Fig. 9.

(a) Influence of subarea size on dissolution flux spectra within one image of a single gypsum crystal without tall cleavage steps. (b) Dissolution flux spectra measured on 10 µm patches of the (010) cleavage surface of seven gypsum crystals without tall cleavage steps. The maximum uncertainty in the distribution at any point is about 0.45%, characterized as one standard deviation in Monte Carlo propagation of uncertainties in identical measurements made on calcite (104) cleavage surfaces (Brand et al., 2017). (For interpretation of the references to color in this figure, the reader is referred to the web version of this article.)