Los Petenes Biosphere Reserve provide information about late Holocene hydrological
variations on the western margin of the Yucatan Peninsula, Mexico. Periods of lower than
average amounts of K‐bearing clastics during 2580–2050, 1100–825 and 700–160 cal a BP
represent drought intervals. Magnetic minerals were better preserved during these arid
intervals, as the swamp was not perennially anoxic. Hydroclimate was unstable during 2580 …