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Different igneous rocks have different crystal sizes because they have cooled at different rates. Those with larger crystals have cooled at a slower rate.
A single rock sample can have varying crystal sizes because there are different minerals within it. It is consistently the Quartz crystals in Granite which cool fastest, leaving less space for the Mica, which forms later. This means that the Quartz crystals are larger than others in the rock, resulting in an inconsistency in size.
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoIgneous rocks are formed when hot molten lava solidifies into rocks. When the magma is near the earth's surface it cools very quickly and the crystals do not have a long time to grow and are small in size.
If the magma is deep inside the earth's surface then it takes a long time to cool and the crystals have a long time to grow and are very big in size.
Wiki User
∙ 12y agoThe size depends on how long it has had to cool
Wiki User
∙ 13y agoCrystals
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∙ 12y agocrystals
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Igneous rocks can look very different depending on?
Igneous rocks look different depending on how fast the magma cools.
Consisting of layers of different minerals?
igneous rocks
What this different between acid igneous rock and basic igneous rock?
Acidic Rocks are those that have silica content. Basic rocks are ricj and iron and magnesium
What kind of formations are created when lava cools and hardens?
Igneous Rocks are formed. Obsidian is a volcanic glass, go to wikepidiea and search "list of rocks" and it will come up with all the different igneous, metamorphic, and sedimentary rocks and what they are.
What different types of rock are there?
There are three (3) different types of rocks, igneous, sedimentary and metamorphic rocks
Why do igneous rocks that have the same composition sometimes have different sizes of mineral grains?
This is as a result of difference in the rate of cooling of the Igneous rocks.
Igneous rocks can look very different depending on?
Igneous rocks look different depending on how fast the magma cools.
How are metamorphic rocks igneous rock and sedimentary rocks different?
Metamorphic rocks originate as igneous and sedimentary rocks, but have been changed by heat and pressure.
How can igneous rocks be different densities?
Igneous rocks vary greatly in composition and method of formation, resulting in diverse densities.
How many types of rocks?
There are lots of different types of rocks in the world.
When molten rocks cools what rocks form?
igneous rocks
How do igneous rocks form into metamorphic and sedimentary rocks?
Igneous-sedimentary weathering/erosion Igneous-Metamorphic high pressure and heat
What is one way igneous sedimentary and metamorphic rocks are different?
igneous rocks are made of lava that cools and hardens and metamorphic rocks are madeby heat and pressure.
Consisting of layers of different minerals?
igneous rocks
What this different between acid igneous rock and basic igneous rock?
Acidic Rocks are those that have silica content. Basic rocks are ricj and iron and magnesium
What different types of rock are there?
There are three (3) different types of rocks, igneous, sedimentary and metamorphic rocks
What kind of formations are created when lava cools and hardens?
Igneous Rocks are formed. Obsidian is a volcanic glass, go to wikepidiea and search "list of rocks" and it will come up with all the different igneous, metamorphic, and sedimentary rocks and what they are.
