A fossil is defined as the remains of an ancient animal or plant. Some fossils are not the remains of the organism, but traces of its life. These trace fossils are called ichnofossils and dinosaur tracks are a type of ichnofossil.
Dinosaur footprints are rare and require specific events to occur for their preservation.
This impression would then dry out and harden and then be rapidly covered by fine muds or silts which in turn would harden, thus preserving the impression. Multiple footprints associated with the same dinosaur are called trackways. Dinosaur footprints . Biped Dinosaur footprint Tere es Cliff. New Mexico Museum of Natural History Dinosaur Footprint Page.