The surficial sediments of Fayetteville Green Lake show laminated and unlaminated beds. Couplets of a basal pale and an overlying dark lamina are varves. Unlaminated beds are probably deposited from density currents. Varve sedimentation averages 0.07 g cm−2 yr−1 dry wt or 0.05 g cm−2 yr−1 CaCO3. Turbidites account for 40 to 65% total sediment accumulation.