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How is andesite different from rhyolite and basalt?
There are rocks that are extrusive (formed quickly on the surface of the earth) or intrusive (formed within the earth under slow cooling). Both types of extrusive or intrusive rocks can vary in composition from mafic (high iron and magnesium content) to silicic (less heavy ions like Fe and Mg, but with more of the lighter elements like Ca, Na, K, etc.). Extrusive rocks range from most mafic to less mafic as such: Basalt, Andesite, Rhyolite (and are all fine-grained b/c they cooled quickly). Intrusive rocks that cool more slowly and have larger crystals range from most mafic to less mafic as such: Gabbro, Diorite, Granite. Basalt and gabbro have a similar composition, just the crystal size differs from different cooling rates (same for rhyolite and granite).
Is basalt an example of a felsic rock?
No, basalt is not an example of a felsic rock. Basalt is an example of a mafic rock, which is rich in iron and magnesium and typically dark in color. Felsic rocks, on the other hand, are rich in silica and aluminum and are lighter in color.
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.
What do granite and basalt in common?
They are both lithospheric igneous rocks formed by the cooling and solidification of magma/lava and both of them contains silicon.
What color is rhyolite?
Rhyolite can be white, light gray, or pink.
Which has a lighter color rhiolite or basalt?
rhyolite
Which rock is most felsic out of rhyolite andesite and basalt?
Rhyolite is the most felsic rock out of rhyolite, andesite, and basalt. Felsic rocks have a higher silica content and are associated with continental crust. Rhyolite is typically light in color and has a high silica content, making it more felsic compared to andesite and basalt.
How is andesite different from rhyolite and basalt?
There are rocks that are extrusive (formed quickly on the surface of the earth) or intrusive (formed within the earth under slow cooling). Both types of extrusive or intrusive rocks can vary in composition from mafic (high iron and magnesium content) to silicic (less heavy ions like Fe and Mg, but with more of the lighter elements like Ca, Na, K, etc.). Extrusive rocks range from most mafic to less mafic as such: Basalt, Andesite, Rhyolite (and are all fine-grained b/c they cooled quickly). Intrusive rocks that cool more slowly and have larger crystals range from most mafic to less mafic as such: Gabbro, Diorite, Granite. Basalt and gabbro have a similar composition, just the crystal size differs from different cooling rates (same for rhyolite and granite).
Which rock has a darker color basalt or granite?
Basalt tends to be darker in color compared to granite. Basalt is typically a dark-colored volcanic rock formed from the rapid cooling of lava, while granite is an igneous rock that is lighter in color due to its composition of lighter minerals such as quartz and feldspar.
What are some different types of lava rocks?
Some different types of lava rocks include basalt, andesite, rhyolite, and obsidian. Basalt is the most common type and is dark in color with a fine-grained texture, while andesite is similar but contains more silica. Rhyolite is light in color with a high silica content, and obsidian is a dark, glassy rock formed from rapidly cooled lava.
Is basalt an example of a felsic rock?
No, basalt is not an example of a felsic rock. Basalt is an example of a mafic rock, which is rich in iron and magnesium and typically dark in color. Felsic rocks, on the other hand, are rich in silica and aluminum and are lighter in color.
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.
What are the four kinds of igneous rock?
Igneous rocks are usually classified first by their color index. The color index is separated into four categories. Felsic rocks are the lightest and are composed of mostly quartz and potassium feldspar. Intermediate rocks are the second lightest and are made up of mostly plagioclase feldspar, pyroxene, amphibole, and biotite. Mafic rocks are made up of plagioclase feldspar, pyroxene, and amphibole. Ultramafic is made up of mostly olivine, with pyroxene and amphibole.
State one observable characteristic other than crystal size that makes granite different from basalt?
Granite is typically light in color due to its high silica content and contains visible grains of minerals like quartz, feldspar, and mica. In contrast, basalt is typically dark in color, fine-grained, and contains minerals like pyroxene and olivine.
What is the difference between rhyolite and andesite?
They have different compositions. Most igneous rocks fall into a spectrum ranging from mafic (low silica, dominated by iron, magnesium, and calicum) to felsic (high silica, dominated by sodium and potassium) On this scale rhyolite is felsic while andesite is intermediate. Rhyolite is dominated by the presence of quartz, potassium feldspar, and sodium-rich plagioclase. Rhyolite also tends to contain more volcanic glass. Common colors of rhyolite are light gray, white, and pink. Andesite often contains plagioclase with a fiar balance of sodium and potassium. Plagioclase is also a common dominant mineral. Andesite is darker than rhyolite, ranging from gray to almost black.
What do granite and basalt in common?
They are both lithospheric igneous rocks formed by the cooling and solidification of magma/lava and both of them contains silicon.
What color is rhyolite?
Rhyolite can be white, light gray, or pink.
