In North America in the northern plains of the United States and the southern plains of Alberta and Saskatchewan, there's this unit of rock called the Hell Creek Formation that produces the last dinosaurs that lived on Earth.
U Sjevernoj Americi u području Northern Plains u SAD-u i u području Southern Plains Alberte i Saskatchewana, ondje se nalazi ova stijena koja se zove Hell Creek Formation koja daje posljednje dinosaure koji su živjeli na Zemlji.