| The presence of arthropods, the first animals to develop legs, is indicated by characteristic trace fossils. |
| The shelly fossils of Tyndall Stone are certainly intriguing, but it is the trace fossils that make this limestone an attractive building stone. |
| All but the latest Ediacaran trace fossils are relatively simple, suggesting limited and primitive behaviour patterns. |
| The development of Skolithos trace fossils on the upper surface of some beds suggests periodical emergence into an intertidal zone. |
| For millions of years to follow, trace fossils show a slow but constant diversification of land plants. |
| Li and Ding interpreted such structures as metazoan trace fossils. |
