In [[:file:interpreting-seismic-data_fig12-8.png|Figure 1]], a [[Basic open hole tools#Sonic|sonic]] log has been converted to time and velocity. Note that the time axis on the seismic section and the converted sonic log are linear, while the depth tick marks on the sonic are nonlinear. The geological horizons annotated on the sonic log are located via the depth ticks from picks on other logs ([[Basic open hole tools#Resistivity | In [[:file:interpreting-seismic-data_fig12-8.png|Figure 1]], a [[Basic open hole tools#Sonic|sonic]] log has been converted to time and velocity. Note that the time axis on the seismic section and the converted sonic log are linear, while the depth tick marks on the sonic are nonlinear. The geological horizons annotated on the sonic log are located via the depth ticks from picks on other logs ([[Basic open hole tools#Resistivity |