But that is not the case at the monument. It is made of limesone quarried just six miles from a famous cave with identical formations.
Also, there was no concrete in the farmers field pipe that made the big teepee mound in wyoming.
Sounds like another "just so" explanation that doesn't add up.
Because you will never accept any explanation.
The stalagtites in the building could be from the mortar used in the building, water runs over the surface and picks it up and deposits it in the basement.
I assume the farmers field had minerals that had already dissolved somewhere, maybe in an underground cave. Some water forced it to the surface where it could quickly build up. The carbonate is already there, it just needed to be picked up by the water.
It doesn't matter because the point is that the process that takes time is the limestone naturally dissolving into carbonate to form the stalagtites. If the mineral is already dissolved, then stalagtites formation can be much faster. You can take limestone and manually crush it and add acids to dissolve it and form stalagtites quickly, but that just doesn't happen naturally in a cave, which is a set process that takes a set amount of time.