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slow cooling of gaseous magma
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What are veins of extremely coarse-grained igneous rocks called?
Veins of extremely coarse-grained igneous rocks are called pegmatites. These veins form from the crystallization of mineral-rich magma, resulting in very large crystals due to slow cooling and high water content. Pegmatites are commonly found in association with granitic rocks.
What are teardrop shaped bodies with large crystals such as gemstones that form when magma moves upward?
Teardrop-shaped bodies with large crystals, often referred to as "pegmatites," form when magma cools slowly, allowing large crystals, such as gemstones, to develop. These formations typically occur in the final stages of magma crystallization, where the temperature and pressure conditions create an environment conducive to the growth of sizable mineral crystals. Pegmatites are commonly found in granitic environments and can contain rare minerals and gemstones due to the concentration of elements during crystallization.
How do the crystals in pegmatites from?
Pegmatites are igneous rocks that form from the crystallization of magma that is rich in water and volatile components, leading to the growth of large crystals. The unique conditions during their formation result in the presence of rare minerals and elements, such as lithium, beryllium, and tantalum. These crystals often exhibit a distinct zonation, with more complex and larger crystals forming in the center of the pegmatite. The slow cooling process allows for the development of well-formed, often beautifully colored crystals, which are of significant interest to mineral collectors and the mining industry.
Are igneous rocks formed from smalll minerals?
Not necessarily. Intrusive igneous rocks, especially pegmatites, can have large crystals.
Mineral like topaz can form in these small teardrop shaped formation?
i think the answer is pegmatites or something... i just googled it myself your corect it is pegmatites
What are veins of extremely coarse grained igneous rocks called?
Veins of extremely coarse-grained igneous rocks are referred to as pegmatites. These veins are formed from the last minerals to crystallize in a cooling magma, resulting in very large crystals. Pegmatites can contain economically valuable minerals such as lithium, beryllium, and rare earth elements.
What are gemstones such as topaz that form in teardrop-shaped bodies called?
pegmatites
How are the ways in witch pluton and pegmatite minerals form similar?
Both plutons and pegmatites are formed from the slow cooling of molten rock beneath the Earth's surface. This slow cooling allows for the formation of large mineral crystals. Additionally, both plutons and pegmatites can contain a variety of minerals, often including rare or uncommon ones due to the unique conditions of their formation.
Why are exceptionally large mineral crystals found in pegmatite?
They are associated with the late stages of granite intrusions and the minerals formed in pegmatites literally had the time to enjoy the benefits of a slow crystallization process from a rich chemical stew produced by the cooling granite. For an alternate hypothesis, see the link below.
Can salts form crystals?
Yes. Salts can form crystals (salt crystals).
A mineral specimen very lage crystals where did it most likely form?
Mineral specimens with very large crystals most likely formed in environments with slow cooling rates and sufficient space for crystal growth, such as pegmatites or hydrothermal veins. These conditions allow for the growth of larger crystals due to reduced competition for space and slower precipitation rates.
What rock has larger crystals than basalt and granite?
A pegmatite is a rock formed under certain favorable circumstances that enhance the crystal size of the rock. The crystals would be larger than those in basalt, an extrusive igneous rock, and granite, and intrusive igneous rock.
