Question

Use the drop-down menus to identify the types of convergent boundaries.

Label A


Label B


Label C

Answer 1

I don't have the diagram, so I can't be certain which label is which. Could you upload the image or describe what each labeled area shows (e.g., trench, volcanic arc on a continent, island arc, mountain range, type of crust on each side)?

In the meantime, here are the three possible convergent-boundary types and how to recognize them — you can match these to the labels in your diagram:

- Oceanic–continental convergence: an oceanic plate sinks (subducts) beneath a continental plate. Look for an ocean trench at the boundary and a volcanic mountain chain on the continental plate inland from the trench (example: the Andes).

- Oceanic–oceanic convergence: one oceanic plate subducts under another. Look for an ocean trench and a chain of volcanic islands (an island arc) between the two plates (example: the Aleutian Islands).

- Continental–continental convergence: two continental plates collide and crumple; there is little or no subduction, no deep trench, and you get a large mountain range (example: the Himalaya).

If you upload the picture or describe each label, I’ll map A, B, and C to the correct type. If your diagram is the typical left-to-right set, a common ordering is: A = oceanic–continental, B = oceanic–oceanic, C = continental–continental.