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Magma can be formed from the subduction and melting of cold, dense, wet oceanic crust at some convergent plate margins. The moisture in the rock assists in the melting of the crust and the rock surrounding it. Magma is also formed at hot spots in the mantle where hot material undergoes decompression melting as it rises. Decompression melting also occurs at the mid-ocean ridges where new oceanic crust is formed from rising mantle rock.
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What is the earth magma?
it's lava but in it's liquid form. A common misconception between magma and lava is lava is solid and magma is liquid hot.
What does magma with high silica content form?
When it cools and crystallizes into rock, the rock will be described as felsic igneous rock. Examples of felsic igneous rocks are granite, rhyolite, and pumice.
What are the factors that might cause magma to form a laccolith instead of a sill?
the chemical and physical particles
What is the only kind of rock that can form directly from magma?
By definition. A sedimentary rock is formed from sediments, chemical, organic, or clastic. A metamorphic rock has undergone a change in mineral alignment or mineral composition due to heat and/or pressure. An igneous rock forms from solidification of magma via cooling.
Mica and feldspar form from slowly cooling magma that solidifies into a what?
intrusive igneous rock eg Granite
How does magma form geological features?
by magma
How are mineral formed by crystallization from magma?
As magma cools, elements combine to form minerals.
What has to happen to magma for glass to form?
The magma has to crystalize...
Are pyroclasts formed by basaltic magma or andesitic magma?
Pyroclasts can be formed of any type of magma. However, they are more likely to form with andesitic than basaltic magma. Rhyolitic magma will also readily form pyroclasts.
What is the plural of magma?
The noun magma has no plural form; magma is an uncountable noun, a word for a substance.
Where do intrusives rocks form?
They form underground from the cooling and solidification of magma.
What does magma pushed into a thick sill form?
magma pushed into a thick sill can form what
Does granite form from magma?
Yes, granite is formed from cooling magma.
Does granite form magma?
Yes, granite is formed from cooling magma.
How does magma from igneous rock?
magma cools to form igneous rock
How does magma form a volcano?
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Which process in the rock cycle causes magma to form?
Melting is the process in the rock cycle that causes magma to form.
