Trace fossils include tracks, trails, burrows, and any other fossilized behaviors. Trace fossils are named on the morphology of the feature, not on the interpreted trace maker. The ichnofacies conce...Trace fossils include tracks, trails, burrows, and any other fossilized behaviors. Trace fossils are named on the morphology of the feature, not on the interpreted trace maker. The ichnofacies concept groups associations of trace fossils together that likely record behaviors that worked in a particular environment.