SCIENCE 19. APR. 2021
After a sudden change in the climate around 200 million years ago in late Triassic period, both meat and plant easting dinosaurs suddenly appeared in the eastern part of Greenland.
The arrival coincides with the fact that the Earth in that late Triassic time period experienced wild climate change where the CO2 concentration in the atmosphere fell by half according to the study by Lars B. Clemmensen from Copenhagen Universitet.
Plateosaurus was a herbivore. It lived in the late Triassic period. The very first long-necked, four-legged and 5 meter long herbivore Plateosaurus arrived in Greenland 214 million years ago. According to the study the first dinosaurs 230 million years ago lived in and area in South America around northern Argentina and southern Brazil before appearing in east Greenland 15 million years later.
The drop in Co2 levels made the conditions on Earth milder, allowing herbivores, like the Plateosaurus, to migrate to east Greenland because at that time there was no ocean in between and no big mountains when the world consisted of one supercontinent called Pangæa. East Greenland was not in the same place as it is today. In the Triassic period, this area formed the edge of the great continent of Pangea, and it was approximately where southern Europe is today. Since then, it has thus "moved" to where Greenland is located.
The hunt for plateosaurs in East Greenland was arranged by Geocenter Møns Klint who gathered a group of Europe's best dinosaur hunters on the expedition.
Eight researchers visited East Greenland in 2012 to excavate the 210 million-year-old fossilized bones from a dinosaur of the species plateosaurus. They brought home both this large herbivore as well as a large carnivore and a number of other fossilised animals.
According to the researchers on the expedition, the finding near Jameson Land in East Greenland is the northernmost discovery of a herbivorous dinosaur.
The fossil finds in Jameson Land, East Greenland were moved to Denmark in 2012 to be preserved and scientifically examined and shown at a special exhibition at Geocenter Møns Klint. In 2023 they are delivered back to Greenland, which has ownership of these rare fossils.