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quaternary    音標拼音: [kw'ɑtɚn,ɛri]
a. 由四要素形成的

由四要素形成的

quaternary
四進制的

quaternary
四進 四元

quaternary
adj 1: consisting of or especially arranged in sets of four;
"quaternate leaves"; "a quaternary compound" [synonym:
{quaternate}, {quaternary}]
2: coming next after the third and just before the fifth in
position or time or degree or magnitude; "the quaternary
period of geologic time extends from the end of the tertiary
period to the present" [synonym: {fourth}, {4th}, {quaternary}]
n 1: last 2 million years [synonym: {Quaternary}, {Quaternary
period}, {Age of Man}]
2: the cardinal number that is the sum of three and one [synonym:
{four}, {4}, {IV}, {tetrad}, {quatern}, {quaternion},
{quaternary}, {quaternity}, {quartet}, {quadruplet},
{foursome}, {Little Joe}]

Quaternary \Qua*ter"na*ry\, n. [L. numerus quaternarius: cf. F.
quaternaire.]
1. The number four. --Boyle.
[1913 Webster]

2. (Geol.) The Quaternary age, era, or formation. See the
Chart of {Geology}.
[1913 Webster]


Quaternary \Qua*ter"na*ry\, a. [L. quaternarius consisting of
four each, containing four, fr. quaterni four each, fr.
quattuor four: cf. F. quaternaire. See {Four}.]
[1913 Webster]
1. Consisting of four; by fours, or in sets of four.
[1913 Webster]

2. (Geol.) Later than, or subsequent to, the Tertiary;
Post-tertiary; as, the Quaternary age, or Age of man.
[1913 Webster]



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  • Quaternary Period - an overview | ScienceDirect Topics
    The Quaternary Period is defined as the most recent and shortest geological period characterized by significant climate instabilities, including multiple glacial and interglacial stages with cyclicities of 23, 41, and 100 kyr It started around 2 58 million years ago and is marked by irregular climatic cyclicity, requiring a deeper understanding of the processes and mechanisms driving these
  • Quaternary International | Journal | ScienceDirect. com by Elsevier
    Quaternary International is an international, peer-reviewed journal that embraces all aspects related to Quaternary Science It is the official journal of the International Union for Quaternary Research (INQUA) and aims to publish high-quality and impactful articles covering significant advances across all disciplines related to Quaternary
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    Quaternary Environments and Humans (QEH) is the full Open Access, official journal of the International Union for Quaternary Research (INQUA) The journal aims to publish peer reviewed papers under the auspices of the leading Quaternary association, with a special focus on recent advances in Quaternary sciences that appeal to a wide audience and that combine approaches from several disciplines
  • Quaternary - an overview | ScienceDirect Topics
    Quaternary During the past 2 million years, climatic fluctuations of dry glacial and wet interglacial periods affected the geographic ranges of both temperate and tropical areas Palynological sequences indicate that at least during the Pleistocene, major climatic changes affected speciation and biogeographic patterns in South America The modern geographical distributions of many endemic taxa
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    Quaternary Science Advances (QSA) is an international and fully Open Access journal supporting the rapid publication of peer-reviewed original research articles, short communications and review papers dealing with all aspects of Quaternary science
  • Defining the Quaternary - ScienceDirect
    The Quaternary System is under threat of extinction as a chronostratigraphic unit in the international Geological Time Scale In its place, the Neogen…
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    The Quaternary System Period represents the past 2 58 million years and is officially subdivided into the Pleistocene and Holocene series epochs, with…
  • Quaternary Glaciations and Chronology - ScienceDirect
    The onset of the recent ice age dates back much further than the Quaternary An overall, long-term trend of cooling global climates occurred throughout the Tertiary Period The opening of the North Atlantic Ocean, accompanied by the simultaneous closure of the east–west-aligned Tethys Ocean, characterize this period This development led to profound palaeogeographical rearrangements and
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