dördüncü çağ

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quaternary
Of fourth rank or order
{n} number four
the cardinal number that is the sum of three and one
The Quaternary age, era, or formation
Later than, or subsequent to, the Tertiary; Post-tertiary; as, the Quaternary age, or Age of man
The second period of the Cenozoic era, following the Tertiary; also, the corresponding system of rocks It began two to three Ma and extends to the present It consists of two epochs, the Pleistocene and the Holocene
Geophysics the second period of the Cenozoic age, beginning three million years ago and extending to the present Geology relating to the rocks and deposits formed during this time R
{i} group of four; number four; second part of the Cenozoic era, present geologic period (Geology)
(1) The youngest geologic period; includes the present time (2) The latest period of time in the stratigraphic column, 0 - 2 million years, represented by local accumulations of glacial (Pleistocene) and post-glacial (Holocene) deposits which continue, without change of fauna, from the top of the Pliocene (Tertiary) The quaternary appears to be an artificial division of time to separate pre-human from post-human sedimentation As thus defined, the quaternary is increasing in duration as man's ancestry becomes longer
Consisting of four; by fours, or in sets of four
The geologic time period comprising about the last 1 65 million years
The number four
{s} composed of four parts; arranged in quarters; pertaining to the present geological period, of the second part of the Cenozoic era (Geology)
– At the fourth stage or level
(4) Geology Of, belonging to, or designating the geologic time, system of rocks, and sedimentary deposits of the second period of the Cenozoic Era, from the end of the Tertiary Period through the present, characterized by the appearance and development of human beings and including the Pleistocene Epoch and the Holocene Epoch [Back To Top]
last 2 million years
Of a mathematical expression containing e.g. x[4]
The geologic period beginning two to three million years ago and extending to the present
A period within the Cenozoic era that includes the time 1 8 million years ago until the present
See the Chart of Geology
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