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Small crystal grains form when molten rock cools quickly. In an extrusive igneous rock, it's referred to as aphanitic texture.

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Type or crystal grain that form when molten rock cools quickly?

Fine crystal grain.


Crystal grain that forms when molten rock cools quickly?

Fine


What is a 4 letter word for a type of crystal grain that forms when molten rock cools quickly?

lava


What type of crystal grain is formed when molten rock cools slowly?

Large crystals with a coarse crystal grain texture.


What is the type of crystal grain that forms when molten rock cools quickly?

Small crystal grains form from rapid cooling of magma resulting in an aphanitic rock texture.


What is a type of crystal grain which is formed when molten rock cools slowly?

It is mineral


What type of crystal grain forms when molten rock cools quickly?

When molten rock cools quickly, fine-grained crystals form. This happens because there is not enough time for larger crystals to grow before the rock solidifies, resulting in smaller crystals being formed.


What is the name of the crystal grain that is formed when molten rock cools slowly?

The texture of the rock product of slow cooling magma is referred to as coarse grained.


What type of crystals grain that forms when molten rock cools slowly?

Quartz


What is a type of crystal grain that forms when rock cools Slowly?

When molten rock cools slowly, it will have a lot of time to form crystals, so the crystal size will be quite big. Take granite, for example. With the naked eye, you can see the individual crystals. The grain size is quite large. The kind of mineral that forms is dependent on the composition of the magma.


What type of crystal grain forms when magma cools slowly?

the crystals are large


Type of crystal grain that forms when molten rocks cool slowly?

Visible or coarse.