where can I (legally) scavange shale in Metro area?
I live in st Paul MN and would like to find a cheap or free source of shale to use for a fireplace. I see it in various places by the road in parks and such but dont want to take any, I dont think you can take from a park... so I am looking for alternatives.
Does anyone know of a place where I can find some shale? looking for sizes ranging from 4-12 inches.