A 220-million-year-old dinosaur cemetery has been discovered in western Argentina, with remains of a dozen animals, Argentine researchers said Wednesday.
“There are almost ten different individuals. It is a mass of agglomerated bones, there is practically no sediment. It’s like they made a well and filled it with bones. It’s very impressive, “said Argentinian paleontologist Ricardo Martinez.
According to the scientist of the Institute and Museum of Natural Sciences of the University of San Juan, “these fossils belong to the Ischigualasto basin, which corresponds to 220 million years, an era of which little is known about the fauna”.
The cemetery was discovered in September 2018 in the province of San Juan (1100 km west of Buenos Aires), said Cecilia Apaldetti, also a researcher and member of the National Council of Science and Technology.
This discovery “is doubly important because there are at least seven or eight individuals of dicynodonts, the ancestors of mammals, the size of an ox, and other archosaurs (reptiles) that we do not yet know. who may be dinosaurs or an ancestor of the great crocodiles, “Martinez explained.
This “bone bed” is between one and two meters in diameter and the same depth.
To explain the causes of such an accumulation of bones, scientists speculate that “there was a time of great drought and that there was water, a small lake where the herbivores came en masse to drink, and as the water evaporated, the animals weakened and died on the spot.
Argentina has many fossils from three periods, the Triassic, Jurassic and Cretaceous Mesozoic Era. They belong to animals different from those found in the northern hemisphere.
The most important dinosaur fossil deposits are found in Patagonia, the La Rioja and San Juan regions and the province of Salta.
Phyllis Reddon is a general assignment reporter at Rise Media. She has covered sports, entertainment and many other beats in her journalism career, and has lived in New York for more than 6 years. Phyllis has appeared periodically on national television shows and has been published in (among others) Yahoo News,, Politico, The Atlantic, Harper’s, Wired.com, Vice and Salon.com.