This looks like it could have been caused by water penetrating a softer substance, causing it to harden, and then the surrounding material was removed by erosion.
burner-inserter loops aren't a bad way to dispose of wooden power poles after refactoring your early base. I usually just set up a logistics chest to request some and then feed them into the burner inserter loop.
I built a python library warhammer-stats for the Warhammer 40k tabletop game because all the other tools sucked. It is still the only 40k stats tool that can deterministically calculate the entire probability mass function for attack damage.
I then wrote an iOS app, Stats Hammer, because I wanted to use it on my phone and wanted to learn some swift.
Both are free for anybody to use and it warms my heart to see people using them, but I don't really care if either succeeds because I got what I wanted out of them