On: Metal monolith found by helicopter crew in Utah de...

[tokai]

I think stele would be the right word maybe?

https://en.wikipedia.org/wiki/Stele

[hprotagonist → tokai]

Probably not. Solid metal objects at that scale have not been a feature of human history for particularly long, they probably don't have a name that's normally used in an archaeological context.

[h2odragon → hprotagonist]

https://en.wikipedia.org/wiki/Iron_pillar_of_Delhi

[hprotagonist → h2odragon]

that’s super cool!

[dhskdnsjfnfj → hprotagonist]

In fact there is an art-historical precedent, dating back half a century, for calling modern vertical land art pieces "stele." Michael Heizer did it.

http://legacy.earlham.edu/~vanbma/index/121299heizer-art.htm

http://doublenegative.tarasen.net/city