|
After they get down mining a particular section, they fill it in with concrete. Many times they will abandon equipment and fill around it.
Imagine a million years from now coming across what could only be discribed as "a metal rock eater"!
__________________
Michael D. Holloway
https://simple.m.wikipedia.org/wiki/Michael_D._Holloway
https://5thorderindustry.com/
https://www.amazon.com/s?k=michael+d+holloway&crid=3AWD8RUVY3E2F&sprefix= michael+d+holloway%2Caps%2C136&ref=nb_sb_noss_1
|