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The two types are extrusive igneous rock, which solidifies from magma on the surface, and intrusive igneous rock, which solidifies below the surface. Basalt is extrusive, granite is intrusive.

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15y ago
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11y ago

magma and hot molten lava

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Q: What are the sub categories of igneous rocks?
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Related questions

Can rocks both have igneous and intrusive?

Since igneous rocks are divided into two categories (intrusive and extrusive) an igneous rocks can be intrusive.


Is a sedimentary rock an igneous rock?

No. Igneous, sedimentary, and metamorphic rocks are three different categories of rock.


What are the three main categories into which geologists classify rocks?

Sedimentary, metamorphic and igneous.


What are the three categories that rocks are classified in?

Igneous, metamorphic and sedimentary are the three rock types.


When molten rocks cools what rocks form?

igneous 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.


3 main categories of rocks?

Igneous--those that form directly from a molten state. Sedimentary--those that form from eroded particles of various sizes from other rocks. Metamorphic--igneous and sedimentary rocks, and sometimes metamorphic rocks, that undergo a transformation from heat and/or pressure.


What are igneous rocks that form over the surface?

Rhyolititcen rocks.


Are igneous rocks made up of igneous rocks?

Sedimentary rock can be made up partially of igneous clasts, but igneous rock is igneous rock.


What do you call rocks that have been formed from the hot molten material within the earth's crust that has cooled and hardened?

Igneous rocks are formed by the solidification of molten materials.


Is volcanic rock only igneous?

Lava is, by preferred definition, a viscous fluid comprised of molten rock that has reached the surface. In this case, lava is not an igneous rock. However, 'lava' can also refer to the cooled and solidified product of the molten rock. In this case, lava is an igneous rock, formed from the solidification of molten lava.


Where are the two types of igneous rocks made?

Extrusive igneous rocks , Intrusive igneous rocks