At the end of this period, there was a mass extinction commonly referred to as the Cretaceous–Paleogene extinction event, as well the Cretaceous–Tertiary extinction event.{efn|This designation has as a part of it a term, `Tertiary`, that is now discouraged as a formal geochronological unit by the International Commission on Stratigraphy.}} A.....
Found on
http://en.wikipedia.org/wiki/Maastrichtian
European stage of the Upper Cretaceous, spanning the time between 72 and 66 million years ago.
Found on
https://www.encyclo.co.uk/local/21202
No exact match found.
