8) Review the section in your Earthquake chapter titled "Subduction Angle." Now consider this question:

8) 

When the Rocky Mountain rose, starting about 70 my ago, subduction of the Farallon oceanic plate beneath North America involved a high rate of subduction and a mid-ocean ridge that was close to the subduction trench.  This is further detailed in the video—Rocky Mountain Uplift Part 2

Recognizing that this proximity of the newly formed ocean crust to the subduction trench means that the descending plate was relatively warm....decide whether or not the subduction angle at that time would have been steepshallowexplain