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What is the main difference between andesite and diorite?
Both are igneous rocks of intermediate coposition.
Are all rocks either mafic or felsic?
No. First of all, the terms mafic and felsic generally only apply to igneous rock. even among igneous rocks, mafic and felsic are just ranges on a "spectrum" of composition. Other classifications and examples include ultramafic (peridotite), intermediate (andesite), and intermediate-felsic (dacite).
What is in the formation of igneous rocks but not in formation of metamorphic rocks?
igneous rocks form within earths surface
Do we have igneous rock in Nigeria?
No we do not have igneous rocks in Nigeria because there are no volcanoes in Nigeria and it is lava or magma that make igneous rocks.
How are minerals arranged in igneous rocks?
Most igneous rocks have a relatively homogenous mix of minerals which are interlocked.
What is intermediate igneous rocks?
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What are intermediate materials in a rock cycle?
In the Rock Cycle : The Rocks are- Sedimentary Rocks, Igneous and Metamorphic Rocks. The Intermediate Materials are- Sediments and Magma
What is the main difference between andesite and diorite?
Both are igneous rocks of intermediate coposition.
Where do we find intermediate rocks?
Intermediate rocks contain roughly equal amounts of dark- and light-colored minerals. Igneous rock containing 56-65 percent silica.
How do you classify igneous rocks from other types of rock?
Igneous rocks are identified by first looking at the color index. Felsic igneous rocks contain mostly potassium feldspar. Intermediate igneous rocks contain mostly plagioclase feldspar. Mafic igneous rocks contain pyroxene, olivine, and plagioclase feldspar. Ultra mafic igneous rocks contain mostly olivine. Then igneous rocks are identified based on texture. For example, the texture of igneous rocks can be aphanitic, pegmatitic, phaneritic, glassy, vesicular, etc.
What kind of igneous rocks that are composed of an amphibole and intermediate plagioclase?
Granite and diorite contain both.
Is augite a igneous mineral?
Augite is a type of pyroxene. It is a common mafic-intermediate igneous mineral, but can also be found in some metamorphic rocks.
What two methods are used to group igneous rocks?
Igneous rocks can be either intrusive or extrusive, based on their location upon solidification from magma. Igneous rocks can also be grouped by chemistry and mineral content as felsic, intermediate, or mafic, mainly on the abundance of silicate minerals that are present.
When molten rocks cools what rocks form?
igneous rocks
What are andesite rhyolite and trachyte all a type of?
They are all extrusive igneous (i.e. volcanic) rocks of intermediate to felsic composition.
What type of rock always forms directly from another rock?
Metamorphic. By contrast, igneous rocks form from lava or magma, and sedimentary rock form from sediment. Those things are formed from previous rocks, but constitute intermediate stages: igneous and sedimentary rocks are formed indirectly from previous rocks.
How are light colored igneous rocks different?
Igneous rocks are divided into four groups based on their composition (often determined by observing density and color).Felsic (also called Silicic) igneous rocks have a lower density, and are generally lighter in color (white, tan, pink). They have a higher silica content and a lower iron and magnesium content than the other types of rock. Granite and rhyolite are felsic igneous rocks.Intermediate igneous rocks have a density between felsic and mafic rocks. They have a high silica content and a medium iron and magnesium content. These rocks are usually gray or a similar, medium-toned color. Andesite and diorite are intermediate igneous rocks.Mafic igneous rocks are quite dense, and have a much higher iron and magnesium content than felsic or intermediate igneous rocks. Mafic rocks are usually black or blackish. Gabbro and basalt are mafic igneous rocks.Ultramafic igneous rocks are the densest type, and have the highest iron and magnesium content. Ultramafic rocks are usually (surprise!) green. Peridotite is an ultramafic igneous rock.
