from lava cooling on the Earth's surface, leading to rapid cooling and fine-grained texture. Intrusive rocks form from magma cooling beneath the surface, resulting in slower cooling and coarse-grained texture. This difference in cooling rates gives extrusive rocks their characteristic fine-grained appearance and intrusive rocks their coarse-grained appearance.

Related Questions

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.


Igneous rocks can be classified into which 2 groups?

Intrusive and Extrusive.


Are magmas classified as intrusive and extrusive?

Yes, magmas can be classified as intrusive or extrusive. Intrusive magmas cool and solidify beneath the Earth's surface, forming intrusive igneous rocks like granite. Extrusive magmas erupt onto the Earth's surface and solidify quickly, forming extrusive igneous rocks like basalt.


How are intrusive classified?

Intrusive features are typically classified as plutonic rocks, especially inside of a volcano. Comparatively, extrusive features are also classified as volcanic rocks.


Can magmas be classified as intrusive or extrusive?

Yes, magmas can be classified as intrusive or extrusive. Intrusive magmas form underground as the magma cools slowly, resulting in large crystals. Extrusive magmas, on the other hand, cool quickly on the Earth's surface, leading to fine-grained or glassy textures like obsidian or basalt.


Is schist an intrusive or extrusive rock?

Neither, Igneous rock is either intrusive or extrusive. Thats what intrusive and extrusive is... A igneous rock.


Are crystals intrusive or extrusive?

extrusive


Is Plutonic intrusive or extrusive?

Intrusive


Is plutonic intrusive extrusive?

Intrusive


Is dacite intrusive or extrusive?

Dacite can be both intrusive and extrusive. Intrusive dacite forms when magma solidifies beneath the Earth's surface, while extrusive dacite forms when lava erupts on the Earth's surface and cools quickly.


Are fine crystals intrusive or extrusive?

extrusive


How igneous rock classified?

Geologists classify rocks by where they are formed; above ground or under ground