@ Bum Luck
Checkmarks are survey marks correct? What do the square (seen alot divided in half) and triangle mean from a survey point of view. Found what I believe is a corner or line marker did not move but found metal ring with a few cold links on it under edge of it ring (lol) any bells. Bum Luck = lots of skills.
Thanks all and good luck
BTW down to 7 feet no treasure under marks!
Don't know what "checkmarks" are; never heard the term. A triangle normally is used for a "control" station, or a mathematical point we use as a corner to set our instruments on when we run a traverse. That "control network" is only important to us internally as we go from point to point. It has evolved since the 1830-50 era of the original surveys around here, when the method was to 'set' their transits on the line they were running. Now, with the improvement in technology, we aren't tied to that line.
For a corner, surveyors being a practical lot, they would use what was handy when they got there; they'd grab a stone that was different, preferably one that when stood upright, was distinct from the others laying around. They'd generally mark it with an X, as I said. I've not found any other mark on a stone, and a lot of unmarked ones. It's possible that someone carved a "1/4", but only in a Public Land Survey state (one with sections).
They did use hash marks on the (around here) wood posts depicting the distance north and west of the Township corner, but again, the Deputy Surveyors' instructions from the Surveyor General around here were to use wood stakes, not stones. Stones were used in resurveys of the sections, later.
They were instructed to use and mark bearing trees as witnesses to the corner if it was lost, but not to rock, a curious thing to me since rock faces did not move, and trees were cut down or rotted away.
I've never seen a mark near a corner, like on a rock face, but have seen a lot of Indian petroglyphs of all shapes on rock faces. Triangles, squares, "turkey tracks", teepees, wavey lines - lots of them. I' m not saying it's not possible, since resurveyors (like county surveyors) had more latitude in their actions since they weren't bound by contracts.
Here's a link to a map of the PLSS states so you can see where you are:
Public Land Survey System - Wikipedia, the free encyclopedia