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Igneous Rocks

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Total cards: 24•Content version: v3•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

What are igneous rocks made of

Back (Answer)

feldspar + a mix of dark and light silicates

#2
Front (Question)

most abundant element in crust

Back (Answer)

Oxygen

#3
Front (Question)

What are dark silicates composed of (elements)

Back (Answer)

Fe + Mg

#4
Front (Question)

Examples of Dark silicates (First to last to crystallize)

Back (Answer)

Olivine, pyroxene, amphibole, biotite mica

#5
Front (Question)

What are light silicates composed of (elements)

Back (Answer)

K + Na + Ca

#6
Front (Question)

What are examples of light silicates first to last to crystallize

Back (Answer)

Feldspars, Muscovite Mica, Quartz

#7
Front (Question)

Most abundant mineral group in crust

Back (Answer)

feldspars, then quartz

#8
Front (Question)

How much do feldpars make up of most igneous rocks

Back (Answer)

40%

#9
Front (Question)

Granitic or ___ rocks

Back (Answer)

felsic

#10
Front (Question)

Percentage of dark silicates in granitic rocks

Back (Answer)

10%

#11
Front (Question)

Dark silicates in granitic rocks

Back (Answer)

Amphibole and biotite mica

#12
Front (Question)

Light Silicates in Granitic Rocks

Back (Answer)

Quartz, pottassium feldspar, and some plagioclase feldspar

#13
Front (Question)

Examples of granitic rocks and if they’re extrusive or intrusive

Back (Answer)

granite (intrusive), rhyolite (extrusive)

#14
Front (Question)

Basalitic or ___ rocks

Back (Answer)

mafic

#15
Front (Question)

Basalitic rocks are composed of what percentage of dark silicates?

Back (Answer)

45%

#16
Front (Question)

Basalitic rocks are comsoed of what dark silicates

Back (Answer)

olivine and pyroxene

#17
Front (Question)

Basalitic rocks contain waht light silicates

Back (Answer)

calcium rich plagioclase feldspar

#18
Front (Question)

Tyoes of basalitic rocks and extrusive vs. intrusive

Back (Answer)

basalt - extrusive, gabbro - intrusive

#19
Front (Question)

Where to find basalitic rocks

Back (Answer)

volcanic islands & Ocean floor

#20
Front (Question)

Andesitic or ____ rocks

Back (Answer)

intermediate

#21
Front (Question)

andesitic rocks are composed of what percentage of dark silicate rocks

Back (Answer)

25%

#22
Front (Question)

what dark silicates are andesitic rocks composed of

Back (Answer)

Pyroxene, Amphibole, biotite mica

#23
Front (Question)

what light silicates are andesitic rocks composed of

Back (Answer)

plagioclase feldspar

#24
Front (Question)

where are andesitic rocks found

Back (Answer)

seaward margins or volcanic islands in aleutian island chain