foliation

non-foliated

lineation

schistosity

a standard model of some sort used to describe everyday occurrences

the same thing as a guess

a statement or description of some observed natural phenomena that appears always to be true

a well-tested and generally accepted explanation for some observed natural phenomena

a tentative explanation for some observed phenomena that is the starting point for further investigation

Glaciers 

Plate tectonic forces

Wind

Humans

Water

Fast flowing and far-spreading lava flows

Explosive eruptions

possible pyroclastic flows and lahars

A and C

C and D

are produced at cooler temperatures but greater pressures

always contain more quartz and feldspar

are produced at greater temperatures and pressures

are produced closer to the surface

foliated marble

non-foliated gneiss 

non-foliated marble

foliated carbonate schist

the grades of non-foliated metamorphic fabric

the formation of mafic and felsic intrusions

the metamorphic grade is increasing 

the progression of mafic to felsic igneous rock formation 

Quantitative data

Temporary data 

Qualitative data

Collective data

A deep ocean trench is formed from the subducting slab dragging the edge of the overlying plate.

Subduction occurs when there is convergence between two tectonic plates which one or both have oceanic crust.

Subducted crust is destroyed and recycled back into the mantle.

The tectonic plate with continental crust is always subducted because it is denser than oceanic crust.

Decompression melting of mantle asthenosphere due to mantle upwelling.

Decompression melting from a rising mantle plume.

Flux melting due to the addition of water in minerals of the subducting plate to the mantle.

Heat transfer melting of the subducting plate as temperatures increase and completely melt oceanic crust.