(a)
(b)
Figure 4: Numerical solutions for scenario A illustrating self-organized oscillations. The calcite composition at the bottom of the system () is plotted as a function of time. (a) = = 0.8. Oscillation period = 17,290 a. (b) Complex oscillation obtained with = 0.8 and = 0.74. Average time between troughs = 26,288 a.