Cementation characteristics and age of beachrocks in a fresh-water environment, Lake Ä°znik, NW Turkey

► The cementation features and OSL age of freshwater lake beachrock were discussed. ► Lake-water chemistry along with favorable climate favors precipitation of aragonite. ► The tecture and composition of cements are similar to intertidal beachrock. ► Beachrock cemented at the last glacial maximum, climatic optimum and Late Holocene.