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Explain pegmatite is coarse grained with large crystals basalt is fine grained with small crystals and obsidian has no crystals?
Crystal size in these rock types is determined by their rate of cooling. Pegmatites have large crystals due to very slow cooling. Obsidian has microscopic crystals due to almost instantaneous cooling.
What factor determines if an igneous rock has no crystals small crystals or large crystals?
it depends on the heat, if it cool very quick then it has small crystals but if it cool very slowly than it is bigger the slower the cooling period the bigger the crystals
What is th size grain of metamorphic rocks?
It varies some metamorphic rocks are fine grained (eg slate) and others have very large crystals (eg an augen gneiss).
Do intrusive rocks have fine grains small crystals or large crystals?
No, because intrusive rocks form underneath the earth and cool very slowly which causes larger minerals and extrusive rocks form above the ground which cool very rapidly which causes very small minerals. so i hope you get it. Now I'm done.
What texture extremely rapid cooling of lava in which no crystals form?
super fine grained rock
What is does des res mean?
British usage- a very desirable residence.British usage- a very desirable residence.British usage- a very desirable residence.British usage- a very desirable residence.
What is the difference between coarse-grained and fine-grained?
Fine grained has larger crystals and coarse grained has smaller crystals
What is the difference between fine-grained and coarse-grained?
Fine grained has larger crystals and coarse grained has smaller crystals
What changes can you make to potassium chloride to make it dissolve faster in water?
You could grind it into very fine crystals.
What is the textural difference between coarse-grained phaneritic and fine-grained aphaneritic rocks?
Coarse grained textured rocks (phaneritic) have very large crystals because the magma, from which they are created, cools very slowly. Fine grained rocks (aphaneritic) have small crystals because the lava, from which they are created, cools down very quickly.
Explain pegmatite is coarse grained with large crystals basalt is fine grained with small crystals and obsidian has no crystals?
Crystal size in these rock types is determined by their rate of cooling. Pegmatites have large crystals due to very slow cooling. Obsidian has microscopic crystals due to almost instantaneous cooling.
Are fine crystals intrusive or extrusive?
extrusive
What is the difference between fine and coarse grained igneous rock?
Coarse grained textured rocks (phaneritic) have very large crystals because the magma, from which they are created, cools very slowly. Fine grained rocks (aphaneritic) have small crystals because the lava, from which they are created, cools down very quickly.
Is salt white?
Because it doesn't absorb any visible light.
A matrix of fine crystals surrounding phenocrysts?
Groundmass
How rare is jarosite?
Rarity is relative. My experience and a quick perusal of mindat.org would suggest that jarosite is not very rare. (There are many hundreds of localities, and fine micro crystals can be easily purchased for a few bucks.) However, jarosite is indeed rare in large crystals or fine specimens of display quality.
Can you make a sentence of desirable?
He thought his new date was very desirable.
