12. For this question, please load the Plate Tectonics.in file in Google Earth. The file shows the location of earthquakes that occurred from 2016-2017 represented as dots. Note the legend; the

depth of the earthquake focus is represented by the color of each dot. Look at the Pacific coast of South America near the intersection of the boarders of Argentina, Bolivia, and Chile (see image below). Do earthquakes become deeper towards or away from the coast? What type of plate boundary is located here, and how does it explain this phenomenon?