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Is fluorite and intrusive rock or a extrusive rock?

Fluorite is a mineral, not a type of rock. It is commonly associated with extrusive igneous rocks like rhyolite and granite.


Is andesite a mineral?

No. Andesite is an extrusive igneous rock.


What material does extrusive rock form?

Extrusive rock forms from cooling lava.


Is peridot an intrusive or extrusive igneous rock?

Peridot is olivine, which is a mineral, not a rock. It is found in both intrusive and extrusive rocks.


From what material does an extrusive rock form?

Extrusive rocks form from lava that cools and solidifies quickly on the Earth's surface, such as basalt or rhyolite.


Extrusive igneous rocks form when hardens and cools.?

Extrusive igneous rocks form when magma erupts onto the Earth's surface and cools quickly, resulting in small mineral grains. This rapid cooling prevents the growth of larger mineral crystals. Examples of extrusive igneous rocks include basalt and rhyolite.


A rock that cools very quickly so that few or no mineral grains form is?

You can describe the rock by the process that allowed it to cool quickly: "Extrusive" or you can describe it by its texture: "aphanitic". An extrusive rock tends to be aphanitic = Rocks formed from lava flows tend to have small crystals.


From what material does extrusive rocks form?

Extrusive rock forms from cooling lava.


Is obsidian intrusive or extrusive?

quartz itself, but you will find fragments of quartz of all sizes in both sedimentary and metamorphic rocks.


Lava cools to form?

Extrusive igneous rock.


How does the Igneous rock form from the extrusive?

Extrusive volcanics form when magma travels and cools upon reaching Earth's surface.


Does an Extrusive Rock cool slowly?

No, extrusive rocks cool quickly because they form on the Earth's surface or in shallow depths where the temperature is lower. This rapid cooling results in small mineral crystals or a glassy texture in the rock.