Scaphites are very plentiful locally out here in the wild wild west. The Mancos Shale, where they are found, turns into a very gooey, slick, gumbo when it gets wet. Most of the roads used to be built right on the shale with a very thin layer of gravel. When the roads needed repair or an annual resurfacing the road crew would go to the nearest outcrop of gravel or crush some local rock to fix the road. There are a few places I know where they found large concretions (up to 10' dia.), some packed with Scaphites and other fossils, crushed them up and spread them over the road. Of course now you have to have a paleontological survey (among others) done before even the smallest construction can occur.