In my recent class, I had an incident where a fin came off, and I lost my balance and put my hands in the silt. This was in an area that wasn't clay, but just that fine, fluffy brown silt. I have gotten a bunch of grief for damaging the cave, and I'm wondering how long marks in the silt like that will persist? I know in MX, I've seen marks last over a year, but the caves in MX don't flood and have less flow.

Anybody have any idea how long my "damage" is going to be there to bother other people?