Fig. 9

Boundaries for ripple-forming flow velocities U based on calcite particle size \(d_{50}\) (scenario 3 between dashed lines). \(\hbox {T}\,=\,20^{\,\circ } \hbox {C}\), \(\nu \,=\,9.81\, \cdot \,10^{-7} \, {\hbox {m}}^2/\hbox {s}\)