QUATERNARIES
fourth in order or rank; belonging to the fourth order.
relating to or denoting the most recent period in the cenozoic era, following the tertiary period and comprising the pleistocene and holocene epochs.
denoting an ammonium compound containing a cation of the form nrâ‚„âº, where r represents organic groups or atoms other than hydrogen.
the quaternary period or the system of deposits laid down during it.
relating to or denoting the most recent period in the cenozoic era, following the tertiary period and comprising the pleistocene and holocene epochs.
denoting an ammonium compound containing a cation of the form nrâ‚„âº, where r represents organic groups or atoms other than hydrogen.
the quaternary period or the system of deposits laid down during it.