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Chemical composition. Especially when Basic\Mafic.
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∙ 12y ago
Igneous rocks get darker as a result of higher concentrations of dark minerals like mafic minerals (e.g., biotite, amphibole, pyroxene) and higher levels of iron and magnesium. These minerals are more abundant in mafic igneous rocks, leading to their darker coloration compared to felsic igneous rocks, which have lower levels of these dark minerals. Heat also plays a role in darkening certain minerals through processes like metamorphism.
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In general how does the density of a light colored igneous rock differ from that of a dark colored igneous rock?
Light-coloured igneous rocks, such as granite, have a higher silica content and lower iron and magnesium than darker ones, such as basalt. Since iron and magnesium are very dense minerals, this makes darker igneous rocks more dense than lighter ones.
Light colored igneous rocks are less what than dark igneous rocks?
Dense. Light colored igneous rocks have lower density compared to dark colored igneous rocks due to their higher silica content, which results in slower cooling and the formation of larger crystals.
What are igneous rocks that form over the surface?
Rhyolititcen rocks.
What do you call rocks that have been formed from the hot molten material within the earth's crust that has cooled and hardened?
Igneous rocks are formed by the solidification of molten materials.
Are igneous rocks made up of igneous rocks?
No, igneous rocks are formed from the cooling and solidification of magma or lava. They are not made up of pre-existing igneous rocks.
In general how does the density of a light colored igneous rock differ from that of a dark colored igneous rock?
Light-coloured igneous rocks, such as granite, have a higher silica content and lower iron and magnesium than darker ones, such as basalt. Since iron and magnesium are very dense minerals, this makes darker igneous rocks more dense than lighter ones.
Light colored igneous rocks are less what than dark igneous rocks?
Dense. Light colored igneous rocks have lower density compared to dark colored igneous rocks due to their higher silica content, which results in slower cooling and the formation of larger crystals.
What causes igneous rocks to become magma?
Cooling to a solid.
When molten rocks cools what rocks form?
igneous rocks
What causes sedimentary or igneous rocks to turn into metamorphic rock?
Heat and Pressure.
Which types of rocks are not metamorphic rocks?
Sedimentary and Igneous rocks are not metamorphic rocks. Metamorphic rocks however are igneous or sedimentary rocks that have undertaken metamorphism (In extreme heat and/or pressure the minerals are forced to recrystalize) and become metamorphic rocks. If the heat/pressure causes the rock to melt into liquid rock than it is no longer metamorphi, it is igneous. Hope this helps :)
What are igneous rocks that form over the surface?
Rhyolititcen rocks.
What is the difference of igneous rocks and metamorphic rocks?
lava and/or magma cools and forms igneous rocks. igneous rocks go through weather and erosion which forms sediments. these sediments are collected and compacted. this causes sedimentary rocks. the sedimentary rocks go through weather and erosion as well as being exposed to heat and pressure. this causes metamorphic rocks. metamorphic rocks go through heat and pressure and then they melt and become lava or magma again. this is called the rock cycle.
What do you call rocks that have been formed from the hot molten material within the earth's crust that has cooled and hardened?
Igneous rocks are formed by the solidification of molten materials.
Are igneous rocks made up of igneous rocks?
No, igneous rocks are formed from the cooling and solidification of magma or lava. They are not made up of pre-existing igneous rocks.
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.
Why don't igneous rocks look like magma rocks if igneous rock is formed from magma?
Because that is the very definition of igneous rock.
