Dinosaurs once stomped across much of the planet, sometimes leaving tracks in mud that were buried in more mud and later hardened to stone. this sample is from the philmont scout ranch in new mexico. it is a loose block that fell down from a cliff above. the footprint was made by a tyrannosaurus rex. the print is 33 inches long (almost 3 feet for one foot! ) and 28 inches wide, and extended 9 inches deep into the sediment. the sun was shining as indicated, and the black arrows point to shadows from two of the three toes of the track. is the rock with the track now upside-down (you are looking at the side that was down when the sediment was soft) or right-side up (you are looking at the side that was up when the sediment was soft)?