دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the time period from 65 million years ago until the present. It is marked by rapid evolution of mammals and birds, flowering plants, grasses, and shrubs, and little change in invertebrates.

adj: 1. of or relating to the geologic epoch from about 2.5 million to 10 thou- sand years ago, the first part of the Quaternary period of the Cenozoic era, sometimes called the Ice Age, which extended from the end of the Tertiary period until the last re- treat of the northern continental ice sheets. 2. of or relating to the rocks or sediments formed during this epoch.