O se atunse gidigidi ise tele lori awon ohun toun fa iyipo osowo, o si polongo fun ilo awon eto isenawo ati oro owo lati satunse ipa buburu awon economic ifaseyin oro-okowo ati itelole oro-okowo.. 
It is the youngest period of the Mesozchiv era, and at 80 million years long, the longest period of the IbùdótezTgaines eọ̀n.. 