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Why don't crystals always form in extrusive rock?
In many cases the molten rock at the surface cools too quickly for crystals to form.
How do small crystals form?
Answer: Crystals usually form from molten rock as the molten rock gradually cools. If the molten rock cools very rapidly, then either small crystals form or no crystals form. An example of this is when lava is ejected from a volcano. If molten rock cools slowly, then large crystals can form. This happens usually when the molten material is very deep in the Earth. Examples of these types of crystals are diamonds, emeralds, rubies, etc.
What below the Earths's surface cools and hardens to form mineral crystals?
Molten magma cools and hardens to form mineral crystals.
Why does pumice have no crystal structure?
Pumice is made of glass. Glass forms when molten rock cools too quickly for crystals to form.
How does crystallization form?
crystals form from molten rock as the molten rock cools. if the molten rock cools very fast then you may have small crystals growing or no crystals at all. if the molten rockk colls slowly then you then you have large crystals growing. this happens when the molten material is deep in the earth. examples of these types of crystals are Rubies, Emeralds, and Diamonds. crystals may also form when water is evaporated. salt crystals are an example as they form when salt water evaporates.
Why don't crystals always form in extrusive rocks?
In some cases the molten rock cools too quickly for the atoms to arrange themselves into a crystalline structure.
What does lava that cools quickly form?
fast cooling lava -small crystals or no crystals
What lava that cools quickly form?
fast cooling lava -small crystals or no crystals
Can lava make glass?
Volcanic glass forms when molten material cools too quickly for crystals to form. The small size of volcanic ash particles ensures that the cool quickly.
When lava cools quickly large crystal form?
No. Small crystals form.
Melted rock that flows to the surface cools quickly forms?
Igneous rocks are formed when molten hot rock flows to the surface of the Earth and rapidly cools down. The crystals that form are rich in silicon and oxygen.
How do new mineral grow within existing rocks?
Crystals usually form from molten rock as the molten rock gradually cools.
