The other thing i wonder - is how would a world shifting cataclysmic earthquake originating from that central mountain ring change the landscape...

this map is the changed version and i am working on the original map from a 1000 years past, but not as fast...

should there be fissures or fault lines spreading from that central mountain ring, or would they become rivers?

Would new mountain ranges be created and could the current ones on the map be explained as being altered by such an event?

For example, the island mountain in the north east was the centre of a dwarven empire and the underground tunnels collapsed, letting ocean water in and sinking a portion of the land.

I dunno... in a fantasy world does the proper geological forces matter?

Input on these sorts of things is helpful.

phil