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Why is pegmatite igneous?
Pegmatite is classified as an igneous rock because it forms from the cooling and solidification of molten material, typically within the Earth's crust. Pegmatite is characterized by its large crystal size, which indicates that it cooled slowly, allowing the minerals to grow to a significant size.
What is the igneous rock that cooled too quickly for a crystal structure to form?
Volcanic glass or obsidian is a quickly cooled igneous rock without a mineral crystal structure.
Where are the two types of igneous rocks made?
Intrusive igneous rocks are formed beneath the Earth's surface through the slow cooling of magma, leading to larger crystal sizes. Extrusive igneous rocks are formed at the Earth's surface through the rapid cooling of lava, resulting in smaller crystal sizes.
What makes igneous rocks have different Crystal sizes?
The cooling rate of magma/lava determines the crystal size in igneous rocks. Fast cooling results in small crystals or glassy texture (e.g., obsidian), while slow cooling leads to large crystals (e.g., granite). Factors like depth of magma intrusion, presence of water, and pressure can also influence crystal size.
One magma can produce several different igneous rocks having different mineral compositions?
Yes, a single magma chamber can produce different types of igneous rocks due to variations in cooling rates, pressure, and mineral content within the chamber. As the magma cools and crystallizes, different minerals may form at different times and temperatures, resulting in the formation of diverse igneous rocks with varying mineral compositions.
The igneous rock texture characterized by two distinctly different crystal sizes is the texture?
Porphyritic
Is crystal an igneous rock?
yes
Why is pegmatite igneous?
Pegmatite is classified as an igneous rock because it forms from the cooling and solidification of molten material, typically within the Earth's crust. Pegmatite is characterized by its large crystal size, which indicates that it cooled slowly, allowing the minerals to grow to a significant size.
The crystal the size of an igneous rock is described as its what?
texture
What is The crystal size of an igneous rock is described as?
texture
What is the difference in crystal growth between intrusive and extrusive igneous rock?
The crystal growth of intrusive igneous is substantially more so than extrusive igneous. Magma cools quicker on the earth's surface, extrusive igneous formed, as opposed to below the crust, intrusive. Therefore the longer it takes to cool the magma, the more the crystal growth.
What is a xenocryst?
A xenocryst is a crystal which does not occur in a specific igneous rock.
Where would you find igneous rock with the smallest crystal?
at home
What is the igneous rock that cooled too quickly for a crystal structure to form?
Volcanic glass or obsidian is a quickly cooled igneous rock without a mineral crystal structure.
Where are the two types of igneous rocks made?
Intrusive igneous rocks are formed beneath the Earth's surface through the slow cooling of magma, leading to larger crystal sizes. Extrusive igneous rocks are formed at the Earth's surface through the rapid cooling of lava, resulting in smaller crystal sizes.
Is the crystal in igneous rock small if it cools quickly from magma?
yes
What is the crystal size for extrusive igneous rocks?
Fine grained
