User blog comment:Mrob27/Block type 130/@comment-68.226.70.27-20111206231901/@comment-4583259-20111207032920

That's a cool idea. These strange blocks might be connected to spawning, but they certainly are not connected to the locations of Astronaut_lairs.

As described here, I have decoded the map data (which is freely accessible in the backups that iTunes saves on the PC) and I've looked at a whole lot of maps with my program. I made the block 130 show up in bright red so it stands out. My program also identifies astronaut lairs and makes them easy to see as well. There is no correspondence between the location of block 130's and the astronaut lairs.