Assume that this foliated rock is oriented so that north is at ...

[tnt_battle]

Assume that this foliated rock is oriented so that north is at the top of the image. From which compass directions is the greatest differential stress coming?
 
  A) North and south
  B) North and east
  C) South and west
  D) West and east

Question 2

Compare and contrast how the aureole of contact metamorphism will change in thickness depending on the intrusive igneous structure.
 
  What will be an ideal response?

[Fayaz00962]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: If the igneous structure is small (e.g. a dike), then the aureole will also be small, only a few centimeters in thickness. However, larger igneous bodies have more heat that they will release over a longer period of time. This means that the aureole will be more extensive (several kilometers for those around batholiths) and have zones of metamorphism.