Question

A fault (F) breaks three layers of sedimentary rock (S). An igneous intrusion (I1) has broken through the bottommost layer of rock. A second igneous intrusion (I2) has moved up the fault and pooled on top of the uppermost layer of rock. Which event would be considered the youngest?

Answer 1

Answer: Option B -- The intrusion of I1 or I2 is the youngest event. Without more information, we cannot know which igneous rock is youngest.

Option A, option C and option D are wrong