VML rock engraving thin sections. Layering unit LU-1 corresponds to the Holocene and LU-2 to the Late Pleistocene. Dark bands of the subunits represent wet phases as follows: WH1, Little Ice Age wet phase; WH2, Medieval Warm wet phases; WH3–WH6, Late Holocene wet phases; WH7, Mid Holocene wet phase; WH8–WH12, Early Holocene wet phases; WPO, Younger Dryas wet phase. (a) Coso-7, with confirmed VML minimum-limiting age of 5,900 yrs cal BP. (b) Coso-9, with confirmed VML minimum-limiting age of 11,100 yrs cal BP. (Images courtesy of Liu.)
