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The cooling rate of the rock.

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Q: What determines the mineral grain size in an igneous rock?
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Related questions

What size of rock texture refers to igneous rock?

The size of the mineral crystals in an igneous rock determines the rock's texture.


Dark course grain intrusive igneous rock simliar to basalt and mineral make up?

Gabbro.


Does igneous rock texture refers to size?

please anyone else can answer this question I'm in hurry pls.


What determines the grain shape of a rock such as conglomerate?

The mineral composition of the conglomerate determines the grain shape as well the the type of weathering or erosive elements (wind, water, chemicals) that the rock is is exposed to because grain shape is heavily dependent upon whether the rock has been subjected to erosion or not.


Is a igneous rock a mineral or rock?

You say it as ' Igneous ROCK ' and ask whether it is a rock..


How can the mineral quartz be an igneous rock?

Quartz is a rock-forming mineral--and can be found in all three rock types. There is no igneous rock formation that is exclusively composed of the mineral quartz.


Is a pumice rock a rock or a mineral?

Pumice is an extrusive igneous rock, not a mineral.


Is cyanotrichite an igneous rock?

No, it is a mineral.


Is Cinnabar a igneous rock?

An* And no. Cinnabar is a mineral, not a rock.


Is cobalt mineral igneous rock sedimentary rock or metamorphic rocks?

Cobalt is a mineral, not a rock.


What igneous rock has crystals that are not visible?

Extrusive igneous rock consists of mineral crystals that are not observable with the naked eye. Obsidian is an extrusive igneous rock (volcanic glass) where there technically are no mineral crystals.


What determines the texture of an igneous rock'?

the rate the melted rock cools