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Study
The latest found more than 16 thousand footprints
dinosaurs
in Bolivia.This finding shows that this busy route was crossed by Theropods, predatory dinosaurs with three claws that walked on two legs.
Paleontologists have described the tracks for the first time, providing a rare glimpse into the movements of dinosaurs in their habitat.
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After counting, scientists found a total of 16,600 theropod tracks at the Carreras Pampas track site in Torotoro National Park, Bolivia.This finding is said to be more than any other trace site.
There, theropods stuck their feet into soft, deep mud between 101 million and 66 million years ago, at the end of the Cretaceous period.
The study is the first scientific survey of the footprint-covered area, which covers approximately 7,485 square meters.Some of the tracks were isolated, but many formed multiple footprints made by the same animal, the researchers reported Wednesday (3/12) in the journal PLOS One.
“Everywhere you look at the rock layers at the site, there are dinosaur tracks,” said Jeremy McLarty, one of the study’s authors, who is a biology professor and director of the Dinosaur Science Museum and Research Center at Southern Adventist University in Texas, quoted from
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.
McLarty said most of the trail moves in a north-northwest or southeast direction.
The tracks were likely made over a relatively short time span, suggesting that this region was a major route for theropods and may have been part of a dinosaur highway that stretched across Argentina, Bolivia and Peru.
The shape of the tracks and the distance between them reveal how the animals moved.Some are said to have walked at a leisurely pace, while others galloped along the muddy shore, and more than 1,300 footprints hold evidence of them swimming in shallow water.
Some dinosaur footprints include drag marks from theropod tails, and the varying lengths and widths of the footprints indicate that these dinosaurs varied greatly in size.
The animals range in size from about 65 centimeters hip height to more than 125 centimeters.Hundreds of additional footprints at the site were made by birds that shared the beach with the dinosaurs.
Since the 1980s, Carreras Pampas has been known for its dinosaur tracks, but their extent and number have never been studied in detail.
McLarty and his team’s research raises new questions about these preserved slices of South American Cretaceous life, such as why almost all the footprints belong to theropods and why there are so many of them.
Many sites around the world preserve the double footprints of sauropods, long-necked, plant-eating dinosaurs that grew larger than any land animal alive today.
Sauropods were known to travel in herds, as were many types of modern large herbivores.On the other hand, theropods were predators, which generally did not form large groups.
Bolivia itself is known for having many dinosaur footprint sites dating from the Triassic, Jurassic and Cretaceous periods.
Prior to the mapping of the Carreras Pampas, the site with the most dinosaur tracks in the world was also in Bolivia, namely Cal Orck’o in Sucre, which dates from around 68 million years ago and is estimated to have around 14,000 footprints.
(lom/dmi)
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