Yes, save stone. All of it.

https://steamcommunity.com/sharedfiles/filedetails/?id=2760270389

I had to put "walls" of upraised ground around my base after 3 trolls nearly destroyed it in a raid. I ran out of stone, and had to go mountains to deliberately mine more stone (like the OP). Even the base of my hall is more stone ground upraised into "walls" (it's hollow, my hall has a "basement" workshop area).

These "walls" are completely indestructible by the way.