The long-necked dinosaur footprints were each about the size of a trash can lid, Ms. dePolo said, with the largest being more than two feet in diameter. She and her colleagues estimated that the sauropods who left the tracks were about six feet tall at the hips, much smaller than the titanosaurs that would later roam the Earth. The theropods were only about three feet at the hip, she said.

The impressions were all found in the same sediment layer, which indicated to the team that the sauropods and theropods shared the stomping ground. The team also found fish bones in the layer, suggesting that the location was once a marshy lagoon.

Ms. dePolo plans to explore the Isle of Skye for more sauropod and theropod footprints. She and her colleagues are asking anyone who thinks they might have spotted a dino track on the island to reach out.

“Let the big nerds who do this for a living know, so we can chase them down and tell these dinosaurs’ stories,” she said. “I’m willing to look at a thousand tidal pools that are not footprints in order to key in on the one that might be.”