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The list that accurately shows rock composition increasing in silica and decreasing in iron and magnesium is peridotite, basalt, granite.
Granite
Granite are intrusive igneous rocks . This individual constituent of this rocks solidifies below the earth surface . The solidification takes place slowly and this why the grains are large enough to be visible with the eyes. Generally, the slow crystallization of magma forms granitic rock.
Granite rock is composed mainly of quartz and feldspar and minor amount of mica and amphiboles. Granite contains high amount of silica.
Granite has relatively small amount of magnesium and iron minerals
Basalt
Basalt are are extrusive igneous rocks. They are formed by magma just like granite rock but the process of solidification are faster. The grains of basaltic rocks are tiny unlike granitic rocks. it is nearly impossible to see individual minerals without magnification. They are composed of silicate minerals. But the silicate contents are less than granite.
Peridotite
Peridotite are extrusive igneous rock. They are coarse grained . There silica content is low compared to other igneous rocks. Peridotite contains higher amount of magnesium and iron minerals than basalt and granite rocks.
Therefore, the list that accurately shows rock composition increasing in silica and decreasing in iron and magnesium is peridotite, basalt, granite.
learn more on rock composition here: https://brainly.com/question/13398027?referrer=searchResults
