Contrast the binary compounds as a class with the quaternary compounds as a class.
They are referred to the dawn of the quaternary or Pleistocene period.
In any case they must certainly have existed as a distinct type in the quaternary period, and probably much earlier.
In Europe it has appeared since the neolithic age, after the quaternary period.
The existence of Homo sapiens in the quaternary epoch is also certain.
Does pre-glacial mean Pliocene, or is it included in the quaternary?
So much, then, for the quaternary Pampean mud interlaced with the bones of giant animals.
The flora itself at the quaternary age was of extreme vigor.
Nothing shows that it existed in the ancient tertiary or quaternary flora of the south-west of Europe.
Of these indications of race we cannot hope to meet with any of the former class in quaternary gravel or caves.
early 15c., "consisting of four parts," from Latin quaternarius "of four each, containing four," from quaterni "four each, by fours," from quater "four times," related to quattuor "four" (see four). Also as a noun, "the number four" (mid-15c.), from Latin quaternarius.
In geological sense, attested from 1843 in English, proposed 1829 by French geologist Jules Pierre François Stanislas Desnoyers (1800-1887) as name for "the fourth great epoch of geological time," but because it comprises only the age of man, and the other epochs are many hundred times longer, not all accepted it.
quaternary qua·ter·nar·y (kwŏt'ər-něr'ē, kwə-tûr'nə-rē)
Consisting of four; in fours.
Relating to an atom bonded to four carbon atoms.
Noun Quaternary. The second and last period of the Cenozoic Era, from about 2 million years ago to the present. During this time the continents were situated approximately as they are today, although the geography was different due to fluctuations in sea levels caused by the advance and retreat of ice sheets. Humans first appeared during this period. See Chart at geologic time.
Adjective Relating to or having a carbon atom that is attached to four other carbon atoms in a molecule. Quaternary pentane, for example, contains five carbon atoms of which one is in the center and the other four are each attached to it.