Small impression of an Inoceramus. These are normally quite large, flat shells, 2-3 foot across, and usually broken into millions of fragments.
Well, we didn't make it out of the site fast enough. The white chalk is like ice when it gets wet, so slick you can barely stand on it. These guys were slipping and sliding trying to push this car up a slight incline. We put branches and limbs under it to get traction.