Recovering slate stepping stones
(New Haven, CT, USA)
I am recovering some sunken slate stepping stones from the yard of the house I just bought. Some are intact, but most are brittle and flaking heavily. There are already tons of very brittle, almost paper-like flakes in the soil. Wondering if I need to remove all the flakes from the soil or if I can simply re-bury them and let them return to nature?? Thanks!