Cretaceous Ground

A picture I took during a field trip at the Teufelsmauer in the Harz Mnts (Germany). I guess most people whre taking pics of the Teufelsmauer itself ([link]), but I was also fascinated by the ground

Those sandstone pebbles and the entire Teufelsmauer are from the Upper Cretaceous. I like those tanish colors better compared to ruddy sandstones.