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Tertiary Period, former official interval of geologic time lasting from approximately 66 million to 2.6 million years ago. It is the traditional name for the first of two periods in the Cenozoic Era (66 million years ago to the present); the second is the Quaternary Period (2.6 million years ago to the present).
May 18, 2018 · The Tertiary Period spans the time between roughly 65 million years ago (mya) and 2.6 mya. When referred to in terms of a Paleogene Period and a Neogene Period, the Paleogene Period extends from approximately 65 mya to 23 mya, and the Neogene Period from 23 mya to 2.6 mya. The Tertiary Period contains five geologic epochs.
Mar 23, 2024 · Characteristics of the Tertiary Period. The main characteristics of the Tertiary Period are: It began 65 million years ago and ended 1.8 million years ago, spanning a total interval of 63.2 million years, though this periodization has been reformulated in the present time. The climate was changing, alternating warm periods with glacial periods.
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The Eocene is the second of five epochs in the Tertiary Period the second of three epochs in the Paleogene and lasted from about 55.8 to 33.9 million years ago.*. The oldest known fossils of most of the modern orders of mammals appear in a brief period during the early Eocene and all were small, under 10 kg.
TERTIARY PERIOD 65-2 Million Years Ago: Part of the Cenozoic era, the Tertiary period is divided into five epochs: Paleocene, Eocene, Oligocene, Miocene, and Pliocene. During this time mammals diversified quickly.
