Igneous Rocks

Question 1

Andesite

Answer 1

Extrusive intermediate

Question 2

Basalt

Answer 2

Extrusive Mafic

Question 3

Diorite

Answer 3

Intrusive intermediate

Question 4

Granite

Answer 4

Intrusive felsic

Question 5

Gabbro

Answer 5

intrusive mafic.

Question 6

Obsidian

Answer 6

Extrusive felsic, glassy

Question 7

Peridotite

Answer 7

Ultramafic intrusive.

Question 8

Pumice

Answer 8

Extrusive felsic, frothy.

Question 9

Rhyolite

Answer 9

Extrusive felsic.

Question 10

Scoria

Answer 10

Extrusive mafic, frothy.

Question 11

Volcanic Breccia

Answer 11

Extrusive, ash and large particles

Question 12

Mafic minerals (4)

Answer 12

Pyroxene, Ca-rich plagioclase feldspar, olivine, amphibole

Question 13

Felsic minerals (6)

Answer 13

Quartz, K-feldspar, Na-rich plagioclase feldspar, amphibole, muscovite, biotite

Question 14

Intermediate minerals (4)

Answer 14

Amphibole, plagioclase feldspar, pyroxene, biotite

Question 15

Ultramafic minerals (3)

Answer 15

Olivine, pyroxene, Ca-rich plagioclase feldspar

Question 16

Komatite

Answer 16

Extrusive ultramafic.

Question 17

Felsic mnemonic

Answer 17

Fancy girls in rare earrings

Question 18

Intermediate mnemonic

Answer 18

Icy dogs in actual earplugs

Question 19

Mafic mnemonic

Answer 19

Mad goats in bad eyeglasses

Question 20

Ultramafic mnemonic

Answer 20

UnderPants in knightly easements