A transgression of sea level

A lateral translation of tectonic plates

A regression of sea level

A depression of land

Mafic; gabbro

Intermediate; andesite

Intermediate; peridotite

Felsic; rhyolite

Felsic; Granite

Ultramafic; peridotite 

The igneous rock cooled very quickly

The rock is an intrusive igneous rock

The igneous rock cooled slowly

are produced closer to the surface

are produced at greater temperatures and pressures

always contain more quartz and feldspar

are produced at cooler temperatures but greater pressures

Dike

Sill

Batholith

Laccolith

atom becoming a cation from addition of electrons in the outer shells (orbitals)

atom becoming a cation from subtraction of electrons in the outer shells (orbitals)

atom becoming an anion from addition of electrons in the outer shells (orbitals)

atom becoming an anion from subtraction of electrons in the outer shells (orbitals)

D

A

C

B

non-foliation

schistosity 

foliation

lineation

Banded gneisses

Metamorphic schists

Non-foliated quartzite or marble

The rock has experienced a lower degree of metamorphism (low grade metamorphism) with lowest of pressure and temperatures for metamorphism.

The rock has experienced a greater degree of metamorphism (high grade metamorphism) with higher pressure and temperatures.

The rock has experienced a intermediate degree of metamorphism (medium grade metamorphism) with mid-ranging pressure and temperatures for metamorphic conditions.