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Granite is classified as a granitic rock, which means it is an intrusive igneous rock primarily composed of quartz, feldspar, and mica. Unlike basalt, which is a volcanic rock formed from the rapid cooling of lava, granite forms from the slow crystallization of magma beneath the Earth's surface. It is not andesitic or basaltic; those terms refer to different compositions and types of volcanic rocks.
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What kind of rocks make up continental crust and oceanic crust?
Continental crust is mainly composed of granitic rocks such as granite and rhyolite, which are light in color and less dense. Oceanic crust is primarily composed of basaltic rocks, specifically basalt, which are dark in color and more dense than granitic rocks.
Is continental crust made of rocks such as granite?
Yes, continental crust is primarily composed of granitic rocks such as granite. This type of rock is less dense than the basaltic rocks found in oceanic crust, which contributes to the higher elevation of continental landmasses.
Can granite form as a lava flow?
No, granite does not form as a lava flow. Granite forms deep underground from the slow cooling of magma. Lava flows are composed of different types of igneous rocks, such as basalt or andesite, that form at the Earth's surface during volcanic eruptions.
Are basaltic igneous rocks lower in density than granitic rocks?
Granite is very much less dense than basalt. This is why the continental crust (mostly composed of granite) floats on Oceanic crust (made mostly of basalt). Granite is 70 % silicon. Where basalt is mainly pyroxene.
Is it true or false that light-colored rocks with lower densities form from basaltic magma?
False. Light-colored rocks with lower densities, such as granite, typically form from granitic magma, which is more viscous and contains higher concentrations of silica. Basaltic magma, on the other hand, produces darker, denser rocks like basalt. Therefore, the statement is incorrect.
Which is volcanic lava rock basaltic or granitic?
The most common type of lava is basaltic. However some lavas may be andesitic or ryolitic. Rhyolite is the extrustive equivalent of granite.
What do basaltic and granitic magmas have in common?
Basalt and Granite are both made from the same magma.
How do scientists determine mantles is denser than the crust?
The mantle is composed of basaltic rock, the crust is composed mostly of granitic rock. Basalt is denser than Granite.
How does a Granite rock and a Gabbro rock differ from each other?
The counterpart of Granite is Rhyolite,the counterpart of Gabbro is Basalt. Gabbro is mafic(Dark coloured) ,Granite is felsic (light coloured) Granite forms from magma of Granitic composition while Gabbro forms from magma of Basaltic composition.
What kind of rocks make up continental crust and oceanic crust?
Continental crust is mainly composed of granitic rocks such as granite and rhyolite, which are light in color and less dense. Oceanic crust is primarily composed of basaltic rocks, specifically basalt, which are dark in color and more dense than granitic rocks.
Is continental crust made of rocks such as granite?
Yes, continental crust is primarily composed of granitic rocks such as granite. This type of rock is less dense than the basaltic rocks found in oceanic crust, which contributes to the higher elevation of continental landmasses.
What is the difference between granitic igneous rocks and basaltic igneous rocks?
Basalt is an igneous rock with very fine grains. It is dark colored. Granite is a variety of colors: gray, pink, and white. It has coarse grains.
Can granite form as a lava flow?
No, granite does not form as a lava flow. Granite forms deep underground from the slow cooling of magma. Lava flows are composed of different types of igneous rocks, such as basalt or andesite, that form at the Earth's surface during volcanic eruptions.
What does it mean to have andesitic composition?
Having an andesitic composition means that a rock or magma contains a combination of minerals such as plagioclase feldspar, amphibole, and biotite, and has an intermediate silica content compared to other types of volcanic rocks. Andesitic compositions are commonly associated with subduction zones and are characterized by their moderate viscosity and tendency to erupt explosively.
What would happen if basalt and granite collided?
If basalt and granite collided, the basalt being denser and more malleable might override the granite, causing the granite to deform or break under pressure. The result would likely be a mixed rock formation with basaltic and granitic features, depending on the extent of the collision and subsequent geological processes.
Is syenite granitic?
Syenite is not granitic. Quartz is one of the main minerals found in granitic rock. Syenite contains little or no quartz, but otherwise has the same general composition as granite.
What is granitic magma?
Granitic magma is a type of magma that has a high silica content, which makes it very viscous and prone to forming large plutonic rock bodies, such as granite. It is typically generated in volcanic arcs above subduction zones and is associated with explosive volcanic eruptions due to its high viscosity.
