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How is the size of mineral crystals in igneous rock related to the rate at which they cool?
When igneous rocks cool quickly, they have small crystals and have a texture that may be described as aphanitic. When igneous rocks cool slowly, they have much larger crystals and have a texture that may be described as phaneritic or pegmatitic.
How does the crystal sizes of igneous rocks indicate the rate of cooling and whether the rock is extrusive or intrusive?
Generally, large crystals represent slow cooling rates and small crystals represent fast cooling rates. Crystals need time to form and since extrusive rocks cool very quickly, they have very tiny crystals and some don't even have crystals because the rate of cooling was so fast that crystals didn't have time to nucleate. On the other hand, intrusive rocks cool rather slowly allowing crystals to grow.
What is a dark fine grained rock called?
A dark fine-grained rock is typically referred to as basalt. It is an igneous rock that forms from the rapid cooling of lava at or near the Earth's surface. Basalt is often dark in color due to its high iron and magnesium content.
Would mica be consider a rock?
Mica is not considered a rock; it is a mineral that is commonly found in rocks. Mica is a group of silicate minerals that are known for their perfect cleavage, flexibility, and ability to split into thin sheets.
Are crystals minerals?
Both. Rocks are made of minerals.
How is the size of mineral crystals in igneous rock related to the rate at which they cool?
When igneous rocks cool quickly, they have small crystals and have a texture that may be described as aphanitic. When igneous rocks cool slowly, they have much larger crystals and have a texture that may be described as phaneritic or pegmatitic.
How is the size of crystals in an igneous rock related to the formation of a rock?
If an igneous rock is formed from slowly cooling magma under the ground, it has more time to form crystals and so the crystals it forms are much larger than igneous rock formed from more quickly cooling magma or lava.
What does an igneous rock's crystal grain size indicate to the observer?
The size of the mineral crystals in an igneous rock is related to the rate of time spent in cooling from magma. Longer exposure to the crystallization temperature means larger crystals. Less time means smaller crystals, or in the case of obsidian, which cools extremely quickly, no crystallization.
How does the crystal sizes of igneous rocks indicate the rate of cooling and whether the rock is extrusive or intrusive?
Generally, large crystals represent slow cooling rates and small crystals represent fast cooling rates. Crystals need time to form and since extrusive rocks cool very quickly, they have very tiny crystals and some don't even have crystals because the rate of cooling was so fast that crystals didn't have time to nucleate. On the other hand, intrusive rocks cool rather slowly allowing crystals to grow.
How is the texture of an igneous rock related to the rate which it cooled?
Quick cooling of magma results in small crystal formation. Slow cooling magma results in larger crystals.
What is related words for igneous?
another word for igneous is fire.
What is a dark fine grained rock called?
A dark fine-grained rock is typically referred to as basalt. It is an igneous rock that forms from the rapid cooling of lava at or near the Earth's surface. Basalt is often dark in color due to its high iron and magnesium content.
Would mica be consider a rock?
Mica is not considered a rock; it is a mineral that is commonly found in rocks. Mica is a group of silicate minerals that are known for their perfect cleavage, flexibility, and ability to split into thin sheets.
How is magma and igneous rocks related?
Magma is molten rock, and igneous rock is cooled magma.
Is diamond an igneous or sedimentary rock?
Igneous, it is brought to the surface as an igneous Xenolith. The diamond crystal itself is of metamorphic origin it is metamorphosed carbon. It is more closely related to igneous rocks, as diamond forms in magma under very high temperatures and pressures, where there is no appreciable oxygen to burn the carbon. Artificial diamonds can be "grown" in a similar way by accumulating individual carbon crystals from a hot plasma (gas), in a process called chemical vapor deposition.
Is a igneous rock related to granite?
Yes, granite is a type of igneous rock. Igneous rocks are formed from the cooling and solidification of magma or lava, and granite specifically is a coarse-grained igneous rock composed mainly of quartz, feldspar, and mica minerals.
Is rice a mineral?
Rice is the seed of a monocot plant.For the source and more detailed information concerning your request, click on the related links section (Wikipedia) indicated directly below this answer section.
