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name of the geological age. The first era of the new generation. From 65 million to 3 million years now. It lasts about 62 million years. The term "third era" was created in 1779 by the Italian geologist G. Arduino. It's early and late. The early Third Age ranged from 65 million to 25 million years old, with Paleocene Epoch, Eocene Epoch and Oligocene Epoch, and the late Third Age from 25 to 3 million years old, with miocene Epoch and Poliocene. The formation of the Third Order is called the "Third System" and represents the symbol "R". The formation formed in the early Third Order is called the "Lower Third System", which represents the symbol "E", and the formation of the Late Third Order is called the "Upper Third System" and the symbol is "N". The Third Age was most prosperous with plants, insects, birds and mammals. Early Tri-Third Age marine invertebrates were characterized by large pores (currency worms) and mammals of ancient types. In the late Third Age, large pores disappeared and were replaced by small planktoworms, and mammals replaced ancient types with new ones.