Put the summary of the bug you're having here

What I expected to happen was...:
I entered the world and came across the bad lands biome, only there was a block of stone in the middle. I think where it was to generate stone peaks it became bad lands and it stayed like that

What actually happened was...:
blocks of stone joined with bad lands

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...