The Quaternary Period; Quaternary Paleogeography; Fossil Periglacial Phenomena The Quaternary Period. The Quaternary period displays high rates of evolution particularly among mammals. y (kwŏt′ər-nĕr′ē, kwə-tûr′nə-rē) adj. The Quaternary Period is in the Cenozoic Era, occurring at the present time , and after the Neogene Period. i / kwə-TUR-nə-ree, KWOT-ər-nerr-ee) is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS). During this period the increase in the human population has had significant effect on the populations of both other animals and plants. This is an important period for us because it encompasses the entire period over which humans have existed—our species evolved about 200,000 years ago. The Quaternary Period allowed for rapid evolutionary advances as a result of adaptive radiation stimulated by the extreme climatic and environmental changes. The most recent period of Earth’s geologic history—spanning the last 2.6 million years—is known as the Quaternary period. The Quaternary is the last period in the Cenozoic Era and Geologic History. The last major cold period was known as the Pleistocene. The Quaternary Period /kwəˈtɜrnəri/ is the most recent of the three periods of the Cenozoic Era in the geologic time scale of the ICS.It follows the Neogene Period and spans from 2.588 ± 0.005 million years ago to the present. (Pleistocene epoch, NOAA Paleoclimate Glossary) An epoch of the Quaternary period dating from the end of the Pleistocene approximately 11,000 years ago until the present. An interval of the Quaternary period, from 1.8 million years before present to 10 thousand years before present. The Quaternary is divided into two epochs: the Pleistocene and the Holocene. The Quaternary Period is the most recent geologic era spanning the last 2.6 My. It started 2.6 million years ago and ended just 10,000 years ago. Adaptive radiation is the continual multiple speciation from one common ancestor. The Quaternary is the most recent geological period of time in Earth’s history, spanning the last two million years and extending up to the present day. Quaternary Of, relating to, or being the period of geologic time from about 2.6 million years ago to the present, the more recent of the two periods of the Cenozoic Era. It is also the time of giant mammals, humans, Saber toothed cats and other fierce predators all share the stage as the earth takes its present form. Quaternary (/ k w ə ˈ t ɜːr n ə r i, ˈ k w ɒ t. ər ˌ n ɛr. 2. Consisting of four; in fours. It started 2.6 million years ago and ended just 10,000 years ago. 1. Quaternary period: the last two million years of the Cenozoic Era, from 2 million years BP (the end of the Tertiary) to the present time. (Holocene epoch, NOAA Paleoclimate Glossary) It follows the Neogene Period and spans from 2.588 ± 0.005 million years ago to the present. 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