At the top of the hill I now live on is a shale and sandstone quarry. I often walk up there for the view but usually for no reason except a walk. My grandkids like to go up there as well and all of us love to find bits of sandstone with patterns. When one finds a nice bit we all admire it.
I will be moving away within the next two months and was trying to find a nice piece to take to put in our new garden. Then it struck me, why not make a collage of small images; that way i get to look at several patterns. Plus I get to give the grandkids the same images so we all get to enjoy