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They are hard, they are crystalline, they are generally non-stratified, and they do not contain fossils.

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13y ago

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Related Questions

When molten rocks cools what rocks form?

igneous rocks


What form's with physical properties with Extrisive?

Extrusive rocks are igneous rocks that form as a result of crystallization of magma at Earth surface


What are igneous rocks that form over the surface?

Rhyolititcen rocks.


What are a basic list of the physical properties of igneous rocks?

Some basic physical properties of igneous rocks include color, texture (such as grain size and shape), density, hardness, and composition (mineral content). Additionally, features like porosity, cleavage, fracture, and luster can help further describe and classify igneous rocks.


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.


Are igneous rocks made up of igneous rocks?

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


Why are igneous are called primary rocks?

Igneous rocks


Are volcanic rocks igneous rocks?

Yes. Volcanic rocks are extrusive igneous rocks.


Are sedimentary rocks are harder than igneous rocks?

No, igneous rocks are harder than sedimentary rocks on average.


How do fine- grained igneous rocks from?

extrusive igneous rocks =/


What kind of igneous rocks for on earths surface?

Some do. These are called extrusive igneous rocks. However a large portion of igneous rocks form beneath the surface. These are intrusive igneous rocks.


Are granite rocks igneous rocks?

Yes. More exactly, intrusive igneous rocks.