(sen-zoik, sen-)adj Of, belonging to, or designating the latest era of geologic time, which includes the Tertiary Period and the Quaternary Period and is characterized by the formation of modern continents, glaciation, and the diversification of mammals, birds, and plants [Back To Top]
The most recent era of geologic time, extending from the close of the Mesozoic about 65 million years ago to the present
The youngest Era of geological time spanning from approximately 65 millions of years ago to the present, consisting of the Tertiary and Quaternary Periods
adj Of, belonging to, or designating the latest era of geologic time, which includes the Tertiary and Quaternary periods and is marked by the evolution of mammals, birds, plants, modern continents, and glaciation