From the press release:
Newly Discovered Fossil Footprints from Grand Canyon National Park Force Paleontologists to Rethink Early Inhabitants of Ancient Deserts
New Mexico Museum of Natural History & Science
The track-bearing boulder (Coconino Sandstone), Grand Canyon National Park, Arizona. General view of the boulder and the tracks (left). False color depth map (depth in mm) (right). Scale: 50 cm (NPS Photos).
Credit: (NPS Photos)
Note: Representative image at left is often cropped for display purposes. Downloaded high-resolution images are not cropped.