Mountains based on a "Pangea" world

[Osellic]

Hey gang, here is a link to my world and where they would have connected during the pangea phase.

https://www.flickr.com/photos/130288...7683581257583/

Do I need to add mountains at every point they once connected?

Thanks.

[Agricolus]

I would. If you wish to spice up the world-building, add some really high, maybe almost impassably high ranges where two large land masses come together. You can use the resulting cultural separation and DNA branching to create diversity, both welcome and antagonistic.

[Caenwyr]

Do I need to add mountains at every point they once connected?

To be honest, I wouldn't! If these red arrows were to illustrate convergence, I would put mountains at at least some of the coastlines, since converging plates would probably push one another up (i.e. one would go underneath the other, pushing the first one down into the mantle and the other one up into a string of mountains/volcanoes/islands/...). Think of examples like the Alps, the Andes, the Himalaya, the Indonesian island chain etc.

But since these arrows indicate where certain landmasses used to be, we're actually talking about divergence. These are usually characterized by clefts and rifts, both on the bottom of the ocean separating the two landmasses or (if they're not fully separated yet) in the middle of the landmass. Think of places like the floor of the Atlantic, the African Rift Valley and to a lesser extent the Rhine Rift (a divergence which stopped before it managed to break the European mainland apart).

In short, since you're working with one single landmass that was just broken up, you should have divergent landforms between all of the current landmasses, and convergent landforms elsewhere in the ocean -- where different oceanic plates crash together, again with one plate diving beneath another resulting in ridges. Most of these ridges will stay below sea level, probably (depending on how deep your oceans are), but some might actually puncture the sea surface and result in island chains.