Redlands Okie
Veteran Member
Once again a example of a unexpected and interesting subject matter in this forum. Thank you all 
Iron Range - Wikipedia
The area was subsequently high modified during the ensuing two billion years, most recently by the Pleistocene continental glaciers and likely periglacial jokulaup floods, which could move massive amounts of rocks and soil, and also weather them into the common cobble shape your specimen has.
I went to cut it in half today and it had moved. There is a strange looking tiny antenna sticking out near one end and you can hear faint intermittent beeping sounds..... and once and awhile you hear a grinding noise...... ????????????????????
Uh, Huh...
It is probably communicating with nearby pallets.