The dinosaur tracks at this site were among the first to be scientifically described in 1836, and are still visible to visitors. Hundreds of tracks, which were made by as many as four distinct types of two-legged dinosaur, are present in the sandstone outcrops. Additional fossils that have been found at the site or nearby include invertebrate burrows, fish, and plants (including charcoalified logs and leaves). The parallel orientation of many of the dinosaur trackways was among the first lines of evidence used to support the novel theory that dinosaurs traveled in packs or groups.