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An acid igneous rock A always contains quartz B never contains quartz C would be mafic D b and c above?
Boort3537
The best anwser would be A, that they contain quartz.
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∙ 9y ago
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Is thecarnelian rock igneous metamorphic or sedimentary?
none of the above carnelian is a mineral that is a lot like quartz
Are agates metamorphic igneous or sedimentary?
Agates are none of the above rock types, but a form of the mineral quartz, normally formed as a gas vesicle filler in igneous rocks, the microcrystalline quartz gradually filling the cavity with successive layers.
Can igneous rock be formed above or below ground?
It is formed both- above ground (as extrusive igneous rocks) or below ground (as intrusive igneous rocks).
What is the diffrence between basalt and granite?
Basalt is the most common volcanic rock. It contains the minerals plagioclase and augite. It can come in black or dark gray and has a hardness of 6-7 on the MOHS scale. Its grains are fine. Granite is an intrusive rock. It contains feldspar, quartz and mica. It can come in black, gray, pink, red, or yellow. It has a hardness of 6 on the MOHS scale. Its grains are fine. Both, however, are igneous rocks.
What are igneous rocks that form above the earth called?
Extrusive (volcanic) igneous rocks.
Why do igneous rocks stick up above the ground?
Softer rock is originally around the igneous rock but the soft rock has eroded making the igneous rock visible and above ground level.
When molten rock undergoes crystallization above ground what type of rock results?
Extrusive igneous rock is the result of above ground crystallization.
What is the theory of igneous rock?
Igneous rock is formed from solidification of magma either above or below ground.
What igneous rocks cool above ground?
Etrusive igneous rocks such as pumice, basalt, andesite and rhyolite.
Where does Igneous rock form below or above?
Igneous rocks are formed from the cooling of lava/magma. (Lava is magma that has been moved from beneath the Earth's surface to above.) They can be formed above or below the Earth's surface- when formed above is called 'Extrusive Igneous rock' and when formed below is 'Intrusive Igneous rock'. When a rock is extrusive, it forms small crystals. When it is intrusive, it causes large crystals to form.
Is granite metamorphic or sedimentery?
none of the above. it is igneous
Igneous rocks that form the surface are intrusive.?
above
