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False there classified as basaltic, andesitic and rhyolitic based on amount of silica.

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13y ago

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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.


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.


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.


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


Is basalt an intrusive rock or extrusive rock?

Extrusive. Solidifies above ground level.