Found in the basement : some sort of typeface selector? It’s a notched plastic wheel, with different sigils all around the outside edge. It’s one of many. It looks like a sort of rotary punch card. I’m not sure what you would do with it.
A closeup of a roof fragment. It’s slate with bits of salt water having infiltrated into the cracks and having dried there from a now-gone ocean millions of years ago. There’s an orange tint that I think is from iron.
Note that I’m not a geologist and am mostly guessing. I took the picture using just my headlamp light, which gives an idea of the focused view you get when there’s no other lights around.
This is the giant electromagnet that pulls metal off of the conveyor belt, so that only rock goes into the rock crushers, and not metal fragments. If you look closely, you can see that the metal drill bits are aligning themselves with the magnetic fields put out by the magnet assembly, to the point where they are forming a sort of ‘flower’ shape. Science!
This dish sat for a few years near the mine production shaft. It was about 60 feet off the ground and vertical, so there’s no buildup. Just the salt dust in the air was enough to corrode the paint off. It’s hard to see, but the dipole in the center is about to snap off, from corrosion around the retaining ring.