Subduction zone.....This is usually an oceanic plate being subducted beneath a contenental plate as oceanic is less dense.
I am pretty sure it is Dallas
The imaginary line that divides the earth into in this case the north and south hemispheres is called the Equator and it passes through Ecuador and actually Ecuador is the Spanish word for Equator. The French explorer La Condamine spent 10 years in Ecuador studying the equator and determined the oblate spheroid shape of the world.
Tenacious qualities necessary for a historian