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Both andesite and basalt are volcanic rocks. Basalt is denser and generally darker than andesite. It has a lower silica content and more iron and magnesium. It most often forms from pahoehoe or a'a lava flows and occasionally scoria cinders. Andesite forms from more slica-rich material and is often found in the form of ash, pumice, or volcanic bombs. It may also sometimes form block lava flows, which are more viscous that a'a or pahoehoe.
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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.
Which rock has an intermediate composition?
Andesite is a rock with an intermediate composition. It contains minerals such as plagioclase feldspar, amphibole, and pyroxene, giving it a balance between light and dark minerals. Andesite forms from the cooling of magma with a composition between basalt and granite.
What kind of rock andesite?
No. Andesite is classed as an 'intermediate' rock, being halfway in composition between a mafic and felsic rock. Mafic rocks are those that contain alot of ferromagnesian minerals (iron and magnesium) which give mafic rocks their dark colouring. Typical ferromagnesian minerals include olivine and pyroxene. Typical mafic rocks are basalt and gabbro. Felsic rocks, on the other hand, are low in magnesium and iron and are usually light in colour, such as granite and rhyolite. Andesite therefore typically contains a mixture of both felsic and mafic minerals and is classed as 'intermediate'.
How would you explain the abundance of andesite and basalt in leyte?
The abundance of andesite and basalt in Leyte is due to its location along the Pacific Ring of Fire, a region known for volcanic activity. The presence of nearby volcanoes and tectonic plate movements has led to the formation of these volcanic rocks in Leyte. Additionally, the continued activity of these geological processes over time has contributed to the abundance of andesite and basalt in the region.
What is the difference in composition between a dacite and an andesite?
The main difference between dacite and andesite lies in their silica content. Dacite has a higher silica content than andesite, making it more viscous. Dacite also typically contains more quartz and less mafic minerals than andesite.
What is the Rock?
Yes
Is andesite basic or acid?
Andesite has an intermediate composition between "basic" and "acid."
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.
What is the igneous rock between granite and basalt?
Andesite is considered an intermediate rock between granite (felsic igneous rock) and basalt (mafic igneous rock), based on chemical composition.
What is the protolith of andesite?
The protolith of andesite is typically basalt or other mafic volcanic rocks. Andesite forms through the partial melting of these basalts in subduction zone environments, where water and other volatiles lower the melting point of the rock. Additionally, andesite can also originate from the mixing of basaltic magma with more evolved, silica-rich materials. This results in andesite's intermediate composition, which lies between basalt and rhyolite.
Which rock has an intermediate composition?
Andesite is a rock with an intermediate composition. It contains minerals such as plagioclase feldspar, amphibole, and pyroxene, giving it a balance between light and dark minerals. Andesite forms from the cooling of magma with a composition between basalt and granite.
Name a volcanic rock?
Obsidian, basalt, andesite, pumice.
Melting of wet basalt under pressure can consistently produce?
andesite
What are the types of extrusive volcanic deposit?
Ignimbrite, Andesite, Basalt, Rhyolite
What kind of rock andesite?
No. Andesite is classed as an 'intermediate' rock, being halfway in composition between a mafic and felsic rock. Mafic rocks are those that contain alot of ferromagnesian minerals (iron and magnesium) which give mafic rocks their dark colouring. Typical ferromagnesian minerals include olivine and pyroxene. Typical mafic rocks are basalt and gabbro. Felsic rocks, on the other hand, are low in magnesium and iron and are usually light in colour, such as granite and rhyolite. Andesite therefore typically contains a mixture of both felsic and mafic minerals and is classed as 'intermediate'.
What is an andesite?
a dark, fine-grained, brown or grayish volcanic rock that is intermediate in composition between rhyolite and basalt.
What is andestic?
If u are referring to andesitic basalt, lava having a greater silica content than that of basalt. Andesite is a rock.
