Abstract
The chapter begins with the description of rock coring and logging, in that, it defines rock joints, joint set, joint filler materials, rock joint types, core loss information, fractured zones, drill water return information, water color, joint roughness, joint alteration, joint filler material, joint stains, and so on. Further, the chapter discusses the oriented rock coring in which a knife is installed in the core barrel to create a mark in the rock core. This mark is known as the scribe mark. The driller finds the North direction using a compass. Then the driller places the knife along the North direction. The line connecting the knife point (point A) and the center of the core will be the North-South line (line AN).
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