intrusive rocks

Question 1

what are intrusive igneous rocks

Answer 1

magma which slowly cools and crystallizes underneath the earth’s surface

regardless of shape and size, all intrusive bodies are called “plutons”

Question 2

two types of igneous rocks

Answer 2

plutonic rocks

hypabyssal (subvolcanic)

Question 3

what are plutonic rocks

Answer 3

pluto relating to god of the underworld

slow cooling and crystallization of magma at moderate to great depths with earth’s crust

Question 4

plutonic rock crystal size

Answer 4

slow cooling and crystallization results in coarse-grained, phaneritic, crystals (2-16mm, BGS)

Question 5

what are hypabyssal (subvolcanic) rocks

Answer 5

slow cooling and crystallization of magma at shallow depths (<2 km) within earth’s crust

Question 6

hypabyssal (subvolcanic) rocks crystal size

Answer 6

slow cooling and crystallization results in medium-grained, phaneritic, crystals (0.25-2mm, BGS)