article_snippet.sent: Palaeontologist Jean-Michel Mazin of France’s National Centre of Scientific Research, said at the time, from the prints,
article_snippet.sent: ‘their were very hard to see because there were a lot of little stones (on the ground), there was grass growing there, and you really had to have a trained eye to notice something,Palaeontologist Jean-Michel Mazin of France
article_snippet.sent: However, the site looked very different millions of years ago, when the region was muddy and flat.
article_snippet.sent: There are layers of prints preserved in the limestone because the marks hardened in dry periods, before being covered in preservative mud, enabling the process to start again.
article_snippet.sent: Paleontologist Klaus Schutt also suggested that a huge volcanic eruption threw millions of cubic metres of ash into space 68 million years ago, which gradually covered the prints to protect the prints, Unesco reported.
article_snippet.sent: A decade after the discovery, which was made by miners in the mid 1980s, palaeontologists began to document the prints.
article_snippet.sent: ‘The cliff has been quite affected by the many years of extracting the raw material,’ Elizabeth Baldivieso, administrator of Cretaceous Park which protects the fossil filed, told AFP.
article_snippet.sent: A decade after their discovery, which was made by miners in the mid 1980s, palaeontologists began to document the prints (some of which are shown).