Trace fossils include footprints, trails, burrows, feeding marks, and resting marks. Trace fossils are formed when an organism makes a mark in mud or sand. The sediment dries and hardens. It is covered by a new layer of sediment.Click to see full answer. Also know, is a dinosaur footprint a fossil?Tetrapod footprints, worm trails and the burrows made by clams and arthropods are all trace fossils. Perhaps the most spectacular trace fossils are the huge, three-toed footprints produced by dinosaurs and related archosaurs. These imprints give scientists clues as to how these animals lived.Additionally, how do scientists know that the footprints they found came from dinosaurs? Fossil Footprints We have learned everything we know about dinosaurs by studying fossils. When dinosaurs died, their bodies were covered with sediment. After many years the sediment became rock, and the remains of these creatures turned into fossils. These fossils help scientists learn about what dinosaurs were like. Regarding this, how are dinosaur fossils formed? Fossils are formed in a number of different ways, but most are formed when a plant or animal dies in a watery environment and is buried in mud and silt. Soft tissues quickly decompose leaving the hard bones or shells behind. Over time sediment builds over the top and hardens into rock.Are stromatolites trace fossils?Trace fossils are those details preserved in rocks that are indirect evidence of life. Trace fossils include burrows, track marks, coprolites (fossilized feces), stromatolites (fossilized algal mounds), and rhizoliths or rhizocretions (fossil remains of roots).