Ray Stanford believes the dinosaur was running potentially away from a predator, when it left the footprint.
"This is really quite a rare find," the New York Daily News quoted Stanford as saying in a video posted on NASA's website this week.
"Nodosaur tracks are not often found.
"There are some out West and up in British Columbia and Canada, but we don't have a whole lot of them in the U.S," he said.
Stanford told the Washington Post that the plant-eating dinosaur made the nearly 14-inch-wide imprint with his back left foot.
Excited by the discovery, NASA scientists have accepted Stanford's research, and will reportedly bring in more expert opinions to fully confirm the finding.