Trace fossils are evidence left by animals in the rock record (such as tracks, trails, burrows and borings) that can be used by the creationist modeler to: (1) more accurately interpret depositional environments and (2) more confidently defend the creationist model. Trace fossils are useful in these regards, because they reflect animal responses to a wide variety of environmental conditions, such as abundance of nutrients, photic levels, salinity, temperature, pressure, oxygen levels, and predators, to which lithologic materials cannot easily respond. Trace fossils are important because: (1) they are found in numerous rocks devoid of body fossils, (2) they have a narrow facies range, (3) they are almost never transported, and (4) they span most, if not all, of the sedimentary record. By being able to interpret these "contemporaneous witnesses," the creationist modeler has another "arrow in the quiver" in the argument against the concepts of uniformitarianism and geological evolution.