Answer:
Hey!
What you have put up simply describes a DESTRUCTIVE PLATE BOUNDARY
Explanation:
The "upper continent" is actually the HEAVIER, OCEANIC PLATE which DOES subduct under the "lighter continent" aka the CONTINENTAL PLATE...
VOLCANOES are very common...often with frequent eruptions as the plates are tirelessly moving...
FOLD MOUNTAINS are formed on the lighter crusts as result to the forses acting upon it from the subducting plate...
HOPE THIS HELPS!