Relative Dating

Tracks of organisms are important trace fossils. Animal tracks that have fossilized can tell scientists the approximate time on the geologic time scale that an organism existed. While the tracks are not evidence of the fossil’s main skeletal structure, the tracks provide clues about the size and weight of the organism. In the image shown, you can see the tracks of two different dinosaurs.

What can you tell about the organisms by looking at the tracks? Why? Can you tell which tracks are the oldest? Why? Respond to these questions in the discussions area. Then, return to the topic several times over the next few days to read your coursemates’ posts. Reply to at least two of them, making sure to offer new insights, ask questions, and encourage further conversation.