Age-depth model of (A) Lake Ķikuru, (B) Lake Lilaste, (C) Lake Āraišu, (D) Lake Trikātas and (E) Lake Lielais Svētiņu. The SCP (spheroidal carbonaceous particles) and the tephra of Askja AD 1875 eruption are indicated. Rest of the dates are ¹⁴C. The dotted middle curve shows the weighted mean ages of all depths, whereas the greyscale shows uncertainties (a darker shade of grey indicates a more certain section).