What is quaternary?

Quaternary

The Quaternary Period 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. The relatively short period is characterized by a series of glaciations, the appearance and expansion of anatomically modern humans, and their continuing impact on the natural world. The Quaternary includes two geologic epochs: the Pleistocene and Holocene. A proposed but as of yet informal third epoch, the Anthropocene, has also gained credence as the time in which humans began to profoundly affect and change the global environment, although its start date is still disputed.

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Some articles on quaternary:

Quaternary Glaciation - Last Glaciation
... During this time, substantial glaciers advanced and retreated over much of North America and Europe, parts of South America and Asia, and all of Antarctica ... The Great Lakes formed and giant mammals thrived in parts of North America and Eurasia not covered in ice ...
American Quaternary Association
... The American Quaternary Association (AMQUA) is a professional organization of North American scientists devoted to studies of the quaternary geological period ... remarkably broad array of disciplines involved in studying the Quaternary Period" ... Environmental Forecasting from the Quaternary Sciences" and was held in Bozeman, Montana ...
Aleksis Dreimanis - Roles and Duties
1977 and 1982, Canadian delegate to the International Quaternary Association (INQUA) Congresses 1965, Co-organised the INQUA Field Excursion in the Great ...
Aquitaine Basin - Sedimentary Evolution - Cenozoic - Quaternary
... Finally, the rich prehistoric finds and their sites in the Aquitaine Basin merit mentioning, especially in the D├ępartement Dordogne. ...

More definitions of "quaternary":

  • (adj): Consisting of or especially arranged in sets of four.
    Example: "A quaternary compound"
    Synonyms: quaternate
  • (adj): Coming next after the third and just before the fifth in position or time or degree or magnitude.
    Example: "The quaternary period of geologic time extends from the end of the tertiary period to the present"
    Synonyms: fourth, 4th