 The footprints were most likely made over a period of time, perhaps several days, by dinosaurs crossing the channel.The authors also found the shape variation of "Skartopus" and "Wintonopus" overlapped and were even preserved within the same individual trackway.With no significant difference in the form of the footprints, the authors attributed both "Skartopus" and "Wintonopus" were made by the same type of herbivorous bipedal dinosaur trackmakers.