Figure 3 from Fiorillo et al. (image) Geological Society of America Caption This image depicts the size ranges of tracks found in Denali National Park, Alaska. Credit A.R. Fiorillo et al., Geology, 2014 Usage Restrictions Credit to Geology and to authors. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.