Should've said more common in my immediate area of the northern tier where camp is? There is some shale in our area, but pretty much everyone uses gravel on roads and driveways.
Never used to see much crushed limestone around there before gas operations started, now some of the twp. roads they've redone, were topped with modified limestone.
At least a half dozen former springtime "swamp holes" in the gravel roads were dug up and filled with crushed limestone in the past three or four years by gas company contractors.
And this summer limestone is everywhere on roads, driveways, etc.
They removed the "frack" pad at the well site down the road in August and all that limestone is now here, there and everywhere. It was pushed into a huge pile at one end of the pad free for the taking and the twp. boys have distributed it where needed.
Quite a bit went over the hill from camp, on the formerly mucky cemetery driveways. Many of my neighbors now have spiffy driveway entrances. Natcherly, no one thought to dump any in my camp driveway ruts.