Tertiary is an officially deprecated but still widely used term for a geologic period from 65 million to 2.6 million years ago, a time span that lies between the superseded Secondary period and the Quaternary. The Tertiary is no longer recognized as a formal unit by the International Commission on Stratigraphy, its traditional span being divided between the Paleogene and Neogene Periods of the Cenozoic Era.

The period began with the demise of the non-avian dinosaurs in the Cretaceous–Paleogene extinction event, at the start of the Cenozoic Era, spanning to the beginning of the most recent ice age at the end of the Pliocene Epoch. The Tertiary also included the early Pleistocene.

Read more about TertiaryHistorical Use of The Term, Geological Events, Climate

Other articles related to "tertiary":

Palaeognathae - Biogeography - Tertiary Radiation Hypothesis
... In this emphasis on the Tertiary, rather than Cretaceous period, as the time of basal divergences between neornithines, he follows Olson ... a group of flying birds that were common in the Tertiary of the northern hemisphere, were also paleognaths ...
Tertiary Entrance Exam
... For the new examination and curriculum system that has replaced the Tertiary Entrance Exam (TEE), see WACE (Western Australian Certificate of Education) ... The Tertiary Entrance Examination (TEE) was the standard academic examination for secondary students completing their twelfth year of schooling in Western Australia ... The exam results were used to determine the Tertiary Entrance Rank and the Tertiary Entrance Score ...
Tertiary - Climate
... Climates during the Tertiary slowly cooled, starting off in the Paleocene with tropical-to-moderate worldwide temperatures and ending before the first extensive glaciation at the start of the Quaternary ...
Tertiary Entrance Rank - Calculation of The TER in Western Australia
... The TER was calculated by the Tertiary Institutions Service Centre (TISC) for students who successfully completed the Western Australian Certificate of Education (WACE) and fulfilled other criteria to ... for calculating the TER for WA students was changed for tertiary entry in 2009 ... In 2008, a Tertiary Entrance Aggregate (TEA) was calculated using the sum of the four highest Course of Study Levels of Achievement ...
Economic Sector
... would be workers in the secondary sector.) Tertiary Involves the supplying of services to consumers and businesses, such as baby-sitting, cinema and banking ... A shopkeeper and an accountant would be workers in the tertiary sector.) In the 20th century, it began to be argued that traditional tertiary services could be further distinguished from "quaternary" and ...

Famous quotes containing the word tertiary:

    Morality is a venereal disease. Its primary stage is called virtue; its secondary stage, boredom; its tertiary stage, syphilis.
    Karl Kraus (1874–1936)