Changes

:<math>\mbox{RHOMAA} = \frac{\rho_{\rm log} - \phi \cdot \rho_{\rm fl}}{1.0 - \phi}</math>

:<math>\mbox{RHOMAA} = \frac{\rho_{\rm log} - \phi \cdot \rho_{\rm fl}}{1.0 - \phi}</math>

[[file:difficult-lithologies_fig3.png|thumb|{{figure number|3}}MID plot for mineral identification. © Schlumberger Educational Services, 1989.]]

[[file:difficult-lithologies_fig3.png|thumb|300px|{{figure number|3}}MID plot for mineral identification. © Schlumberger Educational Services, 1989.]]

UMAA can be determined from the chart in [[:file:difficult-lithologies_fig2.png|Figure 2]]. Start by marking the Pe value on the photoelectric portion of the horizontal axis (left side), then go vertically to the bulk density value. Next, move horizontally to the apparent total porosity, and then down to the UMAA value.

UMAA can be determined from the chart in [[:file:difficult-lithologies_fig2.png|Figure 2]]. Start by marking the Pe value on the photoelectric portion of the horizontal axis (left side), then go vertically to the bulk density value. Next, move horizontally to the apparent total porosity, and then down to the UMAA value.