Convergent
Step-by-step explanation:
If the mountain chain is on land, it would open up a fissure of lava, in which the lava would harden forming rock. As more magma rises up, the pile beginings to gradually grow. The sedimentary part would be convergent because it would push one plate over the other, leaving a small mountain or mountain chain. Larger Mountains would if this process occurred numerous time in the same spot or one large convergent plate boundary formed.