How deep is treasure buried/how far from the mark?

[MagpieOAO]

I got a treasure map, dug out a small cavern and might move in because I can't find the treasure D:<

Dug out shallow all the dirt around it maybe in 10x10 down to the stone, dug down in the stone below the mark. Nothin. How deep? How wide?

Thank you!

[Zane Mordien]

Vanilla treasure map? If so they are pretty shallow but 10x10 should have been plenty. Better ruins is a different story.

[Parenn]

I’ve found them exactly under the marker, and sometimes 40+ blocks down (that was in a mountainous area).