Thousands of Ancient Dinosaur Footprints Unearthed in Italy

Thousands of dinosaur footprints dating back approximately 210 million years have been uncovered in northern Italy. This significant discovery, made in the Valle di Fraele near Bormio, reveals tracks that are believed to belong to prosauropods, an ancient group of herbivorous dinosaurs. The footprints, measuring around 40 centimetres in diameter, showcase detailed impressions of toes and claws.

The markings were found on a near-vertical rock face positioned 2,000 metres above sea level. This location was once the floor of a warm lagoon, which provided an ideal environment for dinosaurs to traverse along its shores. Experts suggest that these footprints were formed by herds moving through the area, leaving tracks in the mud close to the water’s edge. Notably, the positioning of the prints indicates that the dinosaurs paused to rest, as evidenced by handprints differing in size and shape from the claw marks.

Significance of the Discovery

Stretching over five kilometres, these tracks hold immense paleontological value, representing what the Milan Natural History Museum describes as one of the most important Triassic fossil track sites globally. The tracks remained well-preserved under layers of sediment for nearly a quarter of a billion years, thanks to their protective covering.

“This is one of the largest and oldest footprint sites in Italy, and among the most spectacular I’ve seen in 35 years,” remarked Cristiano Dal Sasso, a paleontologist at the Milan Natural History Museum, during a press conference held at the headquarters of the Lombardy Region. His sentiment reflects the excitement within the scientific community regarding this rare find.

Experts believe these prints were made on soft, pliable ground that comprised the tidal flats surrounding the ancient Tethys Ocean. “The footprints were impressed when the sediments were still soft,” explained Fabio Massimo Petti, an ichnologist at the MUSE museum of Trento. “The muds, now turned to rock, have preserved remarkable anatomical details of the feet.”

As geological processes unfolded over millions of years, the movements of Earth’s tectonic plates transformed the area. The once-horizontal sedimentary rocks were folded into the towering Alps, shifting the fossilized dinosaur footprints to a vertical position on a mountain slope.

Discovery and Future Research

The footprints were first identified by wildlife photographer Elio Della Ferrera in September 2023. His discovery marked the first report of this specific collection of footprints, prompting him to contact experts to investigate further. “I hope this discovery will spark reflection in all of us, highlighting how little we know about the places we inhabit: our home, our planet,” Ferrera stated in an interview.

While several other sites with footprints of similar geological age exist, these marks are particularly notable as they represent the first dinosaur footprints found in Lombardy. They are also the only such fossils exposed north of the significant Alpine fault line known as the Insubric Line.

Due to the remote location where the prints were found, traditional trails do not provide access for researchers. Consequently, scientists plan to employ drones and remote sensing technologies to study the area further. The prints may represent a previously unidentified ichnospecies, a classification system used to describe patterns of behavior in ancient organisms when biological data is scarce.

“Only future detailed investigations will allow for precise classification,” the museum noted, emphasizing the importance of ongoing research in understanding these fossilized tracks.