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→Identifying the occurrence of difficult lithologies
==Identifying the occurrence of difficult lithologies==
==Identifying the occurrence of difficult lithologies==
[[file:difficult-lithologies_fig1.png|thumb|{{figure number|1}}M-N crossplot for mineral identification. © Schlumberger Well Services, 1979.]]
[[file:difficult-lithologies_fig1.png|thumb|300px|{{figure number|1}}M-N crossplot for mineral identification. © Schlumberger Well Services, 1979.]]
The occurrence of difficult lithologies can be identified from the following sources:
The occurrence of difficult lithologies can be identified from the following sources: