well on my creative world, I returned to my villiage after a while of building in the nether. As I got into the town I quickly noticed somthing very different, a massive 40X40 hole, seemingly naturaly made (aka not a perfectly square chunk error.) was in my town, completly destroying the mansion I had build earlyer. I'm posting this under modded client because although I did have the grey goo mod instaled, I did not put any of the goo anywhere near my villiage. Luckly I had a backup of the world befor I had ever placed down any goo but still had the mod installed, the hole was still there. If you know what happened, please explane.
Spontaniously generating massive crater