Subterranean transport and deposition of quartz by ants in sandy sites relevant to age overestimation in optical luminescence dating

► Subterranean sand grain transport by ants can cause errors in age estimation using luminescence dating. ► Upward grain movement dominates subterranean grain transport leading to age overestimation as the major expected affect. ► Grain transport without light exposure is dominant in the upper 30 cm of an ant nest.