"Latest Period Or Highest System" . . . "The full name of the latest possible geochronologic period or highest chronostratigraphic system attributable to the stratigraphic horizon from which the cataloged item was collected." . "Examples: \"Neogene\", \"Tertiary\", \"Quaternary\"" . "not in ABCD" . "2009-07-06" . "2009-04-24" . "recommended" . . . .